docs/FoundationDB-Transaction.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1" /><title>FoundationDB.Transaction</title><link href="linuwial.css" rel="stylesheet" type="text/css" title="Linuwial" /><link rel="stylesheet" type="text/css" href="quick-jump.css" /><link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=PT+Sans:400,400i,700" /><script src="haddock-bundle.min.js" async="async" type="text/javascript"></script><script type="text/x-mathjax-config">MathJax.Hub.Config({ tex2jax: { processClass: "mathjax", ignoreClass: ".*" } });</script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script></head><body><div id="package-header"><span class="caption">foundationdb-haskell-0.1.0.0: FoundationDB C client bindings</span><ul class="links" id="page-menu"><li><a href="src/FoundationDB.Transaction.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul></div><div id="content"><div id="module-header"><table class="info"><tr><th>Safe Haskell</th><td>None</td></tr><tr><th>Language</th><td>Haskell2010</td></tr></table><p class="caption">FoundationDB.Transaction</p></div><div id="table-of-contents"><div id="contents-list"><p class="caption" onclick="window.scrollTo(0,0)">Contents</p><ul><li><a href="#g:1">Transactions</a></li><li><a href="#g:2">Mapped ranges</a></li><li><a href="#g:3">Futures</a></li><li><a href="#g:4">Key selectors</a></li><li><a href="#g:5">Advanced Usage</a></li></ul></div></div><div id="description"><p class="caption">Description</p><div class="doc"><p>This module contains the core of the FoundationDB transaction API,
 including all the basic functionality to create and run transactions.
 <code><a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></code> is a monad, and you will generally want to use it with
 do-notation.</p><pre>{-# LANGUAGE OverloadedStrings #-}
import FoundationDB.Transaction
import Data.ByteString

-- | Sets and gets a key in one transaction. Returns the ByteString
-- &quot;world&quot;.
myTransaction :: Transaction ByteString
myTransaction = do
  let mykey = &quot;hello&quot;
  set mykey &quot;world&quot;
  get mykey</pre><p>Run your transactions with <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code> in the IO monad.</p><p>The documentation in this library assumes that you already have some
 understanding of how to work with FoundationDB. If you don't, check out
 the <a href="https://apple.github.io/foundationdb/class-scheduling.html">official tutorial</a>.</p></div></div><div id="synopsis"><details id="syn"><summary>Synopsis</summary><ul class="details-toggle" data-details-id="syn"><li class="src short"><span class="keyword">data</span> <a href="#t:Transaction">Transaction</a> a</li><li class="src short"><a href="#v:runTransaction">runTransaction</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a</li><li class="src short"><a href="#v:runTransaction-39-">runTransaction'</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a)</li><li class="src short"><span class="keyword">data</span> <a href="#t:TransactionConfig">TransactionConfig</a> = <a href="#v:TransactionConfig">TransactionConfig</a> {<ul class="subs"><li><a href="#v:idempotent">idempotent</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li><a href="#v:snapshotReads">snapshotReads</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li><a href="#v:getConflictingKeys">getConflictingKeys</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li><a href="#v:maxRetries">maxRetries</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></li><li><a href="#v:timeout">timeout</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></li></ul>}</li><li class="src short"><a href="#v:defaultConfig">defaultConfig</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></li><li class="src short"><a href="#v:runTransactionWithConfig">runTransactionWithConfig</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a</li><li class="src short"><a href="#v:runTransactionWithConfig-39-">runTransactionWithConfig'</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a)</li><li class="src short"><a href="#v:cancel">cancel</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:reset">reset</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:withSnapshot">withSnapshot</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a</li><li class="src short"><a href="#v:setOption">setOption</a> :: <a href="FoundationDB-Options-TransactionOption.html#t:TransactionOption" title="FoundationDB.Options.TransactionOption">TransactionOption</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:getReadVersion">getReadVersion</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a>)</li><li class="src short"><a href="#v:setReadVersion">setReadVersion</a> :: <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:getVersionstamp">getVersionstamp</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="FoundationDB-Versionstamp-Internal.html#t:TransactionVersionstamp" title="FoundationDB.Versionstamp.Internal">TransactionVersionstamp</a>))</li><li class="src short"><a href="#v:getApproximateSize">getApproximateSize</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a>)</li><li class="src short"><a href="#v:get">get</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> (<a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>))</li><li class="src short"><a href="#v:set">set</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:clear">clear</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:clearRange">clearRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:addConflictRange">addConflictRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><span class="keyword">data</span> <a href="#t:FDBConflictRangeType">FDBConflictRangeType</a><ul class="subs"><li>= <a href="#v:ConflictRangeTypeRead">ConflictRangeTypeRead</a></li><li>| <a href="#v:ConflictRangeTypeWrite">ConflictRangeTypeWrite</a></li></ul></li><li class="src short"><a href="#v:addReadConflictKey">addReadConflictKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:addWriteConflictKey">addWriteConflictKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:getKey">getKey</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)</li><li class="src short"><a href="#v:getKeyAddresses">getKeyAddresses</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> [<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>])</li><li class="src short"><a href="#v:atomicOp">atomicOp</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Options-MutationType.html#t:MutationType" title="FoundationDB.Options.MutationType">MutationType</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:getRange">getRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>)</li><li class="src short"><a href="#v:getRange-39-">getRange'</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>)</li><li class="src short"><span class="keyword">data</span> <a href="#t:FDBStreamingMode">FDBStreamingMode</a><ul class="subs"><li>= <a href="#v:StreamingModeWantAll">StreamingModeWantAll</a></li><li>| <a href="#v:StreamingModeIterator">StreamingModeIterator</a></li><li>| <a href="#v:StreamingModeExact">StreamingModeExact</a></li><li>| <a href="#v:StreamingModeSmall">StreamingModeSmall</a></li><li>| <a href="#v:StreamingModeMedium">StreamingModeMedium</a></li><li>| <a href="#v:StreamingModeLarge">StreamingModeLarge</a></li><li>| <a href="#v:StreamingModeSerial">StreamingModeSerial</a></li></ul></li><li class="src short"><a href="#v:getEntireRange">getEntireRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>))</li><li class="src short"><a href="#v:getEntireRange-39-">getEntireRange'</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>))</li><li class="src short"><a href="#v:isRangeEmpty">isRangeEmpty</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:RangeQuery">RangeQuery</a> = <a href="#v:RangeQuery">RangeQuery</a> {<ul class="subs"><li><a href="#v:rangeBegin">rangeBegin</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></li><li><a href="#v:rangeEnd">rangeEnd</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></li><li><a href="#v:rangeLimit">rangeLimit</a> :: <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></li><li><a href="#v:rangeReverse">rangeReverse</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li></ul>}</li><li class="src short"><a href="#v:rangeKeys">rangeKeys</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)</li><li class="src short"><a href="#v:keyRangeQuery">keyRangeQuery</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></li><li class="src short"><a href="#v:keyRangeQueryInclusive">keyRangeQueryInclusive</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></li><li class="src short"><a href="#v:prefixRange">prefixRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></li><li class="src short"><a href="#v:prefixRangeEnd">prefixRangeEnd</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:RangeResult">RangeResult</a><ul class="subs"><li>= <a href="#v:RangeDone">RangeDone</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>))</li><li>| <a href="#v:RangeMore">RangeMore</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)) (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>)</li></ul></li><li class="src short"><a href="#v:watch">watch</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> ())</li><li class="src short"><span class="keyword">data</span> <a href="#t:MappedKeyValue">MappedKeyValue</a> = <a href="#v:MappedKeyValue">MappedKeyValue</a> {<ul class="subs"><li><a href="#v:parentKey">parentKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li><a href="#v:parentValue">parentValue</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li><a href="#v:mappedKeySelectorBegin">mappedKeySelectorBegin</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></li><li><a href="#v:mappedKeySelectorEnd">mappedKeySelectorEnd</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></li><li><a href="#v:mappedKeyValues">mappedKeyValues</a> :: [(<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)]</li></ul>}</li><li class="src short"><span class="keyword">data</span> <a href="#t:MappedRangeResult">MappedRangeResult</a><ul class="subs"><li>= <a href="#v:MappedRangeDone">MappedRangeDone</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>)</li><li>| <a href="#v:MappedRangeMore">MappedRangeMore</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>) (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>)</li></ul></li><li class="src short"><span class="keyword">newtype</span> <a href="#t:Mapper">Mapper</a> = <a href="#v:Mapper">Mapper</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li class="src short"><a href="#v:getMappedRange">getMappedRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>)</li><li class="src short"><a href="#v:getMappedRange-39-">getMappedRange'</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>)</li><li class="src short"><a href="#v:getEntireMappedRange">getEntireMappedRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>)</li><li class="src short"><a href="#v:getEntireMappedRange-39-">getEntireMappedRange'</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>)</li><li class="src short"><span class="keyword">data</span> <a href="#t:Future">Future</a> a</li><li class="src short"><a href="#v:await">await</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a</li><li class="src short"><a href="#v:awaitInterruptible">awaitInterruptible</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a</li><li class="src short"><a href="#v:cancelFuture">cancelFuture</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:futureIsReady">futureIsReady</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:FutureIO">FutureIO</a> a</li><li class="src short"><a href="#v:awaitIO">awaitIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a)</li><li class="src short"><a href="#v:awaitInterruptibleIO">awaitInterruptibleIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a)</li><li class="src short"><a href="#v:cancelFutureIO">cancelFutureIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> ()</li><li class="src short"><a href="#v:futureIsReadyIO">futureIsReadyIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:KeySelector">KeySelector</a><ul class="subs"><li>= <a href="#v:LastLessThan">LastLessThan</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li>| <a href="#v:LastLessOrEq">LastLessOrEq</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li>| <a href="#v:FirstGreaterThan">FirstGreaterThan</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li>| <a href="#v:FirstGreaterOrEq">FirstGreaterOrEq</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li></ul></li><li class="src short"><a href="#v:keySelectorBytes">keySelectorBytes</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></li><li class="src short"><a href="#v:offset">offset</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:TransactionEnv">TransactionEnv</a></li><li class="src short"><a href="#v:createTransactionEnv">createTransactionEnv</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../mtl-2.2.2/Control-Monad-Except.html#t:ExceptT" title="Control.Monad.Except">ExceptT</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a></li><li class="src short"><a href="#v:onEnv">onEnv</a> :: <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a)</li><li class="src short"><a href="#v:commitFuture">commitFuture</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> ())</li><li class="src short"><a href="#v:onError">onError</a> :: <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> ()</li><li class="src short"><a href="#v:getCommittedVersion">getCommittedVersion</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></li></ul></details></div><div id="interface"><a href="#g:1" id="g:1"><h1>Transactions</h1></a><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:Transaction" class="def">Transaction</a> a <a href="src/FoundationDB.Transaction.html#Transaction" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></p><div class="doc"><p>A transaction monad. This is currently exported with a <code><a href="../base-4.14.1.0/Control-Monad-IO-Class.html#t:MonadIO" title="Control.Monad.IO.Class">MonadIO</a></code> instance,
 but using it comes with caveats:</p><ul><li><code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code> will retry your transaction in some cases, which means
     any IO in your transaction will be repeated. You can disable retries by
     setting <code><a href="FoundationDB-Transaction.html#v:maxRetries" title="FoundationDB.Transaction">maxRetries</a></code> in <code><a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></code> to 0.</li><li>Transactions have strict time limits, so slow IO operations should be
     avoided.</li></ul></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:Transaction">Instances</h4><details id="i:Transaction" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:Monad:1"></span> <a href="../base-4.14.1.0/Control-Monad.html#t:Monad" title="Control.Monad">Monad</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-180" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:Monad:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-62--62--61-">(&gt;&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; (a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:-62--62--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62--62-">(&gt;&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:-62--62-" class="selflink">#</a></p><p class="src"><a href="#v:return">return</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:return" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:Functor:2"></span> <a href="../base-4.14.1.0/Data-Functor.html#t:Functor" title="Data.Functor">Functor</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-179" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:Functor:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:fmap">fmap</a> :: (a -&gt; b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:fmap" class="selflink">#</a></p><p class="src"><a href="#v:-60--36-">(&lt;$)</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:-60--36-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:Applicative:3"></span> <a href="../base-4.14.1.0/Control-Applicative.html#t:Applicative" title="Control.Applicative">Applicative</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-178" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:Applicative:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:pure">pure</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:pure" class="selflink">#</a></p><p class="src"><a href="#v:-60--42--62-">(&lt;*&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (a -&gt; b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:-60--42--62-" class="selflink">#</a></p><p class="src"><a href="#v:liftA2">liftA2</a> :: (a -&gt; b -&gt; c) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> c <a href="#v:liftA2" class="selflink">#</a></p><p class="src"><a href="#v:-42--62-">(*&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:-42--62-" class="selflink">#</a></p><p class="src"><a href="#v:-60--42-">(&lt;*)</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:-60--42-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadIO:4"></span> <a href="../base-4.14.1.0/Control-Monad-IO-Class.html#t:MonadIO" title="Control.Monad.IO.Class">MonadIO</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-181" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadIO:4"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:liftIO">liftIO</a> :: <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:liftIO" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadThrow:5"></span> <a href="../exceptions-0.10.4/Control-Monad-Catch.html#t:MonadThrow" title="Control.Monad.Catch">MonadThrow</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-182" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadThrow:5"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:throwM">throwM</a> :: <a href="../base-4.14.1.0/Control-Exception-Base.html#t:Exception" title="Control.Exception.Base">Exception</a> e =&gt; e -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:throwM" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadCatch:6"></span> <a href="../exceptions-0.10.4/Control-Monad-Catch.html#t:MonadCatch" title="Control.Monad.Catch">MonadCatch</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-183" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadCatch:6"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:catch">catch</a> :: <a href="../base-4.14.1.0/Control-Exception-Base.html#t:Exception" title="Control.Exception.Base">Exception</a> e =&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; (e -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:catch" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadMask:7"></span> <a href="../exceptions-0.10.4/Control-Monad-Catch.html#t:MonadMask" title="Control.Monad.Catch">MonadMask</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-184" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadMask:7"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:mask">mask</a> :: ((<span class="keyword">forall</span> a. <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:mask" class="selflink">#</a></p><p class="src"><a href="#v:uninterruptibleMask">uninterruptibleMask</a> :: ((<span class="keyword">forall</span> a. <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b <a href="#v:uninterruptibleMask" class="selflink">#</a></p><p class="src"><a href="#v:generalBracket">generalBracket</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; (a -&gt; <a href="../exceptions-0.10.4/Control-Monad-Catch.html#t:ExitCase" title="Control.Monad.Catch">ExitCase</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> c) -&gt; (a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> b) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (b, c) <a href="#v:generalBracket" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadBase:8"></span> <a href="../transformers-base-0.4.5.2/Control-Monad-Base.html#t:MonadBase" title="Control.Monad.Base">MonadBase</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-191" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadBase:8"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:liftBase">liftBase</a> :: <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> &#945; -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> &#945; <a href="#v:liftBase" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadBaseControl:9"></span> <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:MonadBaseControl" title="Control.Monad.Trans.Control">MonadBaseControl</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-193" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadBaseControl:9"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs associated-types"><p class="caption">Associated Types</p><p class="src"><span class="keyword">type</span> <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:StM" title="Control.Monad.Trans.Control">StM</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#t:StM" class="selflink">#</a></p></div> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:liftBaseWith">liftBaseWith</a> :: (<a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:RunInBase" title="Control.Monad.Trans.Control">RunInBase</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:liftBaseWith" class="selflink">#</a></p><p class="src"><a href="#v:restoreM">restoreM</a> :: <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:StM" title="Control.Monad.Trans.Control">StM</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:restoreM" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadReader:10"></span> <a href="../mtl-2.2.2/Control-Monad-Reader-Class.html#t:MonadReader" title="Control.Monad.Reader.Class">MonadReader</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-189" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadReader:10"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:ask">ask</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> <a href="#v:ask" class="selflink">#</a></p><p class="src"><a href="#v:local">local</a> :: (<a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a>) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:local" class="selflink">#</a></p><p class="src"><a href="#v:reader">reader</a> :: (<a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:reader" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:MonadError:11"></span> <a href="../mtl-2.2.2/Control-Monad-Error-Class.html#t:MonadError" title="Control.Monad.Error.Class">MonadError</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-187" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:MonadError:11"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:throwError">throwError</a> :: <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:throwError" class="selflink">#</a></p><p class="src"><a href="#v:catchError">catchError</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; (<a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:catchError" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Transaction:StM:12"></span> <span class="keyword">type</span> <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:StM" title="Control.Monad.Trans.Control">StM</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a</span> <a href="src/FoundationDB.Transaction.html#line-193" class="link">Source</a> <a href="#t:Transaction" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Transaction:StM:12"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="src"><span class="keyword">type</span> <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:StM" title="Control.Monad.Trans.Control">StM</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a = <a href="../monad-control-1.0.2.3/Control-Monad-Trans-Control.html#t:StM" title="Control.Monad.Trans.Control">StM</a> (<a href="../mtl-2.2.2/Control-Monad-Reader.html#t:ReaderT" title="Control.Monad.Reader">ReaderT</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> (<a href="../mtl-2.2.2/Control-Monad-Except.html#t:ExceptT" title="Control.Monad.Except">ExceptT</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a>)) a</div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:runTransaction" class="def">runTransaction</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a <a href="src/FoundationDB.Transaction.html#runTransaction" class="link">Source</a> <a href="#v:runTransaction" class="selflink">#</a></p><div class="doc"><p>Attempts to commit a transaction against the given database. If an
 unretryable error occurs, throws an <code><a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a></code>. Attempts to retry the
 transaction for retryable errors.</p></div></div><div class="top"><p class="src"><a id="v:runTransaction-39-" class="def">runTransaction'</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a) <a href="src/FoundationDB.Transaction.html#runTransaction%27" class="link">Source</a> <a href="#v:runTransaction-39-" class="selflink">#</a></p><div class="doc"><p>Like <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code>, but returns a sum instead of throwing an exception
 on errors.</p></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:TransactionConfig" class="def">TransactionConfig</a> <a href="src/FoundationDB.Transaction.html#TransactionConfig" class="link">Source</a> <a href="#t:TransactionConfig" class="selflink">#</a></p><div class="doc"><p>Contains useful options that are not directly exposed by the C API (for
   options that are, see <code><a href="FoundationDB-Transaction.html#v:setOption" title="FoundationDB.Transaction">setOption</a></code>).</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:TransactionConfig" class="def">TransactionConfig</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div class="subs fields"><p class="caption">Fields</p><ul><li><dfn class="src"><a id="v:idempotent" class="def">idempotent</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></dfn><div class="doc"><p>When set to <code><a href="../base-4.14.1.0/Data-Bool.html#v:True" title="Data.Bool">True</a></code> (default is <code><a href="../base-4.14.1.0/Data-Bool.html#v:False" title="Data.Bool">False</a></code>), running the transaction will
 retry even on errors where the transaction may have completed successfully.
 When <code><a href="../base-4.14.1.0/Data-Bool.html#v:False" title="Data.Bool">False</a></code>, the transaction will retry only when it is guaranteed that
 the transaction was not committed.</p></div></li><li><dfn class="src"><a id="v:snapshotReads" class="def">snapshotReads</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></dfn><div class="doc"><p>When set to <code><a href="../base-4.14.1.0/Data-Bool.html#v:True" title="Data.Bool">True</a></code> (default is <code><a href="../base-4.14.1.0/Data-Bool.html#v:False" title="Data.Bool">False</a></code>), reads will see the effects of
 concurrent transactions, removing the default serializable isolation
 guarantee. To enable this feature selectively within a transaction,
 see <code><a href="FoundationDB-Transaction.html#v:withSnapshot" title="FoundationDB.Transaction">withSnapshot</a></code>.</p></div></li><li><dfn class="src"><a id="v:getConflictingKeys" class="def">getConflictingKeys</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></dfn><div class="doc"><p>When set to <code><a href="../base-4.14.1.0/Data-Bool.html#v:True" title="Data.Bool">True</a></code> (default is <code><a href="../base-4.14.1.0/Data-Bool.html#v:False" title="Data.Bool">False</a></code>), if a transaction fails due to
 a conflict, the returned <code>NotCommittedException</code> will include a list of
 key ranges that caused the transaction to conflict. This has a
 performance impact on both the client and the cluster. Only
 supported on clients and clusters running v 6.3 and later. On earlier
 versions, the list will always be empty.</p></div></li><li><dfn class="src"><a id="v:maxRetries" class="def">maxRetries</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></dfn><div class="doc"><p>Max number of times to retry retryable errors. After this many retries,
 <code><a href="FoundationDB-Error-Internal.html#v:MaxRetriesExceeded" title="FoundationDB.Error.Internal">MaxRetriesExceeded</a></code> will be thrown to the caller of <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code>.</p></div></li><li><dfn class="src"><a id="v:timeout" class="def">timeout</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></dfn><div class="doc"><p>Max number of milliseconds the transaction is allowed to run. If this
 number is exceeded, the transaction fails with an error.</p></div></li></ul></div></td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:TransactionConfig">Instances</h4><details id="i:TransactionConfig" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionConfig:Eq:1"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></span> <a href="src/FoundationDB.Transaction.html#line-646" class="link">Source</a> <a href="#t:TransactionConfig" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionConfig:Eq:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionConfig:Ord:2"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></span> <a href="src/FoundationDB.Transaction.html#line-646" class="link">Source</a> <a href="#t:TransactionConfig" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionConfig:Ord:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionConfig:Read:3"></span> <a href="../base-4.14.1.0/Text-Read.html#t:Read" title="Text.Read">Read</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></span> <a href="src/FoundationDB.Transaction.html#line-646" class="link">Source</a> <a href="#t:TransactionConfig" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionConfig:Read:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:readsPrec">readsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="../base-4.14.1.0/Text-ParserCombinators-ReadP.html#t:ReadS" title="Text.ParserCombinators.ReadP">ReadS</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> <a href="#v:readsPrec" class="selflink">#</a></p><p class="src"><a href="#v:readList">readList</a> :: <a href="../base-4.14.1.0/Text-ParserCombinators-ReadP.html#t:ReadS" title="Text.ParserCombinators.ReadP">ReadS</a> [<a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a>] <a href="#v:readList" class="selflink">#</a></p><p class="src"><a href="#v:readPrec">readPrec</a> :: <a href="../base-4.14.1.0/Text-ParserCombinators-ReadPrec.html#t:ReadPrec" title="Text.ParserCombinators.ReadPrec">ReadPrec</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> <a href="#v:readPrec" class="selflink">#</a></p><p class="src"><a href="#v:readListPrec">readListPrec</a> :: <a href="../base-4.14.1.0/Text-ParserCombinators-ReadPrec.html#t:ReadPrec" title="Text.ParserCombinators.ReadPrec">ReadPrec</a> [<a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a>] <a href="#v:readListPrec" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionConfig:Show:4"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></span> <a href="src/FoundationDB.Transaction.html#line-646" class="link">Source</a> <a href="#t:TransactionConfig" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionConfig:Show:4"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:defaultConfig" class="def">defaultConfig</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> <a href="src/FoundationDB.Transaction.html#defaultConfig" class="link">Source</a> <a href="#v:defaultConfig" class="selflink">#</a></p><div class="doc"><p>A config for a non-idempotent transaction, allowing 5 retries, with a time
 limit of 500 milliseconds.</p></div></div><div class="top"><p class="src"><a id="v:runTransactionWithConfig" class="def">runTransactionWithConfig</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> a <a href="src/FoundationDB.Transaction.html#runTransactionWithConfig" class="link">Source</a> <a href="#v:runTransactionWithConfig" class="selflink">#</a></p><div class="doc"><p>Attempt to commit a transaction against the given database. If an
 unretryable error occurs, throws an <code><a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a></code>. Attempts to retry the
 transaction for retryable errors according to the <code><a href="FoundationDB-Transaction.html#v:maxRetries" title="FoundationDB.Transaction">maxRetries</a></code> setting
 in the provided <code><a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:runTransactionWithConfig-39-" class="def">runTransactionWithConfig'</a> :: <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a) <a href="src/FoundationDB.Transaction.html#runTransactionWithConfig%27" class="link">Source</a> <a href="#v:runTransactionWithConfig-39-" class="selflink">#</a></p><div class="doc"><p>Attempt to commit a transaction against the given database. If an unretryable
 error occurs, returns <code><a href="../base-4.14.1.0/Data-Either.html#v:Left" title="Data.Either">Left</a></code>. Attempts to retry the transaction for retryable
 errors.</p></div></div><div class="top"><p class="src"><a id="v:cancel" class="def">cancel</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#cancel" class="link">Source</a> <a href="#v:cancel" class="selflink">#</a></p><div class="doc"><p>Cancel a transaction. The transaction will not be committed, and
 will throw <code><a href="FoundationDB-Error-Internal.html#v:TransactionCanceled" title="FoundationDB.Error.Internal">TransactionCanceled</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:reset" class="def">reset</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#reset" class="link">Source</a> <a href="#v:reset" class="selflink">#</a></p><div class="doc"><p>Reset the transaction. All operations prior to this will be discarded.</p></div></div><div class="top"><p class="src"><a id="v:withSnapshot" class="def">withSnapshot</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="src/FoundationDB.Transaction.html#withSnapshot" class="link">Source</a> <a href="#v:withSnapshot" class="selflink">#</a></p><div class="doc"><p>Runs a transaction using snapshot reads, which means that the transaction
 will see the results of concurrent transactions, removing the default
 serializable isolation guarantee.</p></div></div><div class="top"><p class="src"><a id="v:setOption" class="def">setOption</a> :: <a href="FoundationDB-Options-TransactionOption.html#t:TransactionOption" title="FoundationDB.Options.TransactionOption">TransactionOption</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#setOption" class="link">Source</a> <a href="#v:setOption" class="selflink">#</a></p><div class="doc"><p>Set one of the transaction options from the underlying C API.</p></div></div><div class="top"><p class="src"><a id="v:getReadVersion" class="def">getReadVersion</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a>) <a href="src/FoundationDB.Transaction.html#getReadVersion" class="link">Source</a> <a href="#v:getReadVersion" class="selflink">#</a></p><div class="doc"><p>Gets the read version of the current transaction, representing all
 transactions that were reported committed before this one.</p></div></div><div class="top"><p class="src"><a id="v:setReadVersion" class="def">setReadVersion</a> :: <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#setReadVersion" class="link">Source</a> <a href="#v:setReadVersion" class="selflink">#</a></p><div class="doc"><p>Sets the read version on the current transaction. As the FoundationDB docs
 state, &quot;this is not needed in simple cases&quot;.</p></div></div><div class="top"><p class="src"><a id="v:getVersionstamp" class="def">getVersionstamp</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="FoundationDB-Versionstamp-Internal.html#t:TransactionVersionstamp" title="FoundationDB.Versionstamp.Internal">TransactionVersionstamp</a>)) <a href="src/FoundationDB.Transaction.html#getVersionstamp" class="link">Source</a> <a href="#v:getVersionstamp" class="selflink">#</a></p><div class="doc"><p>Returns a <code><a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a></code> that will resolve to the versionstamp of the committed
 transaction. Most applications won't need this.</p></div></div><div class="top"><p class="src"><a id="v:getApproximateSize" class="def">getApproximateSize</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../base-4.14.1.0/Data-Word.html#t:Word64" title="Data.Word">Word64</a>) <a href="src/FoundationDB.Transaction.html#getApproximateSize" class="link">Source</a> <a href="#v:getApproximateSize" class="selflink">#</a></p><div class="doc"><p>Returns a future that will return the size, in bytes, of the transaction so
 far, as a summation of the estimated size of mutations, read conflict ranges,
 and write conflict ranges. This can be used to decide how to split a large
 task into smaller transactions.</p></div></div><div class="top"><p class="src"><a id="v:get" class="def">get</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> (<a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)) <a href="src/FoundationDB.Transaction.html#get" class="link">Source</a> <a href="#v:get" class="selflink">#</a></p><div class="doc"><p>Get the value of a key. If the key does not exist, returns <code><a href="../base-4.14.1.0/Data-Maybe.html#v:Nothing" title="Data.Maybe">Nothing</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:set" class="def">set</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#set" class="link">Source</a> <a href="#v:set" class="selflink">#</a></p><div class="doc"><p>Set a bytestring key to a bytestring value.</p></div></div><div class="top"><p class="src"><a id="v:clear" class="def">clear</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#clear" class="link">Source</a> <a href="#v:clear" class="selflink">#</a></p><div class="doc"><p>Delete a key from the DB.</p></div></div><div class="top"><p class="src"><a id="v:clearRange" class="def">clearRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#clearRange" class="link">Source</a> <a href="#v:clearRange" class="selflink">#</a></p><div class="doc"><p><code>clearRange k l</code> deletes all keys in the half-open range [k,l).</p></div></div><div class="top"><p class="src"><a id="v:addConflictRange" class="def">addConflictRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#addConflictRange" class="link">Source</a> <a href="#v:addConflictRange" class="selflink">#</a></p><div class="doc"><p>Tells FoundationDB to consider the given range to have been read by this
 transaction.</p></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:FDBConflictRangeType" class="def">FDBConflictRangeType</a> <a href="src/FoundationDB.Internal.Bindings.html#FDBConflictRangeType" class="link">Source</a> <a href="#t:FDBConflictRangeType" class="selflink">#</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:ConflictRangeTypeRead" class="def">ConflictRangeTypeRead</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:ConflictRangeTypeWrite" class="def">ConflictRangeTypeWrite</a></td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:FDBConflictRangeType">Instances</h4><details id="i:FDBConflictRangeType" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBConflictRangeType:Enum:1"></span> <a href="../base-4.14.1.0/Prelude.html#t:Enum" title="Prelude">Enum</a> <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-799" class="link">Source</a> <a href="#t:FDBConflictRangeType" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBConflictRangeType:Enum:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:succ">succ</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> <a href="#v:succ" class="selflink">#</a></p><p class="src"><a href="#v:pred">pred</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> <a href="#v:pred" class="selflink">#</a></p><p class="src"><a href="#v:toEnum">toEnum</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> <a href="#v:toEnum" class="selflink">#</a></p><p class="src"><a href="#v:fromEnum">fromEnum</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> <a href="#v:fromEnum" class="selflink">#</a></p><p class="src"><a href="#v:enumFrom">enumFrom</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a>] <a href="#v:enumFrom" class="selflink">#</a></p><p class="src"><a href="#v:enumFromThen">enumFromThen</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a>] <a href="#v:enumFromThen" class="selflink">#</a></p><p class="src"><a href="#v:enumFromTo">enumFromTo</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a>] <a href="#v:enumFromTo" class="selflink">#</a></p><p class="src"><a href="#v:enumFromThenTo">enumFromThenTo</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a>] <a href="#v:enumFromThenTo" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBConflictRangeType:Eq:2"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-799" class="link">Source</a> <a href="#t:FDBConflictRangeType" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBConflictRangeType:Eq:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBConflictRangeType:Ord:3"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-800" class="link">Source</a> <a href="#t:FDBConflictRangeType" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBConflictRangeType:Ord:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBConflictRangeType:Show:4"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-801" class="link">Source</a> <a href="#t:FDBConflictRangeType" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBConflictRangeType:Show:4"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:FDBConflictRangeType" title="FoundationDB.Transaction">FDBConflictRangeType</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:addReadConflictKey" class="def">addReadConflictKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#addReadConflictKey" class="link">Source</a> <a href="#v:addReadConflictKey" class="selflink">#</a></p><div class="doc"><p>Tells FoundationDB to consider the given key to have been read by this
 transaction.</p></div></div><div class="top"><p class="src"><a id="v:addWriteConflictKey" class="def">addWriteConflictKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#addWriteConflictKey" class="link">Source</a> <a href="#v:addWriteConflictKey" class="selflink">#</a></p><div class="doc"><p>Tells FoundationDB to consider the given key to have been written
 by this transaction.</p></div></div><div class="top"><p class="src"><a id="v:getKey" class="def">getKey</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>) <a href="src/FoundationDB.Transaction.html#getKey" class="link">Source</a> <a href="#v:getKey" class="selflink">#</a></p><div class="doc"><p>Gets the key specified by the given <code>KeySelector</code>.</p></div></div><div class="top"><p class="src"><a id="v:getKeyAddresses" class="def">getKeyAddresses</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> [<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>]) <a href="src/FoundationDB.Transaction.html#getKeyAddresses" class="link">Source</a> <a href="#v:getKeyAddresses" class="selflink">#</a></p><div class="doc"><p>Get the public network addresses of all nodes responsible for storing
 the given key.</p></div></div><div class="top"><p class="src"><a id="v:atomicOp" class="def">atomicOp</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Options-MutationType.html#t:MutationType" title="FoundationDB.Options.MutationType">MutationType</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#atomicOp" class="link">Source</a> <a href="#v:atomicOp" class="selflink">#</a></p><div class="doc"><p>Perform an atomic operation of <code><a href="FoundationDB-Options-MutationType.html#t:MutationType" title="FoundationDB.Options.MutationType">MutationType</a></code> on the given key. A
 transaction that performs only atomic operations is guaranteed not to
 conflict. However, it may cause other concurrent transactions to conflict.</p></div></div><div class="top"><p class="src"><a id="v:getRange" class="def">getRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>) <a href="src/FoundationDB.Transaction.html#getRange" class="link">Source</a> <a href="#v:getRange" class="selflink">#</a></p><div class="doc"><p>Reads all key-value pairs in the specified <code>Range</code> which are
   lexicographically greater than or equal to the <code><a href="FoundationDB-Transaction.html#v:rangeBegin" title="FoundationDB.Transaction">rangeBegin</a></code> <code>KeySelector</code>
   and lexicographically less than the <code><a href="FoundationDB-Transaction.html#v:rangeEnd" title="FoundationDB.Transaction">rangeEnd</a></code> <code>KeySelector</code>.
   Uses <code>StreamingModeIterator</code>, which assumes that you don't know ahead of
   time exactly how many pairs in the range you actually need. If you need
   them all (and they are expected to fit in memory), use <code><a href="FoundationDB-Transaction.html#v:getEntireRange" title="FoundationDB.Transaction">getEntireRange</a></code>.
   For more advanced usage, use <code><a href="FoundationDB-Transaction.html#v:getRange-39-" title="FoundationDB.Transaction">getRange'</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:getRange-39-" class="def">getRange'</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>) <a href="src/FoundationDB.Transaction.html#getRange%27" class="link">Source</a> <a href="#v:getRange-39-" class="selflink">#</a></p><div class="doc"><p>Like <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code>, but allows you to specify the streaming mode as desired.</p></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:FDBStreamingMode" class="def">FDBStreamingMode</a> <a href="src/FoundationDB.Internal.Bindings.html#FDBStreamingMode" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:StreamingModeWantAll" class="def">StreamingModeWantAll</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeIterator" class="def">StreamingModeIterator</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeExact" class="def">StreamingModeExact</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeSmall" class="def">StreamingModeSmall</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeMedium" class="def">StreamingModeMedium</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeLarge" class="def">StreamingModeLarge</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:StreamingModeSerial" class="def">StreamingModeSerial</a></td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:FDBStreamingMode">Instances</h4><details id="i:FDBStreamingMode" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBStreamingMode:Bounded:1"></span> <a href="../base-4.14.1.0/Prelude.html#t:Bounded" title="Prelude">Bounded</a> <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-659" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBStreamingMode:Bounded:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:minBound">minBound</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:minBound" class="selflink">#</a></p><p class="src"><a href="#v:maxBound">maxBound</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:maxBound" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBStreamingMode:Enum:2"></span> <a href="../base-4.14.1.0/Prelude.html#t:Enum" title="Prelude">Enum</a> <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-662" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBStreamingMode:Enum:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:succ">succ</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:succ" class="selflink">#</a></p><p class="src"><a href="#v:pred">pred</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:pred" class="selflink">#</a></p><p class="src"><a href="#v:toEnum">toEnum</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:toEnum" class="selflink">#</a></p><p class="src"><a href="#v:fromEnum">fromEnum</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> <a href="#v:fromEnum" class="selflink">#</a></p><p class="src"><a href="#v:enumFrom">enumFrom</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a>] <a href="#v:enumFrom" class="selflink">#</a></p><p class="src"><a href="#v:enumFromThen">enumFromThen</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a>] <a href="#v:enumFromThen" class="selflink">#</a></p><p class="src"><a href="#v:enumFromTo">enumFromTo</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a>] <a href="#v:enumFromTo" class="selflink">#</a></p><p class="src"><a href="#v:enumFromThenTo">enumFromThenTo</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; [<a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a>] <a href="#v:enumFromThenTo" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBStreamingMode:Eq:3"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-657" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBStreamingMode:Eq:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBStreamingMode:Ord:4"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-658" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBStreamingMode:Ord:4"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FDBStreamingMode:Show:5"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-660" class="link">Source</a> <a href="#t:FDBStreamingMode" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FDBStreamingMode:Show:5"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:getEntireRange" class="def">getEntireRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)) <a href="src/FoundationDB.Transaction.html#getEntireRange" class="link">Source</a> <a href="#v:getEntireRange" class="selflink">#</a></p><div class="doc"><p>Wrapper around <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code> that reads the entire range into memory.</p></div></div><div class="top"><p class="src"><a id="v:getEntireRange-39-" class="def">getEntireRange'</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)) <a href="src/FoundationDB.Transaction.html#getEntireRange%27" class="link">Source</a> <a href="#v:getEntireRange-39-" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:isRangeEmpty" class="def">isRangeEmpty</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="src/FoundationDB.Transaction.html#isRangeEmpty" class="link">Source</a> <a href="#v:isRangeEmpty" class="selflink">#</a></p><div class="doc"><p>Return True iff the given range is empty.</p></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:RangeQuery" class="def">RangeQuery</a> <a href="src/FoundationDB.Transaction.html#RangeQuery" class="link">Source</a> <a href="#t:RangeQuery" class="selflink">#</a></p><div class="doc"><p>Specifies a range of keys to be iterated over by <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code>.</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:RangeQuery" class="def">RangeQuery</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div class="subs fields"><p class="caption">Fields</p><ul><li><dfn class="src"><a id="v:rangeBegin" class="def">rangeBegin</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></dfn><div class="doc"><p>The beginning of the range, including the key specified by this
 <code>KeySelector</code>.</p></div></li><li><dfn class="src"><a id="v:rangeEnd" class="def">rangeEnd</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></dfn><div class="doc"><p>The end of the range, not including the key specified by this
 <code>KeySelector</code>.</p></div></li><li><dfn class="src"><a id="v:rangeLimit" class="def">rangeLimit</a> :: <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a></dfn><div class="doc"><p>If the range contains more than <code>n</code> items, return only <code>Just n</code>.
 If <code>Nothing</code> is provided, returns the entire range.</p></div></li><li><dfn class="src"><a id="v:rangeReverse" class="def">rangeReverse</a> :: <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a></dfn><div class="doc"><p>If <code><a href="../base-4.14.1.0/Data-Bool.html#v:True" title="Data.Bool">True</a></code>, return the range in reverse order.</p></div></li></ul></div></td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:RangeQuery">Instances</h4><details id="i:RangeQuery" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:RangeQuery:Eq:1"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></span> <a href="src/FoundationDB.Transaction.html#line-429" class="link">Source</a> <a href="#t:RangeQuery" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:RangeQuery:Eq:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:RangeQuery:Ord:2"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></span> <a href="src/FoundationDB.Transaction.html#line-429" class="link">Source</a> <a href="#t:RangeQuery" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:RangeQuery:Ord:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:RangeQuery:Show:3"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a></span> <a href="src/FoundationDB.Transaction.html#line-429" class="link">Source</a> <a href="#t:RangeQuery" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:RangeQuery:Show:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:rangeKeys" class="def">rangeKeys</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>) <a href="src/FoundationDB.Transaction.html#rangeKeys" class="link">Source</a> <a href="#v:rangeKeys" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:keyRangeQuery" class="def">keyRangeQuery</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> <a href="src/FoundationDB.Transaction.html#keyRangeQuery" class="link">Source</a> <a href="#v:keyRangeQuery" class="selflink">#</a></p><div class="doc"><p><code>keyRangeQuery begin end</code> is the range of keys <code>[begin, end)</code>.</p></div></div><div class="top"><p class="src"><a id="v:keyRangeQueryInclusive" class="def">keyRangeQueryInclusive</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> <a href="src/FoundationDB.Transaction.html#keyRangeQueryInclusive" class="link">Source</a> <a href="#v:keyRangeQueryInclusive" class="selflink">#</a></p><div class="doc"><p><code>keyRangeQuery begin end</code> is the range of keys <code>[begin, end]</code>.</p></div></div><div class="top"><p class="src"><a id="v:prefixRange" class="def">prefixRange</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> <a href="src/FoundationDB.Transaction.html#prefixRange" class="link">Source</a> <a href="#v:prefixRange" class="selflink">#</a></p><div class="doc"><p><code>prefixRange prefix</code> is the range of all keys of which <code>prefix</code> is a
   prefix. Returns <code>Nothing</code> if <code>prefix</code> is empty or contains only <code>0xff</code>.</p></div></div><div class="top"><p class="src"><a id="v:prefixRangeEnd" class="def">prefixRangeEnd</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="../base-4.14.1.0/Data-Maybe.html#t:Maybe" title="Data.Maybe">Maybe</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> <a href="src/FoundationDB.Transaction.html#prefixRangeEnd" class="link">Source</a> <a href="#v:prefixRangeEnd" class="selflink">#</a></p></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:RangeResult" class="def">RangeResult</a> <a href="src/FoundationDB.Transaction.html#RangeResult" class="link">Source</a> <a href="#t:RangeResult" class="selflink">#</a></p><div class="doc"><p>Structure for returning the result of <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code> in chunks.</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:RangeDone" class="def">RangeDone</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>))</td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:RangeMore" class="def">RangeMore</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> (<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)) (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>)</td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:RangeResult">Instances</h4><details id="i:RangeResult" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:RangeResult:Show:1"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a></span> <a href="src/FoundationDB.Transaction.html#line-462" class="link">Source</a> <a href="#t:RangeResult" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:RangeResult:Show:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:RangeResult" title="FoundationDB.Transaction">RangeResult</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:watch" class="def">watch</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> ()) <a href="src/FoundationDB.Transaction.html#watch" class="link">Source</a> <a href="#v:watch" class="selflink">#</a></p><div class="doc"><p>Creates a future that will be fulfilled when the value
 associated with the given key is changed, relative to the value
 it had as of the current transaction's read version, or the last
 value to which the key was previously set within the current
 transaction. This future is safe to return from the transaction
 and await in IO. If the transaction in which it was created
 fails to commit, awaiting it will return the same error as
 running the transaction did.</p></div></div><a href="#g:2" id="g:2"><h1>Mapped ranges</h1></a><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:MappedKeyValue" class="def">MappedKeyValue</a> <a href="src/FoundationDB.Internal.Bindings.html#MappedKeyValue" class="link">Source</a> <a href="#t:MappedKeyValue" class="selflink">#</a></p><div class="doc"><p>The result of a mapped key value query, containing the
 parent key and value (i.e., the key and value in the secondary index),
 and the range of key-value pairs retrieved based on the range query
 generated from the mapper's operation on the parent key and value.</p><p>WARNING: FDB's docs warn that the returned KeySelector fields have not yet
 been tested. Use them at your own risk!</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:MappedKeyValue" class="def">MappedKeyValue</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div class="subs fields"><p class="caption">Fields</p><ul><li><dfn class="src"><a id="v:parentKey" class="def">parentKey</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></dfn><div class="doc empty">&nbsp;</div></li><li><dfn class="src"><a id="v:parentValue" class="def">parentValue</a> :: <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></dfn><div class="doc empty">&nbsp;</div></li><li><dfn class="src"><a id="v:mappedKeySelectorBegin" class="def">mappedKeySelectorBegin</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></dfn><div class="doc empty">&nbsp;</div></li><li><dfn class="src"><a id="v:mappedKeySelectorEnd" class="def">mappedKeySelectorEnd</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></dfn><div class="doc empty">&nbsp;</div></li><li><dfn class="src"><a id="v:mappedKeyValues" class="def">mappedKeyValues</a> :: [(<a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>, <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a>)]</dfn><div class="doc empty">&nbsp;</div></li></ul></div></td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:MappedKeyValue">Instances</h4><details id="i:MappedKeyValue" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:MappedKeyValue:Eq:1"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-334" class="link">Source</a> <a href="#t:MappedKeyValue" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:MappedKeyValue:Eq:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:MappedKeyValue:Show:2"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-334" class="link">Source</a> <a href="#t:MappedKeyValue" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:MappedKeyValue:Show:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:MappedRangeResult" class="def">MappedRangeResult</a> <a href="src/FoundationDB.Transaction.html#MappedRangeResult" class="link">Source</a> <a href="#t:MappedRangeResult" class="selflink">#</a></p><div class="doc"><p>Structure for returning the result of <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code> in chunks.</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:MappedRangeDone" class="def">MappedRangeDone</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>)</td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:MappedRangeMore" class="def">MappedRangeMore</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>) (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>)</td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:MappedRangeResult">Instances</h4><details id="i:MappedRangeResult" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:MappedRangeResult:Show:1"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a></span> <a href="src/FoundationDB.Transaction.html#line-531" class="link">Source</a> <a href="#t:MappedRangeResult" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:MappedRangeResult:Show:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><span class="keyword">newtype</span> <a id="t:Mapper" class="def">Mapper</a> <a href="src/FoundationDB.Transaction.html#Mapper" class="link">Source</a> <a href="#t:Mapper" class="selflink">#</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:Mapper" class="def">Mapper</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:Mapper">Instances</h4><details id="i:Mapper" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Mapper:Eq:1"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a></span> <a href="src/FoundationDB.Transaction.html#line-534" class="link">Source</a> <a href="#t:Mapper" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Mapper:Eq:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Mapper:Ord:2"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a></span> <a href="src/FoundationDB.Transaction.html#line-534" class="link">Source</a> <a href="#t:Mapper" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Mapper:Ord:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Mapper:Show:3"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a></span> <a href="src/FoundationDB.Transaction.html#line-534" class="link">Source</a> <a href="#t:Mapper" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Mapper:Show:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:getMappedRange" class="def">getMappedRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>) <a href="src/FoundationDB.Transaction.html#getMappedRange" class="link">Source</a> <a href="#v:getMappedRange" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:getMappedRange-39-" class="def">getMappedRange'</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> <a href="FoundationDB-Transaction.html#t:MappedRangeResult" title="FoundationDB.Transaction">MappedRangeResult</a>) <a href="src/FoundationDB.Transaction.html#getMappedRange%27" class="link">Source</a> <a href="#v:getMappedRange-39-" class="selflink">#</a></p><div class="doc"><p>Given a range of keys in a secondary index, fetc the corresponding
 key/values they refer to by using a mapper.
 See <a href="https://github.com/apple/foundationdb/wiki/Everything-about-GetMappedRange">the docs</a>
 for more information.</p><p>Important: you must have read-your-writes enabled, but you must not read
 anything you have written in the same transaction. Snapshot isolation is not
 supported. See the docs linked above.</p><p>These functions are only available for FDB &gt;= 7.1</p></div></div><div class="top"><p class="src"><a id="v:getEntireMappedRange" class="def">getEntireMappedRange</a> :: <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>) <a href="src/FoundationDB.Transaction.html#getEntireMappedRange" class="link">Source</a> <a href="#v:getEntireMappedRange" class="selflink">#</a></p><div class="doc"><p>Wrapper around <code><a href="FoundationDB-Transaction.html#v:getRange" title="FoundationDB.Transaction">getRange</a></code> that reads the entire range into memory.</p></div></div><div class="top"><p class="src"><a id="v:getEntireMappedRange-39-" class="def">getEntireMappedRange'</a> :: <a href="FoundationDB-Transaction.html#t:FDBStreamingMode" title="FoundationDB.Transaction">FDBStreamingMode</a> -&gt; <a href="FoundationDB-Transaction.html#t:RangeQuery" title="FoundationDB.Transaction">RangeQuery</a> -&gt; <a href="FoundationDB-Transaction.html#t:Mapper" title="FoundationDB.Transaction">Mapper</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="../containers-0.6.2.1/Data-Sequence.html#t:Seq" title="Data.Sequence">Seq</a> <a href="FoundationDB-Transaction.html#t:MappedKeyValue" title="FoundationDB.Transaction">MappedKeyValue</a>) <a href="src/FoundationDB.Transaction.html#getEntireMappedRange%27" class="link">Source</a> <a href="#v:getEntireMappedRange-39-" class="selflink">#</a></p></div><a href="#g:3" id="g:3"><h1>Futures</h1></a><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:Future" class="def">Future</a> a <a href="src/FoundationDB.Transaction.html#Future" class="link">Source</a> <a href="#t:Future" class="selflink">#</a></p><div class="doc"><p>A future result of a FoundationDB call. You can block on a future with
 <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code>.
 WARNING: returning a value of this type from <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code> and then
 calling <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code> on the value in another transaction will cause a segfault!
 Future versions of this library may use more sophisticated types to prevent
 this.</p></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:Future">Instances</h4><details id="i:Future" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Future:Functor:1"></span> <a href="../base-4.14.1.0/Data-Functor.html#t:Functor" title="Data.Functor">Functor</a> <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a></span> <a href="src/FoundationDB.Transaction.html#line-215" class="link">Source</a> <a href="#t:Future" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Future:Functor:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:fmap">fmap</a> :: (a -&gt; b) -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b <a href="#v:fmap" class="selflink">#</a></p><p class="src"><a href="#v:-60--36-">(&lt;$)</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a <a href="#v:-60--36-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Future:Applicative:2"></span> <a href="../base-4.14.1.0/Control-Applicative.html#t:Applicative" title="Control.Applicative">Applicative</a> <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a></span> <a href="src/FoundationDB.Transaction.html#line-219" class="link">Source</a> <a href="#t:Future" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Future:Applicative:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:pure">pure</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a <a href="#v:pure" class="selflink">#</a></p><p class="src"><a href="#v:-60--42--62-">(&lt;*&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> (a -&gt; b) -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b <a href="#v:-60--42--62-" class="selflink">#</a></p><p class="src"><a href="#v:liftA2">liftA2</a> :: (a -&gt; b -&gt; c) -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> c <a href="#v:liftA2" class="selflink">#</a></p><p class="src"><a href="#v:-42--62-">(*&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b <a href="#v:-42--62-" class="selflink">#</a></p><p class="src"><a href="#v:-60--42-">(&lt;*)</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> b -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a <a href="#v:-60--42-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:Future:Show:3"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> a =&gt; <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a)</span> <a href="src/FoundationDB.Transaction.html#line-211" class="link">Source</a> <a href="#t:Future" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:Future:Show:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:await" class="def">await</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="src/FoundationDB.Transaction.html#await" class="link">Source</a> <a href="#v:await" class="selflink">#</a></p><div class="doc"><p>Block until a future is ready. Unfortunately, does not seem to be
 interruptible by SIGPIPE (the interrupt sent by Control.Conccurent.Async to
 cancel), even when using InterruptibleFFI.</p></div></div><div class="top"><p class="src"><a id="v:awaitInterruptible" class="def">awaitInterruptible</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="src/FoundationDB.Transaction.html#awaitInterruptible" class="link">Source</a> <a href="#v:awaitInterruptible" class="selflink">#</a></p><div class="doc"><p>Polls a future for readiness roughly every millisecond in a loop until it
 is ready, then returns the value in the future. This is less resource
 efficient than <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code>, but can be interrupted more easily.</p></div></div><div class="top"><p class="src"><a id="v:cancelFuture" class="def">cancelFuture</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#cancelFuture" class="link">Source</a> <a href="#v:cancelFuture" class="selflink">#</a></p><div class="doc"><p>Cancel a future. Attempting to await the future after cancellation will
 throw <code><a href="FoundationDB-Error-Internal.html#v:OperationCancelled" title="FoundationDB.Error.Internal">OperationCancelled</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:futureIsReady" class="def">futureIsReady</a> :: <a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="src/FoundationDB.Transaction.html#futureIsReady" class="link">Source</a> <a href="#v:futureIsReady" class="selflink">#</a></p><div class="doc"><p>Returns True if the future is ready. If so, calling <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code> will not block.</p></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:FutureIO" class="def">FutureIO</a> a <a href="src/FoundationDB.Transaction.html#FutureIO" class="link">Source</a> <a href="#t:FutureIO" class="selflink">#</a></p><div class="doc"><p>A future that can only be awaited after its transaction has committed.
 That is, in contrast to <code><a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a></code>, this <strong>must</strong> be returned from
 <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code> before it can safely be awaited. Use <code><a href="FoundationDB-Transaction.html#v:awaitIO" title="FoundationDB.Transaction">awaitIO</a></code> to await it.
 This future type is not needed frequently.</p><p>All <code><a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a></code> functions work similarly to their <code><a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a></code> counterparts.</p></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:FutureIO">Instances</h4><details id="i:FutureIO" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FutureIO:Functor:1"></span> <a href="../base-4.14.1.0/Data-Functor.html#t:Functor" title="Data.Functor">Functor</a> <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a></span> <a href="src/FoundationDB.Transaction.html#line-298" class="link">Source</a> <a href="#t:FutureIO" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FutureIO:Functor:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:fmap">fmap</a> :: (a -&gt; b) -&gt; <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> b <a href="#v:fmap" class="selflink">#</a></p><p class="src"><a href="#v:-60--36-">(&lt;$)</a> :: a -&gt; <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> b -&gt; <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a <a href="#v:-60--36-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:FutureIO:Show:2"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> (<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a)</span> <a href="src/FoundationDB.Transaction.html#line-295" class="link">Source</a> <a href="#t:FutureIO" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:FutureIO:Show:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:awaitIO" class="def">awaitIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a) <a href="src/FoundationDB.Transaction.html#awaitIO" class="link">Source</a> <a href="#v:awaitIO" class="selflink">#</a></p><div class="doc"><p>IO analogue to <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:awaitInterruptibleIO" class="def">awaitInterruptibleIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a) <a href="src/FoundationDB.Transaction.html#awaitInterruptibleIO" class="link">Source</a> <a href="#v:awaitInterruptibleIO" class="selflink">#</a></p><div class="doc"><p>IO analogue to <code><a href="FoundationDB-Transaction.html#v:awaitInterruptible" title="FoundationDB.Transaction">awaitInterruptible</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:cancelFutureIO" class="def">cancelFutureIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> () <a href="src/FoundationDB.Transaction.html#cancelFutureIO" class="link">Source</a> <a href="#v:cancelFutureIO" class="selflink">#</a></p><div class="doc"><p>Cancel a future. Attempts to await the future after cancellation will throw
 <code><a href="FoundationDB-Error-Internal.html#v:OperationCancelled" title="FoundationDB.Error.Internal">OperationCancelled</a></code>.</p></div></div><div class="top"><p class="src"><a id="v:futureIsReadyIO" class="def">futureIsReadyIO</a> :: <a href="FoundationDB-Transaction.html#t:FutureIO" title="FoundationDB.Transaction">FutureIO</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="src/FoundationDB.Transaction.html#futureIsReadyIO" class="link">Source</a> <a href="#v:futureIsReadyIO" class="selflink">#</a></p><div class="doc"><p>Returns <code><a href="../base-4.14.1.0/Data-Bool.html#v:True" title="Data.Bool">True</a></code> if calling <code><a href="FoundationDB-Transaction.html#v:awaitIO" title="FoundationDB.Transaction">awaitIO</a></code> will return immediately, without
 blocking.</p></div></div><a href="#g:4" id="g:4"><h1>Key selectors</h1></a><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:KeySelector" class="def">KeySelector</a> <a href="src/FoundationDB.Internal.Bindings.html#KeySelector" class="link">Source</a> <a href="#t:KeySelector" class="selflink">#</a></p><div class="doc"><p>Specifies a key in the database. See the official
 <a href="https://apple.github.io/foundationdb/developer-guide.html#key-selectors">docs</a>
 for more information. These can be supplied to <code>getKey</code> or used to build a
 <code>Range</code>.</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:LastLessThan" class="def">LastLessThan</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></td><td class="doc"><p>Selects the lexicographically greatest key less than the specified key.</p></td></tr><tr><td class="src"><a id="v:LastLessOrEq" class="def">LastLessOrEq</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></td><td class="doc"><p>Selects the lexicographically greatest less than or equal to the
 specified key.</p></td></tr><tr><td class="src"><a id="v:FirstGreaterThan" class="def">FirstGreaterThan</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></td><td class="doc"><p>Selects the lexicographically least key greater than the specified key.</p></td></tr><tr><td class="src"><a id="v:FirstGreaterOrEq" class="def">FirstGreaterOrEq</a> <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a></td><td class="doc"><p>Selects the lexicographically least key greater than or equal to the
 specified key.</p></td></tr></table></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:KeySelector">Instances</h4><details id="i:KeySelector" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:KeySelector:Eq:1"></span> <a href="../base-4.14.1.0/Data-Eq.html#t:Eq" title="Data.Eq">Eq</a> <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-607" class="link">Source</a> <a href="#t:KeySelector" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:KeySelector:Eq:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:-61--61-">(==)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-61--61-" class="selflink">#</a></p><p class="src"><a href="#v:-47--61-">(/=)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-47--61-" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:KeySelector:Ord:2"></span> <a href="../base-4.14.1.0/Data-Ord.html#t:Ord" title="Data.Ord">Ord</a> <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-607" class="link">Source</a> <a href="#t:KeySelector" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:KeySelector:Ord:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:compare">compare</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Ord.html#t:Ordering" title="Data.Ord">Ordering</a> <a href="#v:compare" class="selflink">#</a></p><p class="src"><a href="#v:-60-">(&lt;)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60-" class="selflink">#</a></p><p class="src"><a href="#v:-60--61-">(&lt;=)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-60--61-" class="selflink">#</a></p><p class="src"><a href="#v:-62-">(&gt;)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62-" class="selflink">#</a></p><p class="src"><a href="#v:-62--61-">(&gt;=)</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-Bool.html#t:Bool" title="Data.Bool">Bool</a> <a href="#v:-62--61-" class="selflink">#</a></p><p class="src"><a href="#v:max">max</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> <a href="#v:max" class="selflink">#</a></p><p class="src"><a href="#v:min">min</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> <a href="#v:min" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:KeySelector:Show:3"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a></span> <a href="src/FoundationDB.Internal.Bindings.html#line-607" class="link">Source</a> <a href="#t:KeySelector" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:KeySelector:Show:3"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Internal-Bindings.html">FoundationDB.Internal.Bindings</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:keySelectorBytes" class="def">keySelectorBytes</a> :: <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="../bytestring-0.10.12.0/Data-ByteString.html#t:ByteString" title="Data.ByteString">ByteString</a> <a href="src/FoundationDB.Internal.Bindings.html#keySelectorBytes" class="link">Source</a> <a href="#v:keySelectorBytes" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:offset" class="def">offset</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> -&gt; <a href="FoundationDB-Transaction.html#t:KeySelector" title="FoundationDB.Transaction">KeySelector</a> <a href="src/FoundationDB.Transaction.html#offset" class="link">Source</a> <a href="#v:offset" class="selflink">#</a></p><div class="doc"><p>Increase the offset of the given <code>KeySelector</code>.</p></div></div><a href="#g:5" id="g:5"><h1>Advanced Usage</h1></a><div class="doc"><p>The functionality in this section is for more advanced use cases where you
   need to be able to refer to an in-progress transaction and add operations to
   it incrementally. This is similar to how the Python bindings work -- you
   pass around a transaction object and call methods on it one by one before
   finally calling <code>.commit()</code>.</p><p>This functionality was needed to create the bindings tester, which is
   required to follow the semantics of the bindings for imperative languages
   more closely. You probably don't need this. In fact, it's not entirely clear
   that the bindings tester needs it.</p></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:TransactionEnv" class="def">TransactionEnv</a> <a href="src/FoundationDB.Transaction.html#TransactionEnv" class="link">Source</a> <a href="#t:TransactionEnv" class="selflink">#</a></p><div class="doc"><p>The internal state of a transaction as it is being executed by
 <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code>.</p></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:TransactionEnv">Instances</h4><details id="i:TransactionEnv" open="open"><summary class="hide-when-js-enabled">Instances details</summary><table><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionEnv:Show:1"></span> <a href="../base-4.14.1.0/Text-Show.html#t:Show" title="Text.Show">Show</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a></span> <a href="src/FoundationDB.Transaction.html#line-847" class="link">Source</a> <a href="#t:TransactionEnv" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionEnv:Show:1"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:showsPrec">showsPrec</a> :: <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showsPrec" class="selflink">#</a></p><p class="src"><a href="#v:show">show</a> :: <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="../base-4.14.1.0/Data-String.html#t:String" title="Data.String">String</a> <a href="#v:show" class="selflink">#</a></p><p class="src"><a href="#v:showList">showList</a> :: [<a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a>] -&gt; <a href="../base-4.14.1.0/Text-Show.html#t:ShowS" title="Text.Show">ShowS</a> <a href="#v:showList" class="selflink">#</a></p></div></details></td></tr><tr><td class="src clearfix"><span class="inst-left"><span class="instance details-toggle-control details-toggle" data-details-id="i:id:TransactionEnv:MonadReader:2"></span> <a href="../mtl-2.2.2/Control-Monad-Reader-Class.html#t:MonadReader" title="Control.Monad.Reader.Class">MonadReader</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a></span> <a href="src/FoundationDB.Transaction.html#line-189" class="link">Source</a> <a href="#t:TransactionEnv" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><details id="i:id:TransactionEnv:MonadReader:2"><summary class="hide-when-js-enabled">Instance details</summary><p>Defined in <a href="FoundationDB-Transaction.html">FoundationDB.Transaction</a></p> <div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:ask">ask</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> <a href="#v:ask" class="selflink">#</a></p><p class="src"><a href="#v:local">local</a> :: (<a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a>) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:local" class="selflink">#</a></p><p class="src"><a href="#v:reader">reader</a> :: (<a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; a) -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a <a href="#v:reader" class="selflink">#</a></p></div></details></td></tr></table></details></div></div><div class="top"><p class="src"><a id="v:createTransactionEnv" class="def">createTransactionEnv</a> :: <a href="FoundationDB-Internal-Database.html#t:Database" title="FoundationDB.Internal.Database">Database</a> -&gt; <a href="FoundationDB-Transaction.html#t:TransactionConfig" title="FoundationDB.Transaction">TransactionConfig</a> -&gt; <a href="../mtl-2.2.2/Control-Monad-Except.html#t:ExceptT" title="Control.Monad.Except">ExceptT</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> <a href="src/FoundationDB.Transaction.html#createTransactionEnv" class="link">Source</a> <a href="#v:createTransactionEnv" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:onEnv" class="def">onEnv</a> :: <a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> a -&gt; <a href="../base-4.14.1.0/System-IO.html#t:IO" title="System.IO">IO</a> (<a href="../base-4.14.1.0/Data-Either.html#t:Either" title="Data.Either">Either</a> <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> a) <a href="src/FoundationDB.Transaction.html#onEnv" class="link">Source</a> <a href="#v:onEnv" class="selflink">#</a></p><div class="doc"><p>Execute a transactional action on an existing transaction environment.</p></div></div><div class="top"><p class="src"><a id="v:commitFuture" class="def">commitFuture</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> (<a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a> ()) <a href="src/FoundationDB.Transaction.html#commitFuture" class="link">Source</a> <a href="#v:commitFuture" class="selflink">#</a></p><div class="doc"><p>Attempts to commit a transaction. If <code><a href="FoundationDB-Transaction.html#v:await" title="FoundationDB.Transaction">await</a></code>ing the returned <code><a href="FoundationDB-Transaction.html#t:Future" title="FoundationDB.Transaction">Future</a></code>
 works without errors, the transaction was committed.</p></div></div><div class="top"><p class="src"><a id="v:onError" class="def">onError</a> :: <a href="FoundationDB-Error-Internal.html#t:Error" title="FoundationDB.Error.Internal">Error</a> -&gt; <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> () <a href="src/FoundationDB.Transaction.html#onError" class="link">Source</a> <a href="#v:onError" class="selflink">#</a></p><div class="doc"><p>Calls the C API's <code>fdb_transaction_on_error</code> function. Re-raises
 unretryable errors.</p></div></div><div class="top"><p class="src"><a id="v:getCommittedVersion" class="def">getCommittedVersion</a> :: <a href="FoundationDB-Transaction.html#t:Transaction" title="FoundationDB.Transaction">Transaction</a> <a href="../base-4.14.1.0/Data-Int.html#t:Int" title="Data.Int">Int</a> <a href="src/FoundationDB.Transaction.html#getCommittedVersion" class="link">Source</a> <a href="#v:getCommittedVersion" class="selflink">#</a></p><div class="doc"><p>Gets the committed version of a transaction. Can only be called after the
 transaction has committed, so must be used in conjunction with
 <code><a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a></code>, since <code><a href="FoundationDB-Transaction.html#v:runTransaction" title="FoundationDB.Transaction">runTransaction</a></code> and its variants immediately destroy
 the internal <code><a href="FoundationDB-Transaction.html#t:TransactionEnv" title="FoundationDB.Transaction">TransactionEnv</a></code> as soon as they return.</p></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.24.0</p></div></body></html>