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percona_server_views.html
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percona_server_views.html
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<!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" />
<title>percona_server_views: common_schema documentation</title>
<meta name="description" content="percona_server_views: common_schema" />
<meta name="keywords" content="percona_server_views: common_schema" />
<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
<div id="main">
<div id="header">
<h1>common_schema</h1> <strong>2.2</strong> documentation
<div class="subtitle">DBA's framework for MySQL</div>
</div>
<div id="contentwrapper">
<div id="content">
<h2><a href="percona_server_views.html">percona_server_views</a></h2>
<h3>SYNOPSIS</h3>
<p>
Percona server views: views enhancing INFORMATION_SCHEMA tables available in Percona Server.
<ul>
<li><a title="innodb_index_rows" href="innodb_index_rows.html">innodb_index_rows</a>: number of row cardinality per keys per columns in InnoDB tables</li>
<li><a title="innodb_index_stats" href="innodb_index_stats.html">innodb_index_stats</a>: estimated InnoDB depth & split factor of key's B+ Tree</li>
</ul>
</p>
<h3>DESCRIPTION</h3>
<p>
These views rely on the INNODB_INDEX_STATS feature to be enabled.
The views are compatible with recent versions of Percona Server (due to changes to INNODB_INDEX_STATS
schema in Percona Server 5.5.8, these views are incompatible with earlier versions).
</p>
<h3>EXAMPLES</h3>
<p>Examine keys selectivity/cardinality on a specific table:</p>
<blockquote><pre>mysql> SELECT * FROM common_schema.innodb_index_rows WHERE TABLE_SCHEMA='sakila' AND TABLE_NAME='inventory';
+--------------+------------+----------------------+--------------+--------------+-------------------------+-------------------------+
| TABLE_SCHEMA | TABLE_NAME | INDEX_NAME | SEQ_IN_INDEX | COLUMN_NAME | is_last_column_in_index | incremental_row_per_key |
+--------------+------------+----------------------+--------------+--------------+-------------------------+-------------------------+
| sakila | inventory | PRIMARY | 1 | inventory_id | 1 | 1 |
| sakila | inventory | idx_fk_film_id | 1 | film_id | 1 | 5 |
| sakila | inventory | idx_store_id_film_id | 1 | store_id | 0 | 4478 |
| sakila | inventory | idx_store_id_film_id | 2 | film_id | 1 | 2 |
+--------------+------------+----------------------+--------------+--------------+-------------------------+-------------------------+
</pre></blockquote>
<br/>
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<li><a title="Download" href="download.html">Download</a></li>
<li><a title="Install" href="install.html">Install</a></li>
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<h3>QUERY SCRIPT</h3>
<ul>
<li><a title="QueryScript" href="query_script.html">QueryScript</a></li>
<li><a title="Execution" href="query_script_execution.html">Execution</a></li>
<li><a title="Flow control" href="query_script_flow_control.html">Flow control</a></li>
<li><a title="Statements" href="query_script_statements.html">Statements</a></li>
<li><a title="Expressions" href="query_script_expressions.html">Expressions</a></li>
<li><a title="Variables" href="query_script_variables.html">Variables</a></li>
</ul>
<h3>DEBUG</h3>
<ul>
<li><a title="rdebug" href="rdebug.html">rdebug</a></li>
<li><a title="rdebug API" href="rdebug_api.html">rdebug API</a></li>
<li><a title="rdebug workflow" href="rdebug_workflow.html">Workflow</a></li>
</ul>
<h3>ROUTINES</h3>
<ul>
<li><a title="Execution & flow control" href="execution_routines.html">Execution & flow control</a></li>
<li><a title="General" href="general_routines.html">General</a></li>
<li><a title="Process" href="process_routines.html">Process</a></li>
<li><a title="Query analysis" href="query_analysis_routines.html">Query analysis</a></li>
<li><a title="Schema analysis" href="schema_analysis_routines.html">Schema analysis</a></li>
<li><a title="Security" href="security_routines.html">Security</a></li>
<li><a title="Text" href="text_routines.html">Text</a></li>
<li><a title="Time & date" href="temporal_routines.html">Time & date</a></li>
<li><a title="Charting" href="charting_routines.html">Charting</a></li>
</ul>
<h3>VIEWS</h3>
<ul>
<li><a title="Schema analysis" href="schema_analysis_views.html">Schema analysis</a></li>
<li><a title="Data dimension" href="data_dimension_views.html">Data dimension</a></li>
<li><a title="Process" href="process_views.html">Process</a></li>
<li><a title="Security" href="security_views.html">Security</a></li>
<li><a title="Monitoring" href="monitoring_views.html">Monitoring</a></li>
<li><a title="InnoDB Plugin" href="innodb_plugin_views.html">InnoDB Plugin</a></li>
<li><a title="Percona server" href="percona_server_views.html">Percona Server</a></li>
<li><a title="TokuDB" href="tokudb_views.html">TokuDB</a></li>
</ul>
<h3>DATA</h3>
<ul>
<li><a title="tables" href="tables.html">Tables</a></li>
<li><a title="variables" href="variables.html">Variables</a></li>
</ul>
<h3>META</h3>
<ul>
<li><a title="Help" href="help.html">help</a></li>
<li><a title="Metadata" href="metadata.html">metadata</a></li>
<li><a title="status" href="status.html">status</a></li>
</ul>
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<a href="">common_schema</a> documentation
</div>
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