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Riak Query Language, based on JSONSelect

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README.md

riak-ql

A small query language atop the excellent JSONSelect for Riak Map phases.

Sample usage with riak-js

var db = require('riak-js').getClient();

db
  .add('users')
  .map('query', ':root where .admin && !.email:val("justin@gmail.com")')
  .run()

Install

Copy riak-ql.js to your js_source_dir. This will make query available in the global scope.

Query Language

It is basically composed by a main selector, and an array of selectors exclusively used for conditions.

The main selector (the value you want to get out) is separated from the condition selectors by a where clause.

Boolean operators && and ! can be used as expected. There is no || as JSONSelect already allows this by separating expressions with a comma (,) - use that.

Everything is optional, which means that even an empty query will also work, returning :root.

More examples

.email

.email where !.expired

:root where .name("Justin"), .name("Mark")

where .admin

:root where .admin && .email:val("justin@gmail.com") && !.expired

Warning

It is a very quick hack, not a proper parser.

Using the where or && literals for other than the intended use will cause trouble.

Not recommended for production use.

License

MIT License. JSONSelect licensed under ISC.

Copyright (c) 2011 Francisco Treacy, francisco.treacy@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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