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https://issues.apache.org/jira/browse/CASSANDRA-7458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Stupp updated CASSANDRA-7458:
------------------------------------
Labels: CQL doc-impacting (was: )
> functional indexes
> ------------------
>
> Key: CASSANDRA-7458
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7458
> Project: Cassandra
> Issue Type: New Feature
> Components: CQL
> Reporter: Jonathan Ellis
> Labels: CQL, doc-impacting
> Fix For: 3.x
>
>
> Indexing information derived from the row can be powerful. For example,
> using the hypothetical {{extract_date}} function,
> {code}
> create table ticks (
> symbol text,
> ticked_at datetime,
> price int,
> tags set<text>,
> PRIMARY KEY (symbol, ticked_at)
> );
> CREATE INDEX ticks_by_day ON ticks(extract_date(ticked_at));
> SELECT * FROM ticks_by_day WHERE extract_date(ticked_at) = '2014-5-13';
> {code}
> http://www.postgresql.org/docs/9.3/static/indexes-expressional.html
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