[jira] [Updated] (CASSANDRA-7458) functional indexes

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-7458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-7458:
--------------------------------------

    Description: 
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));
{code}

http://www.postgresql.org/docs/9.3/static/indexes-expressional.html


  was:
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));
{code}

See also http://www.postgresql.org/docs/9.3/static/sql-createindex.html



> functional indexes
> ------------------
>
>                 Key: CASSANDRA-7458
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7458
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: API, Core
>            Reporter: Jonathan Ellis
>             Fix For: 3.0
>
>
> 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));
> {code}
> http://www.postgresql.org/docs/9.3/static/indexes-expressional.html



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