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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-7458) functional indexes
Date Thu, 06 Nov 2014 17:11:34 GMT

     [ 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));

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


  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}

http://www.postgresql.org/docs/9.3/static/indexes-expressional.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
>            Assignee: Mikhail Stepura
>             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));
> 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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