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

[Jonathan Ellis (JIRA)]

Jonathan Ellis created CASSANDRA-7458:
-----------------------------------------

             Summary: 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}

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




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