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https://issues.apache.org/jira/browse/CASSANDRA-7855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Lerer updated CASSANDRA-7855:
--------------------------------------
Component/s: CQL
> Genralize use of IN for compound partition keys
> -----------------------------------------------
>
> Key: CASSANDRA-7855
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7855
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Reporter: Sylvain Lebresne
> Assignee: Benjamin Lerer
> Priority: Minor
> Labels: cql, docs
> Fix For: 2.2.0 beta 1
>
> Attachments: CASSANDRA-7855-V2.txt, CASSANDRA-7855.txt
>
>
> When you have a compount partition key, we currently only support to have a
> {{IN}} on the last column of that partition key. So given:
> {noformat}
> CREATE TABLE foo (
> k1 int,
> k2 int,
> v int,
> PRIMARY KEY ((k1, k2))
> )
> {noformat}
> we allow
> {noformat}
> SELECT * FROM foo WHERE k1 = 0 AND k2 IN (1, 2)
> {noformat}
> but not
> {noformat}
> SELECT * FROM foo WHERE k1 IN (0, 1) AND k2 IN (1, 2)
> {noformat}
> There is no particular reason for us not supporting the later (to the best of
> my knowledge) since it's reasonably straighforward, so we should fix it.
> I'll note that using {{IN}} on a partition key is not necessarily a better
> idea than parallelizing queries server client side so this syntax, when
> introduced, should probably be used sparingly, but given we do support IN on
> partition keys, I see no reason not to extend it to compound PK properly.
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