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https://issues.apache.org/jira/browse/CASSANDRA-7855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117363#comment-14117363
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Jack Krupansky commented on CASSANDRA-7855:
-------------------------------------------
And terminology - this improvement is for "composite partition keys" -
"compound" refers to "primary keys" with clustering columns rather than just
the partition key portion of the primary key.
> Genralize use of IN for compound partition keys
> -----------------------------------------------
>
> Key: CASSANDRA-7855
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7855
> Project: Cassandra
> Issue Type: Bug
> Reporter: Sylvain Lebresne
> Priority: Minor
> Labels: cql
> Fix For: 2.0.11
>
>
> 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 necessary a better idea
> than parallelizing queries server side so this syntax, when introduced,
> should probably be used sparingly, but give we do support IN on partition
> keys, I see no reason not to extend it to compound PK properly.
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