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Jonathan Ellis commented on CASSANDRA-5633:
-------------------------------------------
How about this?
{code}
UPDATE foo SET x = 10 WHERE bar = 1
IF (SELECT y FROM foo WHERE baz = 2) = 3
{code}
Pro:
# Good match with semantics of what CAS actually does under the hood
# Fairly natural for SQL users
Con:
# Need to invent syntax for multiple columns ({{IF (SELECT y, z ...) = (3, 4)}})
# Risks confusing people who wonder why we don't support subqueries elsewhere
> CQL support for updating multiple rows in a partition using CAS
> ---------------------------------------------------------------
>
> Key: CASSANDRA-5633
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5633
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 2.0
> Reporter: sankalp kohli
> Priority: Minor
> Labels: cql3
> Fix For: 2.0
>
>
> This is currently supported via Thrift but not via CQL.
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