Sylvain Lebresne created CASSANDRA-6383:
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Summary: Secondary indexing of map keys
Key: CASSANDRA-6383
URL: https://issues.apache.org/jira/browse/CASSANDRA-6383
Project: Cassandra
Issue Type: Improvement
Reporter: Sylvain Lebresne
Assignee: Sylvain Lebresne
Fix For: 2.1
CASSANDRA-4511 started adding secondary indexing for collections, but didn't
wired map key indexing because this requires generalizing a bit the 2ndary
index API to support 2 indexes on the same column. And since that's not
entirely related to the initial problem of CASSANDRA-4511, let's tackle this
last part here.
I'll note that one other is the syntax. For selection, I propose
{noformat}
SELECT * FROM foo WHERE myMap CONTAINS KEY 'bar';
{noformat}
(but that assumes we use CONTAINS in CASSANDRA-4511, if we use IN, we'll need
something else)
For declaring indexes I'm less inspired. We could have something like
{noformat}
CREATE INDEX ON foo(myMap KEYS)
{noformat}
but maybe someone has a better idea?
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