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https://issues.apache.org/jira/browse/CASSANDRA-4511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827651#comment-13827651
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Jonathan Ellis commented on CASSANDRA-4511:
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bq. how do you index the 'y' field of the values in 'x'
Yeah, that's where I was going.
I note that mongodb only allows indexing top-level fields:
http://docs.mongodb.org/manual/core/index-single/
http://docs.mongodb.org/manual/core/index-multikey/
Created CASSANDRA-6382 for indexing user types with dot notation. Let's skip
the collections complication.
(Does sound like we have a consensus for indexing map keys.)
> Secondary index support for CQL3 collections
> ---------------------------------------------
>
> Key: CASSANDRA-4511
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4511
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 1.2.0 beta 1
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Fix For: 2.1
>
> Attachments: 4511.txt
>
>
> We should allow to 2ndary index on collections. A typical use case would be
> to add a 'tag set<String>' to say a user profile and to query users based on
> what tag they have.
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