[jira] [Commented] (CASSANDRA-4511) Secondary index support for CQL3 collections

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-4511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13431994#comment-13431994 ] 

Sylvain Lebresne commented on CASSANDRA-4511:
---------------------------------------------

I'll note that support for lists should be fairly simple following CASSANDRA-3680. I haven't tried yet but it might well even be that it works out of the box. It would be the same for indexing based on map values.

However, indexing based on set values (or on map keys, but I don't know if we want that) is more complicated, because we need to index one of the component of the composite name, so it probably require a new Searcher.
                
> 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
>            Reporter: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.2
>
>
> 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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