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From "Sam Tunnicliffe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7771) Allow multiple 2ndary index on the same column
Date Wed, 19 Aug 2015 16:47:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14703333#comment-14703333
] 

Sam Tunnicliffe commented on CASSANDRA-7771:
--------------------------------------------

Allowing multiple indexes on a single column causes a dtest failure (it was previously expecting
the creation of a second index on a map column to be rejected). PR for that [here|https://github.com/riptano/cassandra-dtest/pull/481]

> Allow multiple 2ndary index on the same column
> ----------------------------------------------
>
>                 Key: CASSANDRA-7771
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7771
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Sylvain Lebresne
>            Assignee: Sam Tunnicliffe
>              Labels: client-impacting
>             Fix For: 3.0 beta 1
>
>
> Currently, the code assumes that we'll only have one 2ndary index per column. This has
been reasonable so far but stop being it with CASSANDRA-6382 (you might want to index multiple
fields of the same UDT column) and CASSANDRA-7458 (you may want to have one "normal" index
an multiple functional index for the same column). So we should consider removing that assumption
in the code, which is mainly 2 places:
> # in the schema: each ColumnDefinition only has infos for one index. This part should
probably be tackled in CASSANDRA-6717 so I'm marking this issue as a follow-up of CASSANDRA-6717.
> # in the 2ndary index API: this is the part I'm suggesting we fix in this issue.



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