[jira] Updated: (CASSANDRA-1157) add support for multiple indexexpressions

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-1157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-1157:
--------------------------------------

    Attachment: 1157.txt

> add support for multiple indexexpressions
> -----------------------------------------
>
>                 Key: CASSANDRA-1157
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1157
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Jonathan Ellis
>             Fix For: 0.7 beta 1
>
>         Attachments: 1157.txt
>
>
> we should:
>  - use the statistics from CASSANDRA-1155 to figure out which index has the highest selectivity, and start with that
>  - if other indexes have high selectivity (average number of columns in an index row is less than 1% of total in that CF), we should do a merge join
>  - otherwise, just loop the results from the first and reject un-satisfied expressions

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