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From "Corentin Chary (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10765) add RangeIterator interface and QueryPlan for SI
Date Wed, 16 Nov 2016 07:52:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15669751#comment-15669751
] 

Corentin Chary commented on CASSANDRA-10765:
--------------------------------------------

This slightly relates to CASSANDRA-12915. Currently it looks like we could do a better job
at querying multiple SASI indexes too.

> add RangeIterator interface and QueryPlan for SI
> ------------------------------------------------
>
>                 Key: CASSANDRA-10765
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10765
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Local Write-Read Paths
>            Reporter: Pavel Yaskevich
>            Assignee: Pavel Yaskevich
>             Fix For: 3.x
>
>
> Currently built-in indexes have only one way of handling intersections/unions: pick the
highest selectivity predicate and filter on other index expressions. This is not always the
most efficient approach. Dynamic query planning based on the different index characteristics
would be more optimal. Query Plan should be able to choose how to do intersections, unions
based on the metadata provided by indexes (returned by RangeIterator) and RangeIterator would
became a base for cross index interactions and should have information such as min/max token,
estimate number of wrapped tokens etc.



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