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https://issues.apache.org/jira/browse/CASSANDRA-10765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15035184#comment-15035184
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Pavel Yaskevich commented on CASSANDRA-10765:
---------------------------------------------
After working on this for a couple of days it looks like this is going to
require a bunch of changes to the existing SI API, so instead we are planing to
take an alternative route: merge SASI with trunk as is; add composite support
and merge SASI into trunk, after doing that we can try to incrementally
integrate it with the existing indexes.
> 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: 3.2
>
>
> 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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