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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-3941) Filter regions to scan for local indexes based on data table leading pk filter conditions
Date Wed, 14 Jun 2017 23:07:00 GMT
James Taylor created PHOENIX-3941:
-------------------------------------

             Summary: Filter regions to scan for local indexes based on data table leading
pk filter conditions
                 Key: PHOENIX-3941
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3941
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor


Had a good offline conversation with [~ndimiduk] at PhoenixCon about local indexes. Depending
on the query, we can often times prune the regions we need to scan over based on the where
conditions against the data table pk. For example, with a multi-tenant table, we only need
to scan the regions that are prefixed by the tenant ID.

We can easily get this information from the compilation of the query against the data table
(which we always do), through the statementContext.getScanRanges() structure. We'd just want
to keep a pointer to the data table QueryPlan from the local index QueryPlan.



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