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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-6381) Add capability to do index based planning and execution
Date Thu, 03 May 2018 00:30:00 GMT
Aman Sinha created DRILL-6381:
---------------------------------

             Summary: Add capability to do index based planning and execution
                 Key: DRILL-6381
                 URL: https://issues.apache.org/jira/browse/DRILL-6381
             Project: Apache Drill
          Issue Type: New Feature
          Components: Execution - Relational Operators, Query Planning &amp; Optimization
            Reporter: Aman Sinha
            Assignee: Aman Sinha


If the underlying data source supports indexes (primary and secondary indexes), Drill should
leverage those during planning and execution in order to improve query performance.  

On the planning side, Drill planner should be enhanced to provide an abstraction layer which
express the index metadata and statistics.  Further, a cost-based index selection is needed
to decide which index(es) are suitable.  

On the execution side, appropriate operator enhancements would be needed to handle different
categories of indexes such as covering, non-covering indexes, taking into consideration the
index data may not be co-located with the primary table, i.e a global index.



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