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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4997) Perform parquet filter pushdown in logical planning.
Date Fri, 04 Nov 2016 04:26:58 GMT
Jinfeng Ni created DRILL-4997:
---------------------------------

             Summary: Perform parquet filter pushdown in logical planning. 
                 Key: DRILL-4997
                 URL: https://issues.apache.org/jira/browse/DRILL-4997
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
            Reporter: Jinfeng Ni


DRILL-1950 put parquet filter pushdown rule in physical planning phase, after all join order
related tasks have been done.  Main reason for doing this is we want to reduce the performance
regression possibility caused by a different join order, as a result of reduced row count
in scan operator. 

Ideally this should be done in logical planning, before join order planning is done. Before
we can make such change, we have to figure out how to adjust the selectivity estimation of
filter operator, after filter is pushed down to scan.

 



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