[jira] [Created] (DRILL-4997) Perform parquet filter pushdown in logical planning.

["Jinfeng Ni (JIRA)" <ji...@apache.org>]

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.

 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)