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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4997) Perform parquet filter pushdown in logical planning.
Date Fri, 04 Nov 2016 16:56:58 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15636981#comment-15636981
] 

Jinfeng Ni commented on DRILL-4997:
-----------------------------------

My bad.  I must click the button twice when I opened the JIRA, since the connection was not
responding quickly enough.   

> 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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