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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (DRILL-2517) Apply Partition pruning before reading files during planning
Date Wed, 02 Mar 2016 17:21:18 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinfeng Ni resolved DRILL-2517.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 1.6.0

Follow-up work related to filter push down will be addressed in DRILL-3996. 

> Apply Partition pruning before reading files during planning
> ------------------------------------------------------------
>
>                 Key: DRILL-2517
>                 URL: https://issues.apache.org/jira/browse/DRILL-2517
>             Project: Apache Drill
>          Issue Type: New Feature
>          Components: Query Planning & Optimization
>    Affects Versions: 0.7.0, 0.8.0
>            Reporter: Adam Gilmore
>            Assignee: Jinfeng Ni
>             Fix For: 1.6.0, Future
>
>
> Partition pruning still tries to read Parquet files during the planning stage even though
they don't match the partition filter.
> For example, if there were an invalid Parquet file in a directory that should not be
queried:
> {code}
> 0: jdbc:drill:zk=local> select sum(price) from dfs.tmp.purchases where dir0 = 1;
> Query failed: IllegalArgumentException: file:/tmp/purchases/4/0_0_0.parquet is not a
Parquet file (too small)
> {code}
> The reason is that the partition pruning happens after the Parquet plugin tries to read
the footer of each file.
> Ideally, partition pruning would happen first before the format plugin gets involved.



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