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Posted to issues@drill.apache.org by "Zelaine Fong (JIRA)" <ji...@apache.org> on 2016/03/02 16:26:18 UTC
[jira] [Commented] (DRILL-2517) Apply Partition pruning before
reading files during planning
[ https://issues.apache.org/jira/browse/DRILL-2517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15175777#comment-15175777 ]
Zelaine Fong commented on DRILL-2517:
-------------------------------------
[~jni] - This is fixed in Apache master, right? If so, can you mark this resolved. Thanks.
> 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: 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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