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Posted to issues@drill.apache.org by "Jason Altekruse (JIRA)" <ji...@apache.org> on 2016/01/14 19:32:39 UTC
[jira] [Commented] (DRILL-3731) Partition Pruning not taking place
when we have case statement within the filter
[ https://issues.apache.org/jira/browse/DRILL-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15098605#comment-15098605 ]
Jason Altekruse commented on DRILL-3731:
----------------------------------------
Looks like this may still need verification and a test case, but as there isn't a patch attached I'm removing the "reviewable" status
> Partition Pruning not taking place when we have case statement within the filter
> --------------------------------------------------------------------------------
>
> Key: DRILL-3731
> URL: https://issues.apache.org/jira/browse/DRILL-3731
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.2.0
> Reporter: Rahul Challapalli
> Assignee: Sean Hsuan-Yi Chu
> Fix For: 1.5.0
>
> Attachments: lineitempart.tgz
>
>
> Commit # 8f33c3d55228a98ea2a309490ecbfb7a180f012c
> Partition Pruning is not taking place in the below query
> {code}
> explain plan for select count(*) from `/drill/testdata/partition_pruning/dfs/lineitempart` where case when dir0=1991 then null else 1 end is null or dir0=1992;
> 00-00 Screen
> 00-01 Project(EXPR$0=[$0])
> 00-02 StreamAgg(group=[{}], EXPR$0=[COUNT()])
> 00-03 Project($f0=[0])
> 00-04 SelectionVectorRemover
> 00-05 Filter(condition=[OR(IS NULL(CASE(=($0, 1991), null, 1)), =($0, 1992))])
> 00-06 Scan(groupscan=[EasyGroupScan [selectionRoot=maprfs:/drill/testdata/partition_pruning/dfs/lineitempart, numFiles=7, columns=[`dir0`], files=[maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1991/lineitemaa.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1992/lineitemab.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1996/lineitemaf.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1994/lineitemad.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1993/lineitemac.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1997/lineitemag.tbl, maprfs:/drill/testdata/partition_pruning/dfs/lineitempart/1995/lineitemae.tbl]]])
> {code}
> The planner should have pruned all partitions except 1991 & 1992
> I attached the dataset. Let me know if you need anything.
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