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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-3636) Partition Pruning : We are not pruning sometimes when we use "is null/not null" in the filter
Date Wed, 12 Aug 2015 23:55:46 GMT

     [ https://issues.apache.org/jira/browse/DRILL-3636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinfeng Ni updated DRILL-3636:
------------------------------
    Assignee: Aman Sinha  (was: Jinfeng Ni)

> Partition Pruning : We are not pruning sometimes when we use "is null/not null" in the
filter
> ---------------------------------------------------------------------------------------------
>
>                 Key: DRILL-3636
>                 URL: https://issues.apache.org/jira/browse/DRILL-3636
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.2.0
>            Reporter: Rahul Challapalli
>            Assignee: Aman Sinha
>             Fix For: 1.2.0
>
>
> git.commit.id.abbrev=b23e837
> Partition pruning not taking place in the below case
> {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;
> +------+------+
> | text | json |
> +------+------+
> | 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=[IS NULL(CASE(=($0, 1991), null, 1))])
> 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}
> Attached the data set



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