[jira] [Assigned] (DRILL-6910) A filtering column remains in scan when filter pruning happens

["Volodymyr Vysotskyi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-6910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Volodymyr Vysotskyi reassigned DRILL-6910:
------------------------------------------

    Assignee: Volodymyr Vysotskyi

> A filtering column remains in scan when filter pruning happens
> --------------------------------------------------------------
>
>                 Key: DRILL-6910
>                 URL: https://issues.apache.org/jira/browse/DRILL-6910
>             Project: Apache Drill
>          Issue Type: Improvement
>    Affects Versions: 1.14.0
>            Reporter: Anton Gozhiy
>            Assignee: Volodymyr Vysotskyi
>            Priority: Major
>
> *Data:*
> {code:sql}
> create table dfs.tmp.`nation` as select * from cp.`tpch/nation.parquet`;
> {code}
> *Query:*
> {code:sql}
> explain plan for select n_nationkey from dfs.tmp.`nation` where n_regionkey < 10;
> {code}
> *Expected result:*
>  The filtering column (n_regionkey) should not be present in scan operator.
> *Actual result:*
>  It remains in scan in spite of filter pruning.
> {noformat}
> 00-00    Screen : rowType = RecordType(ANY n_nationkey): rowcount = 25.0, cumulative cost = {52.5 rows, 77.5 cpu, 50.0 io, 0.0 network, 0.0 memory}, id = 112988
> 00-01      Project(n_nationkey=[$1]) : rowType = RecordType(ANY n_nationkey): rowcount = 25.0, cumulative cost = {50.0 rows, 75.0 cpu, 50.0 io, 0.0 network, 0.0 memory}, id = 112987
> 00-02        Scan(table=[[dfs, tmp, nation]], groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/nation]], selectionRoot=maprfs:/tmp/nation, numFiles=1, numRowGroups=1, usedMetadataFile=false, columns=[`n_regionkey`, `n_nationkey`]]]) : rowType = RecordType(ANY n_regionkey, ANY n_nationkey): rowcount = 25.0, cumulative cost = {25.0 rows, 50.0 cpu, 50.0 io, 0.0 network, 0.0 memory}, id = 112986
> {noformat}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)