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Posted to issues@drill.apache.org by "Rahul Challapalli (JIRA)" <ji...@apache.org> on 2015/01/20 20:30:36 UTC
[jira] [Commented] (DRILL-2044) Filter not being pushed down when
we join tables with wide records
[ https://issues.apache.org/jira/browse/DRILL-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284273#comment-14284273 ]
Rahul Challapalli commented on DRILL-2044:
------------------------------------------
This seems to be the same for merge join as well
> Filter not being pushed down when we join tables with wide records
> ------------------------------------------------------------------
>
> Key: DRILL-2044
> URL: https://issues.apache.org/jira/browse/DRILL-2044
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Reporter: Rahul Challapalli
> Assignee: Jinfeng Ni
> Attachments: widestrings_small.parquet
>
>
> git.commit.id.abbrev=a418af1
> The filter is not being pushed down according to the plan. This could either be a bug or expected behavior based on the optimization rules. So someone needs to verify that it is atleast not a bug
> {code}
> explain plan for select count(ws1.str_var) from widestrings_small ws1 INNER JOIN widestrings_small ws2 on ws1.str_fixed_null_empty=ws2.str_var_null_empty where ws1.tinyint_var > 120;
> 00-00 Screen
> 00-01 StreamAgg(group=[{}], EXPR$0=[COUNT($0)])
> 00-02 Project(str_var=[$2])
> 00-03 SelectionVectorRemover
> 00-04 Filter(condition=[>($1, 120)])
> 00-05 HashJoin(condition=[=($0, $3)], joinType=[inner])
> 00-07 Project(str_fixed_null_empty=[$2], tinyint_var=[$1], str_var=[$0])
> 00-08 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/drill/testdata/data-shapes/wide-columns/5000/1000rows/parquet/widestrings_small]], selectionRoot=/drill/testdata/data-shapes/wide-columns/5000/1000rows/parquet/widestrings_small, numFiles=1, columns=[`str_fixed_null_empty`, `tinyint_var`, `str_var`]]])
> 00-06 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/drill/testdata/data-shapes/wide-columns/5000/1000rows/parquet/widestrings_small]], selectionRoot=/drill/testdata/data-shapes/wide-columns/5000/1000rows/parquet/widestrings_small, numFiles=1, columns=[`str_var_null_empty`]]])
> {code}
> I attached the data file used. Let me know if you have any questions
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