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Posted to issues@drill.apache.org by "Khurram Faraaz (JIRA)" <ji...@apache.org> on 2017/01/04 07:36:58 UTC
[jira] [Updated] (DRILL-5049) wrong results - correlated subquery
interacting with null equality join
[ https://issues.apache.org/jira/browse/DRILL-5049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Khurram Faraaz updated DRILL-5049:
----------------------------------
Summary: wrong results - correlated subquery interacting with null equality join (was: difference in results - correlated subquery interacting with null equality join)
> wrong results - correlated subquery interacting with null equality join
> -----------------------------------------------------------------------
>
> Key: DRILL-5049
> URL: https://issues.apache.org/jira/browse/DRILL-5049
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 1.9.0
> Reporter: Khurram Faraaz
> Priority: Critical
> Attachments: nullEqJoin_17.drill_res, nullEqJoin_17.postgres, t_alltype.parquet
>
>
> Here is a query that uses null equality join. Drill 1.9.0 returns 124 records, whereas Postgres 9.3 returns 145 records. I am on Drill 1.9.0 git commit id: db308549
> I have attached the results from Drill 1.9.0 and Postgres, please review.
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> explain plan for
> . . . . . . . . . . . . . . > SELECT *
> . . . . . . . . . . . . . . > FROM `t_alltype.parquet` t1
> . . . . . . . . . . . . . . > WHERE EXISTS
> . . . . . . . . . . . . . . > (
> . . . . . . . . . . . . . . > SELECT *
> . . . . . . . . . . . . . . > FROM `t_alltype.parquet` t2
> . . . . . . . . . . . . . . > WHERE t1.c4 = t2.c4 OR (t1.c4 IS NULL AND t2.c4 IS NULL)
> . . . . . . . . . . . . . . > );
> +------+------+
> | text | json |
> +------+------+
> | 00-00 Screen
> 00-01 Project(*=[$0])
> 00-02 Project(T30¦¦*=[$0])
> 00-03 HashJoin(condition=[AND(=($1, $2), =($1, $3))], joinType=[inner])
> 00-05 Project(T30¦¦*=[$0], c4=[$1])
> 00-07 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/t_alltype.parquet]], selectionRoot=maprfs:/tmp/t_alltype.parquet, numFiles=1, usedMetadataFile=false, columns=[`*`]]])
> 00-04 HashAgg(group=[{0, 1}], agg#0=[MIN($2)])
> 00-06 Project(c40=[$1], c400=[$1], $f0=[true])
> 00-08 HashJoin(condition=[IS NOT DISTINCT FROM($0, $1)], joinType=[inner])
> 00-10 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/t_alltype.parquet]], selectionRoot=maprfs:/tmp/t_alltype.parquet, numFiles=1, usedMetadataFile=false, columns=[`c4`]]])
> 00-09 Project(c40=[$0])
> 00-11 HashAgg(group=[{0}])
> 00-12 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/t_alltype.parquet]], selectionRoot=maprfs:/tmp/t_alltype.parquet, numFiles=1, usedMetadataFile=false, columns=[`c4`]]])
> {noformat}
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