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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2023/03/01 12:55:00 UTC
[jira] [Assigned] (FLINK-31273) Left join with IS_NULL filter be wrongly pushed down and get wrong join results
[ https://issues.apache.org/jira/browse/FLINK-31273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jark Wu reassigned FLINK-31273:
-------------------------------
Assignee: Yunhong Zheng
> Left join with IS_NULL filter be wrongly pushed down and get wrong join results
> -------------------------------------------------------------------------------
>
> Key: FLINK-31273
> URL: https://issues.apache.org/jira/browse/FLINK-31273
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.17.0, 1.16.1
> Reporter: Yunhong Zheng
> Assignee: Yunhong Zheng
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.17.1
>
>
> Left join with IS_NULL filter be wrongly pushed down and get wrong join results. The sql is:
> {code:java}
> SELECT * FROM MyTable1 LEFT JOIN MyTable2 ON a1 = a2 WHERE a2 IS NULL AND a1 < 10
> The wrongly plan is:
> LogicalProject(a1=[$0], b1=[$1], c1=[$2], b2=[$3], c2=[$4], a2=[$5])
> +- LogicalFilter(condition=[IS NULL($5)])
> +- LogicalJoin(condition=[=($0, $5)], joinType=[left])
> :- LogicalValues(tuples=[[]])
> +- LogicalTableScan(table=[[default_catalog, default_database, MyTable2]]) {code}
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