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Posted to issues@flink.apache.org by "Godfrey He (Jira)" <ji...@apache.org> on 2023/03/15 10:15:00 UTC

[jira] [Closed] (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 ]

Godfrey He closed FLINK-31273.
------------------------------
    Fix Version/s: 1.16.2
                   1.18.0
                   1.17.1
                       (was: 1.17.0)
       Resolution: Fixed

Fixed in

master: 8990822bd77d70f3249e1220a853e16dadd8ef54

1.17.1: 33278628dc599bed8944733efb9495ce77993d4b

1.16.2: f0361c720cb18c4ae7dc669c6a5da5b09bc8f563

> 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: Critical
>              Labels: pull-request-available
>             Fix For: 1.16.2, 1.18.0, 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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