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https://issues.apache.org/jira/browse/FLINK-20756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17255592#comment-17255592
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Dian Fu commented on FLINK-20756:
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Fixed in release-1.12 via 3176d76b75b341eb2920a303285bf608723939c5
> PythonCalcSplitConditionRule is not working as expected
> -------------------------------------------------------
>
> Key: FLINK-20756
> URL: https://issues.apache.org/jira/browse/FLINK-20756
> Project: Flink
> Issue Type: Bug
> Components: API / Python
> Reporter: Wei Zhong
> Assignee: Huang Xingbo
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.13.0
>
>
> Currently if users write such a SQL:
> `SELECT pyFunc5(f0, f1) FROM (SELECT e.f0, e.f1 FROM (SELECT pyFunc5(a) as e
> FROM MyTable) where e.f0 is NULL)`
> It will be optimized to:
> `FlinkLogicalCalc(select=[pyFunc5(pyFunc5(a)) AS f0])
> +- FlinkLogicalCalc(select=[a], where=[IS NULL(pyFunc5(a).f0)])
> +- FlinkLogicalLegacyTableSourceScan(table=[[default_catalog,
> default_database, MyTable, source: [TestTableSource(a, b, c, d)]]],
> fields=[a, b, c, d])`
> The optimized plan is not runnable, we need to fix this.
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