Wei Zhong created FLINK-20756:
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Summary: PythonCalcSplitConditionRule is not working as expected
Key: FLINK-20756
URL: https://issues.apache.org/jira/browse/FLINK-20756
Project: Flink
Issue Type: Bug
Reporter: Wei Zhong
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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