suibianwanwan created CALCITE-6534:
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Summary: Fix type mismatches when pulling up Calc nodes in
JoinUnifyRule
Key: CALCITE-6534
URL: https://issues.apache.org/jira/browse/CALCITE-6534
Project: Calcite
Issue Type: Improvement
Reporter: suibianwanwan
In JoinOnLeftCalcUnifyRule, JoinOnRIghtCalcUnifyRule, JoinOnCalcUnifyRule,
calcite tries to pull up the calc operator to make Query equivalent to target .
In [CALCITE-6501|https://issues.apache.org/jira/browse/CALCITE-6501], for the
case where the assert is due to a difference in nullablity, we do an early
intercept and return null. This will result in some cases that can be rewritten
not being able to be rewritten.
We can fix nullablility if this rewrite maintains semantics
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