Dawid Wysakowicz created FLINK-16182:
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Summary: Remove invalid check in input type inference logic
Key: FLINK-16182
URL: https://issues.apache.org/jira/browse/FLINK-16182
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: Dawid Wysakowicz
Assignee: Dawid Wysakowicz
Fix For: 1.11.0
In {{org.apache.flink.table.types.inference.TypeInferenceUtil#inferInputTypes}}
we force that the input type inference must never return {{NULL}} type.
This precondition will never be satisfied when trying to infer output type
based on surrounding info. This check is invalid anyway.
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