Sergey Nuyanzin created FLINK-38565:
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Summary: Reduce chain of TRY_CAST if source and target types are
same
Key: FLINK-38565
URL: https://issues.apache.org/jira/browse/FLINK-38565
Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Reporter: Sergey Nuyanzin
Assignee: Sergey Nuyanzin
example
{code:sql}
SELECT TRY_CAST(CAST(a AS STRING) AS STRING) FROM MyTable
{code}
will have 2 casts in plan while in fact {{TRY_CAST}} is useless since type is
already STRING
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