xuyangzhong created FLINK-24492:
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Summary: incorrect implicit type conversion between numeric and
(var)char
Key: FLINK-24492
URL: https://issues.apache.org/jira/browse/FLINK-24492
Project: Flink
Issue Type: Bug
Reporter: xuyangzhong
The result of the sql "select 1 = '1'" is false. This is caused by the CodeGen.
CodeGen incorrectly transform this "=" to "BinaryStringData.equals (int 1)".
And "<>" has the same wrong result.
In my opinion, "=" should have the same behavior with ">" and "<", which have
the correct results. So before calcite solves this bug, we'd better temporarily
forbidding this implicit type conversion in "=" and "<>".
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