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https://issues.apache.org/jira/browse/FLINK-24492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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godfrey he reassigned FLINK-24492:
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Assignee: xuyang
> 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: xuyang
> Assignee: xuyang
> Priority: Minor
> Labels: pull-request-available
>
> 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 or flink supports this
> kind of implicit type conversion, we'd better temporarily forbidding this
> implicit type conversion in "=" and "<>".
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