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https://issues.apache.org/jira/browse/CALCITE-7629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18092357#comment-18092357
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Mihai Budiu commented on CALCITE-7629:
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Apologies, it looks like this bug has actually been fixed at some point and I
just have a stale version of a file in my compiler.
> TIMESTAMPDIFF is shown in error messages as DATEDIFF
> ----------------------------------------------------
>
> Key: CALCITE-7629
> URL: https://issues.apache.org/jira/browse/CALCITE-7629
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.42.0
> Reporter: Mihai Budiu
> Priority: Minor
>
> The parser uses SqlStdOperatorTable.DATEDIFF to represent TIMETSAMPDIFF In
> consequence, programs that use TIMETSAMPDIFF will actually unparse as
> DATEDIFF, and will report errors about DATEDIFF, e.g.:
> SELECT(TIMESTAMP_DIFF(a, b)) FROM T
> will produce an error message like:
> Invalid number of arguments to function 'DATEDIFF'. Was expecting 3 arguments
> This is confusing for the users.
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