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https://issues.apache.org/jira/browse/CALCITE-1444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15592864#comment-15592864
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Julian Hyde commented on CALCITE-1444:
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This isn't ready, and I think you know that. I tried to add some interval cases
to SqlParserTest, and they broke SqlUnParserTest because you haven't
implemented unparse on intervals. Can you fix, please? Do it as a separate
commit (not a squash) so I can merge in changes I've made.
> Add support for CONVERT scalar function
> ---------------------------------------
>
> Key: CALCITE-1444
> URL: https://issues.apache.org/jira/browse/CALCITE-1444
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Laurent Goujon
> Assignee: Julian Hyde
>
> Both ODBC and JDBC spec mention a {{CONVERT}} scalar function, which is the
> equivalent of the {{CAST}} function.
> In order for JDBC and ODBC drivers to expose support for this function,
> calcite should support parsing it, and converting it into a {{CAST}}
> expression (currently, it doesn't unlike some other scalar functions).
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