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https://issues.apache.org/jira/browse/CALCITE-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17676868#comment-17676868
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Gian Merlino commented on CALCITE-5478:
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https://github.com/apache/calcite/pull/3029 makes this modification.
> Use highest input precision for datetimes in
> SqlTypeFactoryImpl.leastRestrictive
> --------------------------------------------------------------------------------
>
> Key: CALCITE-5478
> URL: https://issues.apache.org/jira/browse/CALCITE-5478
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Gian Merlino
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> For example: {{leastRestrictive(TIMESTAMP(3), TIMESTAMP(0))}} would be
> {{TIMESTAMP(3)}}, not {{TIMESTAMP(0)}}.
> Some code exists to do this for other types, but not datetimes.
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