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https://issues.apache.org/jira/browse/CALCITE-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-1312.
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Resolution: Fixed
Fix Version/s: 1.9.0
Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/db6a3b3b. Thanks
for the PR, [~minjikim]!
> Return type of TIMESTAMP_ADD applied to a DATE should be TIMESTAMP if unit is
> smaller than DAY
> ----------------------------------------------------------------------------------------------
>
> Key: CALCITE-1312
> URL: https://issues.apache.org/jira/browse/CALCITE-1312
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: MinJi Kim
> Assignee: Julian Hyde
> Fix For: 1.9.0
>
>
> timestamp_add("MINUTE", 1, date '2016-06-15') returns 2016-06-15 since it
> returns a date and therefore truncates the minute informtion. timestamp_add
> should return timestamp instead of date for units less than date.
> timestamp_diff with date doesn't handle null properly (in type inference),
> converted type is INTEGER NOT NULL (when it should be null).
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