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https://issues.apache.org/jira/browse/CALCITE-1659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886530#comment-15886530
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Julian Hyde commented on CALCITE-1659:
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Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/bb6ae0ac.
Thanks for the PR, [~rusanu]!
> Simplifying CAST(characterLiteral as TIMESTAMP) should round the sub-second
> fraction
> ------------------------------------------------------------------------------------
>
> Key: CALCITE-1659
> URL: https://issues.apache.org/jira/browse/CALCITE-1659
> Project: Calcite
> Issue Type: Bug
> Reporter: Remus Rusanu
> Assignee: Julian Hyde
> Fix For: 1.12.0
>
>
> Timestamps are losing sub-second parts after Calcite literal constant
> reduction.
> {noformat}
> select cast("1970-12-31 15:59:58.174" as TIMESTAMP) from src limit 1;
> {noformat}
> yields {{1970-12-31 15:59:58}} if CBO is enabled in Hive.
> {{ZonelessTimestamp.toString()}} contains a truncation 0-19 (ie. removes
> sub-second part from string representation).
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