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https://issues.apache.org/jira/browse/CALCITE-1659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886374#comment-15886374
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Julian Hyde commented on CALCITE-1659:
--------------------------------------
Reviewing the code now. It seems to make sense to call
{{roundTimestampToPrecision}} from {{makeLiteral}}, so that it gets hit by all
code paths. Will commit shortly.
> Timestamps are loosing sub-second parts after Calcite literal constant
> reduction
> --------------------------------------------------------------------------------
>
> Key: CALCITE-1659
> URL: https://issues.apache.org/jira/browse/CALCITE-1659
> Project: Calcite
> Issue Type: Bug
> Reporter: Remus Rusanu
> Assignee: Julian Hyde
>
> {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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