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https://issues.apache.org/jira/browse/CALCITE-3530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17762529#comment-17762529
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Mihai Budiu commented on CALCITE-3530:
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This is related to https://issues.apache.org/jira/browse/CALCITE-5919?filter=-2
The solution is probably to use a Decimal data type, that would work for
arbitrary precision.
> TIMESTAMPADD/TIMESTAMPDIFF with microsecond/nanosecond unit lost precision
> --------------------------------------------------------------------------
>
> Key: CALCITE-3530
> URL: https://issues.apache.org/jira/browse/CALCITE-3530
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Zhenghua Gao
> Priority: Minor
>
> Since the TimestampAddConvertlet and TimestampDiffConvertlet tread TIMESTAMP
> as long (with millisecond precision), they lost precision even if the
> downstream can support microsecond or nanosecond.
>
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