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https://issues.apache.org/jira/browse/CALCITE-2339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16495902#comment-16495902
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James Duong commented on CALCITE-2339:
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Tableau does make use of non-interval units such as WEEK and QUARTER.
> JDBC adapter should transform timestamp arithmetic for target database
> -----------------------------------------------------------------------
>
> Key: CALCITE-2339
> URL: https://issues.apache.org/jira/browse/CALCITE-2339
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
> Attachments: Datetime Addition - Calcite.pdf
>
>
> JDBC adapter should transform timestamp arithmetic for target database.
> There are two ways in Calcite to add intervals to timestamps: the
> TIMESTAMP_ADD function and the "<timestamp> + <interval>" operator.
> The attached document (authored by James Doung) describes their pros and cons.
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