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https://issues.apache.org/jira/browse/CALCITE-5423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17644497#comment-17644497
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Tanner Clary commented on CALCITE-5423:
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[~julianhyde] I'm taking a first look at this and just to verify my
understanding- this function _should_ support custom timeframes because it does
not use intervals, but just a time unit. However, the operands are still
ordered differently than they are in the standard
([reference|https://cloud.google.com/bigquery/docs/reference/standard-sql/timestamp_functions#timestamp_diff]).
Should this difference be accounted for in SqlTimestampDiffFunction,
StdConvertletTable, or perhaps both? Thanks.
> Implement TIMESTAMP_DIFF function (compatible with BigQuery)
> ------------------------------------------------------------
>
> Key: CALCITE-5423
> URL: https://issues.apache.org/jira/browse/CALCITE-5423
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Julian Hyde
> Assignee: Tanner Clary
> Priority: Major
>
> Implement TIMESTAMP_DIFF function (compatible with BigQuery).
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