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https://issues.apache.org/jira/browse/CALCITE-6021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17768130#comment-17768130
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Julian Hyde commented on CALCITE-6021:
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Setting the syntax didn't fix the problem. For some reason
{{SqlValidator.makeNullaryCall(SqlIdentifier id)}} is still not doing the right
thing. Looking into it.
> Add CURRENT_DATETIME function (enabled in BigQuery library)
> -----------------------------------------------------------
>
> Key: CALCITE-6021
> URL: https://issues.apache.org/jira/browse/CALCITE-6021
> Project: Calcite
> Issue Type: Bug
> Reporter: Tanner Clary
> Priority: Major
>
> Calcite supports parsing and validation for the CURRENT_DATETIME function
> according to CALCITE-4297 . However a native implementation was never added.
> The docs for the function may be found here:
>
> https://cloud.google.com/bigquery/docs/reference/standard-sql/datetime_functions#current_datetime
> An example:
> {{SELECT CURRENT_DATETIME([timezone])}} should return the current time as a
> {{DATETIME}} (a Calcite TIMESTAMP). There is an optional time zone argument.
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