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https://issues.apache.org/jira/browse/DRILL-4549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Venki Korukanti resolved DRILL-4549.
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Resolution: Fixed
> Add support for more truncation units in date_trunc function
> ------------------------------------------------------------
>
> Key: DRILL-4549
> URL: https://issues.apache.org/jira/browse/DRILL-4549
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.6.0
> Reporter: Venki Korukanti
> Assignee: Venki Korukanti
> Fix For: 1.7.0
>
>
> Currently we support only {{YEAR, MONTH, DAY, HOUR, MINUTE, SECOND}} truncate
> units for types {{TIME, TIMESTAMP and DATE}}. Extend the functions to support
> {{YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, WEEK, QUARTER, DECADE, CENTURY,
> MILLENNIUM}} truncate units for types {{TIME, TIMESTAMP, DATE, INTERVAL DAY,
> INTERVAL YEAR}}.
> Also get rid of the if-and-else (on truncation unit) implementation. Instead
> resolve to a direct function based on the truncation unit in Calcite -> Drill
> (DrillOptiq) expression conversion.
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