[jira] [Resolved] (DRILL-4549) Add support for more truncation units in date_trunc function

["Venki Korukanti (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-4549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Venki Korukanti resolved DRILL-4549.
------------------------------------
    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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