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https://issues.apache.org/jira/browse/DRILL-3610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658554#comment-14658554
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Daniel Barclay (Drill) commented on DRILL-3610:
-----------------------------------------------
Standard SQL already defines addition and subtraction operations on valid
combinations of timestamps (and other datetime) types and intervals (see
ISO/IEC 9075-2:2011(E) section 4.6.4).
Do the functions requested above provide functionality that the standard
operations do not provide?
> TimestampAdd/Diff (SQL_TSI_) functions
> --------------------------------------
>
> Key: DRILL-3610
> URL: https://issues.apache.org/jira/browse/DRILL-3610
> Project: Apache Drill
> Issue Type: Improvement
> Components: Functions - Drill
> Reporter: Andries Engelbrecht
> Assignee: Mehant Baid
>
> Add TimestampAdd and TimestampDiff (SQL_TSI) functions for year, quarter,
> month, week, day, hour, minute, second.
> Examples
> SELECT CAST(TIMESTAMPADD(SQL_TSI_QUARTER,1,Date('2013-03-31'), SQL_DATE) AS
> `column_quarter`
> FROM `table_in`
> HAVING (COUNT(1) > 0)
> SELECT `table_in`.`datetime` AS `column1`,
> `table`.`Key` AS `column_Key`,
> TIMESTAMPDIFF(SQL_TSI_MINUTE,to_timestamp('2004-07-04',
> 'yyyy-MM-dd'),`table_in`.`datetime`) AS `sum_datediff_minute`
> FROM `calcs`
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