Venki Korukanti created DRILL-4549:
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Summary: Add support for more 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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