[SPARK-23902] Provide an option in months_between UDF to disable rounding-off

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.4.0
• Component/s: SQL
• Target Version/s: 2.4.0
• Assignee: Marco Gaido
• Reporter: Xiao Li
• Created: 09/Apr/18 05:54
• Updated: 26/Apr/18 03:19
• Resolved: 26/Apr/18 03:19

Description

https://issues.apache.org/jira/browse/HIVE-15511

Rounding off was added in {{GenericUDFMonthsBetween}} so that it can be compatible with systems like oracle. However, there are places where rounding off is not needed.

E.g "CAST(MONTHS_BETWEEN(l_shipdate, l_commitdate) / 12 AS INT)" may not need rounding off via BigDecimal which is compute intensive.

Issue Links

• links to: [Github] Pull Request #21008 (mgaido91)