[SPARK-47430] Support GROUP BY for MapType

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: SQL
• Labels: pull-request-available
• Assignee: Stevo Mitric
• Reporter: Stevo Mitric
• Created: 17/Mar/24 09:31
• Updated: 12/Aug/24 02:35
• Resolved: 27/Mar/24 10:55

Description

Currently, Spark GROUP BY doesn't allow map data types, otherwise the plan analysis fails: https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ExprUtils.scala#L197-L203

Using implemented map_sort from https://issues.apache.org/jira/browse/SPARK-47007 we should implement GROUP BY for map data types.

Issue Links

• links to: GitHub Pull Request #45549
• links to: GitHub Pull Request #47532
• links to: GitHub Pull Request #47545