[HIVE-26072] Enable vectorization for stats gathering (tablescan op)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Hive
• Labels: pull-request-available
• Assignee: Ayush Saxena
• Reporter: Rajesh Balamohan
• Created: 24/Mar/22 23:47
• Updated: 31/Oct/22 00:28

Description

https://issues.apache.org/jira/browse/HIVE-24510 enabled vectorization for compute_bit_vector.

But tablescan operator for stats gathering is disabled by default.

https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/Vectorizer.java#L2577

Need to enable vectorization for this. This can significantly reduce runtimes for analyze statements for large tables.

Issue Links

• links to: GitHub Pull Request #3142
• links to: GitHub Pull Request #3228