[HIVE-16803] Alter table change column comment should not try to get column stats for update

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.4.0, 3.0.0
• Component/s: Statistics
• Assignee: Chaoyu Tang
• Reporter: Chaoyu Tang
• Created: 01/Jun/17 17:22
• Updated: 22/May/18 23:58
• Resolved: 02/Jun/17 18:31

Description

When running command like "alter table .. change .." (e.g. ALTER TABLE testtbl CHANGE col col string COMMENT 'change column comment' to change a column's comment, Hive should not go to fetch the column stats for update since the comment change does not affect table/partition column stats.