[KUDU-2132] False error dropping a column if it's renamed to the old name of a primary key column in the same alter as the primary key is renamed

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.6.0
• Component/s: master
• Code Review: https://gerrit.cloudera.org/#/c/8188/
• Assignee: William Berkeley
• Reporter: Adar Dembo
• Created: 02/Sep/17 17:09
• Updated: 02/Oct/17 19:06
• Resolved: 02/Oct/17 19:06

Description

We ran into the following situation in the attached randomized alter test log:

Two columns 'a' and 'b', 'a' is a primary key column. In the same alter table request,
1. Rename 'a' to 'c'
2. Rename 'b' to 'a'
3. Drop 'a'
In step 3, 'a' is not a primary key column and can be dropped; however, we err and reject the alter saying a primary key column cannot be dropped.