[CARBONDATA-1802] Carbon1.3.0 Alter:Alter query fails if a column is dropped and there is no key column

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Labels: functional
• Environment: 3 Node ant cluster
• Assignee: dhatchayani
• Reporter: Ajeet Rai
• Created: 23/Nov/17 13:43
• Updated: 06/Feb/18 12:49
• Resolved: 30/Nov/17 15:41

Description

Carbon1.3.0 Alter:Alter query fails if a column is dropped and there is no key column.

Steps:
1: create table ttt(c int,d int,e int) stored by 'carbondata';
2: Alter table ttt drop columns(c);
3: observe that below error is coming:
Error: java.lang.RuntimeException: Alter table drop column operation failed: Alter drop operation failed. AtLeast one key column should exist after drop.

Expected: Since user is able to create a table with all numeric columns, Same should be supported in Alter feature.

Issue Links

• links to: GitHub Pull Request #1561