[CASSANDRA-16048] Safely Ignore Compact Storage Tables Where Users Have Defined Clustering and Value Columns

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.0-beta3, 4.0
• Component/s: Legacy/CQL
• Change Category: Operability
• Complexity: Normal
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/92f7c8db1444bf5d757cd50dba2211a446f3b22c

Test and Documentation Plan

Added new in-jvm dtest upgrade test. Currently, the test requires at least the preliminary patch in CASSNADRA-15946 in order to pass.

• Assignee: Jordan West
• Reporter: Jordan West

Authors

Jordan West

Reviewers

Caleb Rackliffe

• Created: 13/Aug/20 22:27
• Updated: 21/Dec/20 09:29
• Resolved: 19/Oct/20 19:21

Description

Some compact storage tables, specifically those where the user has defined both at least one clustering and the value column, can be safely handled in 4.0 because besides the DENSE flag they are not materially different post 3.0 and there is no visible change to the user facing schema after dropping compact storage. We can detect this case and allow these tables to silently drop the DENSE flag while still throwing a start-up error for COMPACT STORAGE tables that don’t meet the criteria.