[CASSANDRA-13293] MV read-before-write can be omitted for some operations

• Type: Improvement
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Feature/Materialized Views, Legacy/Local Write-Read Paths
• Assignee: Unassigned
• Reporter: Benjamin Roth
• Created: 03/Mar/17 07:07
• Updated: 16/Apr/19 09:30

Description

A view that has the same fields in the primary key as its base table (i call it a congruent key), does not require read-before-writes except:

• Range deletes
• Partition deletes

If the view uses filters on non-pk columns either a rbw is required or a write that does not match the filter has to be turned into a delete. In doubt I'd stay with the current behaviour and to a rbw.