tree 9ab3501d998d16b165f5c97c9d740e696964083e
parent 8c7a3c9ef4209d635b186189e17a2d9e728e9871
author Ariel Weisberg <aweisberg@apple.com> 1692823905 -0400
committer Ariel Weisberg <aweisberg@apple.com> 1693410426 -0400

Fix Accord compaction purger tombstone logic

Accord compaction purgers see random slices of Accord state during compaction (based on randomly selected compaction inputs).

For at least the `durability` column in the `commands` table the tombstone being created when truncating was deleting the latest value since we can get enough information to truncate without actuall yhaving the latest `durability` value.

To fix we can wait to emit a tombstone until we are erasing the entire command row when truncating or truncating with outcome and meanwhile we can drop the extra columns that are no longer needed instead of using a tombstone. We don't need to emit cell tombstones we can drop them from the purger when processing each row.

patch by Ariel Weisberg; reviewed by David Capwell for CASSANDRA-18795