[DERBY-1068] change of store contract: online compress operations should not share any locks with user transactions

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Store
• Assignee: Unassigned
• Reporter: Andreas Korneliussen
• Created: 28/Feb/06 23:39
• Updated: 21/Feb/16 18:34

Description

Propose to add the following to the store contract:

• truncate and compress requires exclusive table locking
• the truncate, purge and compress operations do not share any locks with user transactions

Currently the store implementation allows users to share locks in truncate and possibly purge.

This request is driven by:
http://www.nabble.com/conflict-detection-strategies-t1120376.html#a2938142

and:

http://www.nabble.com/RowLocation-contract-from-storage-engine-t1142235.html#a2994156