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

["Mike Matrigali (JIRA)" <de...@db.apache.org>]

     [ http://issues.apache.org/jira/browse/DERBY-1068?page=all ]

Mike Matrigali reassigned DERBY-1068:
-------------------------------------

    Assign To: Mike Matrigali

> change of store contract: online compress operations should not share any locks with user transactions
> ------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-1068
>          URL: http://issues.apache.org/jira/browse/DERBY-1068
>      Project: Derby
>         Type: Improvement
>   Components: Store
>     Reporter: Andreas Korneliussen
>     Assignee: Mike Matrigali
>     Priority: Minor

>
> 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

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