[ http://issues.apache.org/jira/browse/DERBY-1067?page=all ]
Andreas Korneliussen updated DERBY-1067:
----------------------------------------
Attachment: DERBY-1067v2.diff
DERBY-1067v2.stat
Attached is an updated patch. This patch includes changes from DERBY-690 to do
positioning at row location.
The sequence number has been associated with reusable record id, and is now
called "reusableRecordIdSequenceNumber"
instead of "compressTimeStamp".
The sequence number is incremented from BaseContainer.compressContainer(..). I
noticed that a purge operation
may cause pages with no records to be deallocated, so I have considered also
incrementing the number when
removing pages. However, some testing indicated to me that when a page is
reused after being deallocated by a
purge, the recordId is not reused within the page. It seems only truncate will
cause the recordId to be reused.
(truncate uses BaseContainer.compressContainer(..)).
Another change is that when incrementing the reusable record id sequenence
number, the isDirty flag may also be set, to
ensure the container header gets written do disk.
Testing:
T_AcessFactory has been extended with a test which checks that a compress
will update the sequence number, so that the positionAtRowLocation(..) returns
false.
The phaseTester has been extended to test that the version sequence number does
not
harm a 10.1 Database.
I have currently only run these tests with this patch.
I will start derbyall now, and also test this patch along with DERBY-690 and
DERBY-1058.
> support holdable Scrollable Updatable Resultsets
> ------------------------------------------------
>
> Key: DERBY-1067
> URL: http://issues.apache.org/jira/browse/DERBY-1067
> Project: Derby
> Type: Sub-task
> Reporter: Andreas Korneliussen
> Assignee: Andreas Korneliussen
> Attachments: DERBY-1067.diff, DERBY-1067.stat, DERBY-1067v2.diff,
> DERBY-1067v2.stat
>
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