RE: Query on exchanged partition
- From: <paul.baumgartel@xxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 5 Nov 2010 15:05:13 -0400
Thanks to Tim Gorman, I've found that the answer to the question below
is that the second statement is true.
Now, one more question. I want to drop the exchanged table as soon as I
can. Does the querying session's parse lock on the exchanged partition
move to the exchanged table after the exchange? If so, we could issue a
LOCK TABLE <exchanged table> IN EXCLUSIVE MODE WAIT, followed by DROP
TABLE <exchanged table>. The lock could be obtained as soon as the query
completed, and the drop right after that.
Paul Baumgartel
UBS AG
IB Accounting Solutions
400 Atlantic Street
Stamford, CT 06904
203.719.4368
paul.baumgartel@xxxxxxx
www.ubs.com
> _____________________________________________
> From: Baumgartel, Paul
> Sent: Friday, November 05, 2010 2:42 PM
> To: oracle-l@xxxxxxxxxxxxx
> Subject: Query on exchanged partition
>
> If a query on a partitioned table is in flight, and alter
> table...exchange partition is issued against it, which, if any, of the
> following is (are) true?
>
> * Partition exchange waits for query completion, since it requires
> a DDL lock
> * Partition exchange occurs immediately, query uses blocks
> formerly in the exchanged partition but now in the table that was
> exchanged
> * Query fails when it reaches the partition, throwing "no longer
> exists" error
> * Something else altogether
>
>
> Paul Baumgartel
> UBS AG
> IB Accounting Solutions
> 400 Atlantic Street
> Stamford, CT 06904
>
> 203.719.4368
>
> paul.baumgartel@xxxxxxx
> www.ubs.com
>
>
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