Re: Changing the transaction isolation level within the stored

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От Markus Schaber
Тема Re: Changing the transaction isolation level within the stored
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Msg-id 43E214EE.3090005@logix-tt.com
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Ответ на Re: Changing the transaction isolation level within the stored  (Andrew Sullivan <ajs@crankycanuck.ca>)
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Hi, Andreq,

Andrew Sullivan wrote:

> I think you don't have a clear idea of what locks are necessary for
> updates.  Write operations on a row must block other write operations
> on the same row.  If more than one transaction needs the same kinds
> of locks on two different tables, but attempts to get those locks in
> the opposite order, you are all but guaranteed a deadlock.  MVCC
> helps, but it can't avoid locking the same data when that data is
> being updated.

You're right, I was mislead from my memory.

Sorry for the confusion I brought to this issue.

Markus

-- 
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org


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