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Re: an interesting lockRowComparingAttributes:
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Re: an interesting lockRowComparingAttributes:


  • Subject: Re: an interesting lockRowComparingAttributes:
  • From: Lachlan Deck <email@hidden>
  • Date: Thu, 3 Apr 2008 09:27:48 +1100

On 03/04/2008, at 9:11 AM, Chuck Hill wrote:

On Apr 2, 2008, at 2:57 PM, Lachlan Deck wrote:

On 03/04/2008, at 4:55 AM, Chuck Hill wrote:

On Apr 2, 2008, at 10:38 AM, David Avendasora wrote:

If the SELECT ... FOR LOCK can't find any rows that have fields with values that match exactly with what the DB has, then it wouldn't get any rows either. No?

Yes, but... SELECT ... FOR LOCK is _pessimistic_ locking and EOF should be using optimistic locking. If EOF is issuing pessimistic locking SQL, then something has gone wrong.


Maybe log the SQL and then compare what WO is looking for with what is actually in the DB?

That is not the issue. The important symptom is that EOF is doing a SELECT ... FOR LOCK.


Didn't you see this when you were using <cough> Vertical Inheritance?

Rings a bell for me...

(Pierre, see radar://5632577 for suggested fix)

Was it you that I was discussing this with?

We did discuss this at one point a while ago.

Do you recall what was happening? So many obscure bugs, so little time...

Yes, see thread "Snapshot weirdness" Dec 07 http://sourceforge.net/mailarchive/message.php?msg_id=email@hidden

Essentially... that thread will give you the background of the problem... but the real solution I posted to yourself/Mike offlist due to certain code mods.

with regards,
--

Lachlan Deck
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  • Follow-Ups:
    • Re: an interesting lockRowComparingAttributes:
      • From: Chuck Hill <email@hidden>
References: 
 >an interesting lockRowComparingAttributes: (From: Johan Henselmans <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: David Avendasora <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: Chuck Hill <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: David Avendasora <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: Chuck Hill <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: Lachlan Deck <email@hidden>)
 >Re: an interesting lockRowComparingAttributes: (From: Chuck Hill <email@hidden>)

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