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Re: table lock when where clause uses unique constraing instead of primary key.

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On Monday, November 4, 2013 3:23 PM, Adrian Klaver <adrian.klaver@xxxxxxxxx> wrote:


>Probably poor choice of words:). So then, what we are looking at is 
>other clients trying to update user_profile but not succeeding because 
>pid 4899 is blocking. At this point all I can see is that the offending 
>query is updating some fields the others are not; disabled and reset_code.
>
>Is that always the case?
>
>If so any thing in the code path that is different when those fields are 
>updated?

We have scenarios where exact same query is in play in all instances.
Any thoughts as to the fact that this could be a full table_lock simply based on the use of username (non primary key - but specifically unique constraint) in the where clause?  I'm grasping I know....


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