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Re: TRUNCATE locking problem

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Joe Maldonado <jmaldonado@xxxxxxxxxxxxxxx> writes:
> While researching this locking issue I got some of the logs and found 
> that in one of the cases there was a SELECT running for a long time, 
> about 2 hours.  This select statement does not usually take more than a 
> few seconds though, it appeared that TRUNCATE was waiting on it to 
> finish before continuing.

> The SELECT statement in question contains a sub SELECT in the FROM 
> clause which in turn is joining with a view that contains the table 
> which TRUNCATE is being executed against.

> Is it possible that the SELECT was issues just before the TRUNCATE 
> statement was issues and the view in the sub SELECT was waiting on 
> TRUNCATE's lock?

No.  That would be a deadlock and would be reported as such.

			regards, tom lane

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