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Vincent Veyron wrote:

> I suppose you use DBD::Pg, whose current default isolation 
> transaction level is ``Serializable'' 

Just to set the record straight for the archives, DBD::Pg makes 
no changes at all to the isolation level. The only way to change 
your level when using DBD::Pg would be to issue a SQL command:

$dbh->do('SET TRANSACTION ISOLATION LEVEL SERIALIZABLE');

(The *default* transaction isolation level can be changed in your 
postgresql.conf, and it is set to 'read committed' when the 
postgresql.conf is created via initdb.)

- -- 
Greg Sabino Mullane g...@turnstep.com
End Point Corporation http://www.endpoint.com/
PGP Key: 0x14964AC8 201404181453
http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8
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