Re: incrementing without violating a constraint - Mailing list pgsql-general

From Tom Lane
Subject Re: incrementing without violating a constraint
Date
Msg-id 14881.1390232639@sss.pgh.pa.us
Whole thread Raw
In response to Re: incrementing without violating a constraint  ("Michael P. Soulier" <michael_soulier@mitel.com>)
List pgsql-general
"Michael P. Soulier" <michael_soulier@mitel.com> writes:
> On 20/01/14 Michael P. Soulier said:
>> This violates the uniquness constraint. Is there a way to say, turn off the
>> constraint, run the update and then turn it back on?

> Hmm. This didn't work.

> tugdb=# SET CONSTRAINTS ALL DEFERRED;
> SET CONSTRAINTS
> tugdb=# update siptrunkroutingrules set rule_number = rule_number + 1;
> ERROR:  duplicate key value violates unique constraint
> "siptrunkroutingrules_unique_trunk_rule_number"

You'd have had to mark the index constraint as deferrable for that
to have any effect on it.

            regards, tom lane


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