Re: changing an update via rules - Mailing list pgsql-sql

From Stephan Szabo
Subject Re: changing an update via rules
Date
Msg-id 20030719231214.Y55138-100000@megazone.bigpanda.com
Whole thread Raw
In response to changing an update via rules  (Lauren Matheson <lmatheson@ivcf.ca>)
List pgsql-sql
On 15 Jul 2003, Lauren Matheson wrote:

> Hello,
>
> I am having difficulty setting an on update rule which seems to be
> caught in a recursive loop.
>
> Context is a table with three columns assigning users to groups with the
> third column being boolean to flag the primary group.  I would like to
> set an update rule to enforce one primary group.  Any suggestions on how
> to do this, or exactly how the code is getting trapped?  My code is

Rules are like macro rewrites and the WHERE clauses will not help to break
the recursive loop.  I think you may need to either use a trigger or
something like a view so that the actual action happens on a different
table.



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