Re: Queries using rules show no rows modified? - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Queries using rules show no rows modified?
Date
Msg-id 200206150532.g5F5W1k22924@candle.pha.pa.us
Whole thread Raw
In response to Re: Queries using rules show no rows modified?  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Queries using rules show no rows modified?  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Has this been resolved and patched?

---------------------------------------------------------------------------

Tom Lane wrote:
> "Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at> writes:
> > Tom Lane <tgl@sss.pgh.pa.us> writes:
> >> Michael seems to feel that the tuple count should be nonzero if any
> >> of the replacement operations did anything at all.
> 
> > Here we usually add triggers, for replication, accounting, setting of 
> > calculated rows ... In all of our cases we want the addition of a trigger
> > (or rule on a table) to be transparent to the client.
> 
> Yeah.  Triggers wouldn't affect this anyway, unless they tell the system
> to suppress insertion/update/deletion of some tuples, in which case I
> think it is correct not to count those tuples (certainly that's how the
> code has always acted).  As far as rules go, the last proposal that I
> made would return the tuple count of the original query as long as there
> were no INSTEAD rules --- if you have only actions *added* by rules then
> they are transparent.
> 
> The hard case is where the original query is not executed because of an
> INSTEAD rule.  As the code presently stands, you get "UPDATE 0" (or
> INSERT or DELETE 0) in that case, regardless of what else was done
> instead by the rule.  I thought that was OK when we put the change in,
> but it seems clear that people do not like that behavior.  The notion
> of "keep it transparent" doesn't seem to help here.
> 
>             regards, tom lane
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
> 

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