Re: rules on INSERT can't UPDATE new instance?

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: ldm(at)apartia(dot)com
Cc: pgsql-general(at)hub(dot)org
Subject: Re: rules on INSERT can't UPDATE new instance?
Date: 2000-05-20 11:35:38
Message-ID: 200005201135.HAA15697@candle.pha.pa.us
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>
> From the create_rule man page this example is offered:
>
> CREATE RULE example_5 AS
> ON INERT TO emp WHERE new.salary > 5000
> DO
> UPDATE NEWSET SET salary = 5000;
>
> But what is "NEWSET"? Is it a keyword?

It should be:

CREATE RULE example_5 AS
ON INERT TO emp WHERE new.salary > 5000
DO
UPDATE emp SET salary = 5000
WHERE emp.oid = new.oid;

Fixing now.

>
> My problem is that on an insert with an invalid amount I try to perform
> an update with a corrected amount, but the action part of the rule
> doesn't affect or "see" the newly inserted row (or so it seems).
>
> I tried: CREATE RULE ON INSERT TO bid WHERE new.price > limit
> DO UPDATE bid SET price = 0.1;
>
> and all price columns in the bid table would be set to 0.1 _except_ the
> newly inserted row.
>
> Am I missing something obvious?

No, buggy documentation. My book has a section on rules too, but you
should be fine now.

--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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