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* Question regarding triggers
@ 2003-10-20 13:00 Dmitri Fuerle <ffo2lp@yahoo.com>
0 siblings, 1 reply; 6+ messages in thread
From: Dmitri Fuerle @ 2003-10-20 13:00 UTC (permalink / raw)
To: pgsql-sql
I'm writing a trigger but running into problems. My problem is that I can not determine anyway to tell what fields are in the *new* record. Without knowing what fields are there I get runtime errors if that's not what is being updated example:
CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'
begin
If new.shipment_type_id = 4 then
--do something
end if;
return new;
end;
in the above example everything works if shipment_type_id is being updated. If it is not I will receive a run-time error because shipment_type_id is not part of the record new.
Please help,
Dmitri
---------------------------------
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^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: Question regarding triggers
@ 2003-10-20 13:22 achill@matrix.gatewaynet.com
parent: Dmitri Fuerle <ffo2lp@yahoo.com>
0 siblings, 1 reply; 6+ messages in thread
From: achill@matrix.gatewaynet.com @ 2003-10-20 13:22 UTC (permalink / raw)
To: Dmitri Fuerle <ffo2lp@yahoo.com>; +Cc: pgsql-sql
Why dont you try to write your trigger in C?
On Mon, 20 Oct 2003, Dmitri Fuerle wrote:
>
> I'm writing a trigger but running into problems. My problem is that I can not determine anyway to tell what fields are in the *new* record. Without knowing what fields are there I get runtime errors if that's not what is being updated example:
>
> CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'
> begin
> If new.shipment_type_id = 4 then
> --do something
> end if;
> return new;
> end;
>
> in the above example everything works if shipment_type_id is being updated. If it is not I will receive a run-time error because shipment_type_id is not part of the record new.
>
> Please help,
> Dmitri
>
>
>
>
> ---------------------------------
> Do you Yahoo!?
> The New Yahoo! Shopping - with improved product search
--
-Achilleus
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: Question regarding triggers
@ 2003-10-20 13:31 A.Bhuvaneswaran <bhuvan@symonds.net>
parent: achill@matrix.gatewaynet.com
0 siblings, 3 replies; 6+ messages in thread
From: A.Bhuvaneswaran @ 2003-10-20 13:31 UTC (permalink / raw)
To: achill@matrix.gatewaynet.com; +Cc: Dmitri Fuerle <ffo2lp@yahoo.com>; pgsql-sql
> Why dont you try to write your trigger in C?
Hi, one cannot write triggered procedures in C. Currently, it can only be
written in plpsgql.
> > CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'
> > begin
> > If new.shipment_type_id = 4 then
> > --do something
> > end if;
> > return new;
> > end;
> > in the above example everything works if shipment_type_id is being
> > updated. If it is not I will receive a run-time error because
> > shipment_type_id is not part of the record new.
All the fields of updated record must available in NEW variable. Refer
the manual for details. Forward your sql & run-time error for further
assistance.
regards,
bhuvaneswaran
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: Question regarding triggers
@ 2003-10-20 13:48 Tom Lane <tgl@sss.pgh.pa.us>
parent: A.Bhuvaneswaran <bhuvan@symonds.net>
2 siblings, 0 replies; 6+ messages in thread
From: Tom Lane @ 2003-10-20 13:48 UTC (permalink / raw)
To: A.Bhuvaneswaran <bhuvan@symonds.net>; +Cc: achill@matrix.gatewaynet.com, Dmitri Fuerle <ffo2lp@yahoo.com>; pgsql-sql
"A.Bhuvaneswaran" <bhuvan@symonds.net> writes:
>> Why dont you try to write your trigger in C?
> Hi, one cannot write triggered procedures in C.
Oh? All the built-in trigger procedures are.
regards, tom lane
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: Question regarding triggers
@ 2003-10-20 13:56 achill@matrix.gatewaynet.com
parent: A.Bhuvaneswaran <bhuvan@symonds.net>
2 siblings, 0 replies; 6+ messages in thread
From: achill@matrix.gatewaynet.com @ 2003-10-20 13:56 UTC (permalink / raw)
To: A.Bhuvaneswaran <bhuvan@symonds.net>; +Cc: Dmitri Fuerle <ffo2lp@yahoo.com>; pgsql-sql
On Mon, 20 Oct 2003, A.Bhuvaneswaran wrote:
> > Why dont you try to write your trigger in C?
>
> Hi, one cannot write triggered procedures in C. Currently, it can only be
> written in plpsgql.
Where did you get that impression from?
Do an
SELECT tgrelid,tgfoid,proname from pg_trigger,pg_proc where
tgfoid=pg_proc.oid and prolang=13;
in your system to check if you have any :)
>
> > > CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'
> > > begin
> > > If new.shipment_type_id = 4 then
> > > --do something
> > > end if;
> > > return new;
> > > end;
> > > in the above example everything works if shipment_type_id is being
> > > updated. If it is not I will receive a run-time error because
> > > shipment_type_id is not part of the record new.
>
> All the fields of updated record must available in NEW variable. Refer
> the manual for details. Forward your sql & run-time error for further
> assistance.
>
> regards,
> bhuvaneswaran
>
>
--
-Achilleus
^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: Question regarding triggers
@ 2003-10-20 15:07 Dmitri Fuerle <ffo2lp@yahoo.com>
parent: A.Bhuvaneswaran <bhuvan@symonds.net>
2 siblings, 0 replies; 6+ messages in thread
From: Dmitri Fuerle @ 2003-10-20 15:07 UTC (permalink / raw)
To: pgsql-sql
Thanks for the help. I discovered my error while coming up with a better example.
Thanks,
Dmitri
"A.Bhuvaneswaran" <bhuvan@symonds.net> wrote:
> Why dont you try to write your trigger in C?
Hi, one cannot write triggered procedures in C. Currently, it can only be
written in plpsgql.
> > CREATE FUNCTION "public"."check_shipment" () RETURNS trigger AS'
> > begin
> > If new.shipment_type_id = 4 then
> > --do something
> > end if;
> > return new;
> > end;
> > in the above example everything works if shipment_type_id is being
> > updated. If it is not I will receive a run-time error because
> > shipment_type_id is not part of the record new.
All the fields of updated record must available in NEW variable. Refer
the manual for details. Forward your sql & run-time error for further
assistance.
regards,
bhuvaneswaran
---------------------------------
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
^ permalink raw reply [nested|flat] 6+ messages in thread
end of thread, other threads:[~2003-10-20 15:07 UTC | newest]
Thread overview: 6+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2003-10-20 13:00 Question regarding triggers Dmitri Fuerle <ffo2lp@yahoo.com>
2003-10-20 13:22 ` achill@matrix.gatewaynet.com
2003-10-20 13:31 ` A.Bhuvaneswaran <bhuvan@symonds.net>
2003-10-20 13:48 ` Tom Lane <tgl@sss.pgh.pa.us>
2003-10-20 13:56 ` achill@matrix.gatewaynet.com
2003-10-20 15:07 ` Dmitri Fuerle <ffo2lp@yahoo.com>
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