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* Transactional behaviour with trigger
@ 2006-09-17 12:32 Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
2006-09-17 14:36 ` Re: Transactional behaviour with trigger Michael Fuhr <mike@fuhr.org>
0 siblings, 1 reply; 3+ messages in thread
From: Joost Kraaijeveld @ 2006-09-17 12:32 UTC (permalink / raw)
To: pgsql-sql
Hi,
I create two records in a transaction in two different tables: customer
and contactaddress. customer has a foreign key to contactaddress.
I also have third table, customeraddress, which is a materialized view
of the join of customer and contactaddress
For the table customer I have a trigger(function) that inserts a record
in this third table (which works OK as the record is added):
....
INSERT INTO customeraddress(customer, customernumber, lastname, zipcode, city,housenumber, address)
VALUES(NEW.objectid,NEW.customernumber,NEW.lastname,NULL,NULL,NULL,NULL);
For the contactaddress I also have a trigger(function) that should
update the record in the third table with the additional info of the
contactaddress:
....
SELECT INTO customer_record objectid FROM prototype.customers WHERE contactaddress = NEW.objectid;
IF customer_record.objectid IS NOT NULL THEN
UPDATE customeraddress set zipcode = NEW.zipcode, city = NEW.city, housenumber = NEW.housenumber , address = NEW.objectid
WHERE customer = customer_record.objectid;
This last trigger is executed but customer_record.objectid seems to be
always NULL as if the the customer record is not visible. Is that
correct or is there something wrong with the SQl above?
In other words:
1. start transaction
2. add customer record
3. fire customer insert trigger -> copy record to materialized view table
4. add contactaddress record
5. fire contactaddress insert trigger -> update record in materialized view table -> no customer record???
6. end transction
TIA
--
Groeten,
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
web: www.askesis.nl
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Transactional behaviour with trigger
2006-09-17 12:32 Transactional behaviour with trigger Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
@ 2006-09-17 14:36 ` Michael Fuhr <mike@fuhr.org>
2006-09-17 14:56 ` Re: Transactional behaviour with trigger Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
0 siblings, 1 reply; 3+ messages in thread
From: Michael Fuhr @ 2006-09-17 14:36 UTC (permalink / raw)
To: Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>; +Cc: pgsql-sql
On Sun, Sep 17, 2006 at 02:32:10PM +0200, Joost Kraaijeveld wrote:
> For the contactaddress I also have a trigger(function) that should
> update the record in the third table with the additional info of the
> contactaddress:
>
> ....
> SELECT INTO customer_record objectid FROM prototype.customers WHERE contactaddress = NEW.objectid;
> IF customer_record.objectid IS NOT NULL THEN
> UPDATE customeraddress set zipcode = NEW.zipcode, city = NEW.city, housenumber = NEW.housenumber , address = NEW.objectid
> WHERE customer = customer_record.objectid;
>
> This last trigger is executed but customer_record.objectid seems to be
> always NULL as if the the customer record is not visible. Is that
> correct or is there something wrong with the SQl above?
Where does prototype.customers fit in? Are you sure it has a row
that matches the WHERE clause? Where would that row have come from?
Is there a reason you're maintaining customeraddress as a materialized
view rather than as a "real" view?
--
Michael Fuhr
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Transactional behaviour with trigger
2006-09-17 12:32 Transactional behaviour with trigger Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
2006-09-17 14:36 ` Re: Transactional behaviour with trigger Michael Fuhr <mike@fuhr.org>
@ 2006-09-17 14:56 ` Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
0 siblings, 0 replies; 3+ messages in thread
From: Joost Kraaijeveld @ 2006-09-17 14:56 UTC (permalink / raw)
To: Michael Fuhr <mike@fuhr.org>; +Cc: pgsql-sql
Hi Michael,
Thanks for answering.
On Sun, 2006-09-17 at 08:36 -0600, Michael Fuhr wrote:
> On Sun, Sep 17, 2006 at 02:32:10PM +0200, Joost Kraaijeveld wrote:
> Where does prototype.customers fit in? Are you sure it has a row
> that matches the WHERE clause? Where would that row have come from?
I have solved it by rethinking what was actually happening and boosting
the traces of JBoss to see what it actually did.
It actually did this:
1. start transaction
2. add customer record
3. add contactaddress record
4 update the customer record <--- !!!!
5. end transction
So I moved the update of the materialized view to an update trigger of
the customer table and now it works.
> Is there a reason you're maintaining customeraddress as a materialized
> view rather than as a "real" view?
Pure performance reasons.
--
Groeten,
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
web: www.askesis.nl
^ permalink raw reply [nested|flat] 3+ messages in thread
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2006-09-17 12:32 Transactional behaviour with trigger Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
2006-09-17 14:36 ` Michael Fuhr <mike@fuhr.org>
2006-09-17 14:56 ` Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
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