Thread: Need help on triggers - postgres 9.1.2
Hi
I have a postgres 9 database, inside this database I need to create a new table called center_changed that gets inserted by any change that take place in a table called center. So I need to create trigger to do this.
Example:
Table name: center(c_cde, c_dsc, ops_cde, grp_cde);
Now on the table called center , I need to create an INSERT and UPDATE trigger will insert the c_cde of the inserted or updated center into the center_changed table
Please help me
I have this syntax below, but please help me with the overall query.
CREATE TRIGGER check_center
BEFORE INSERT OR UPDATE
ON center FOR EACH ROW
EXECUTE PROCEDURE check_center_changes();
Thanks
CONFIDENTIALITY NOTICE The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by anyone other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer immediately and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no liability for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
On 05/21/2014 02:54 AM, Khangelani Gama wrote: > Hi > > I have a postgres 9 database, inside this database I need to create a > new table called *center_changed* that gets inserted by any change that > take place in a table called *center*. So I need to create trigger to do > this. > > *Example: * > > Table name*: center*(c_cde, c_dsc, ops_cde, grp_cde); > > Now on the table called *center , *I need to create an INSERT and UPDATE > trigger will insert the *c_cde * of the inserted or updated *center* > into the *center_changed* table > > Please help me > > I have this syntax below, but please help me with the overall query. > > CREATE TRIGGER check_center > > BEFORE INSERT OR UPDATE > > ON *cente*r FOR EACH ROW > > EXECUTE PROCEDURE check_center_changes(); See here: http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html Example 40-4. A PL/pgSQL Trigger Procedure For Auditing > > Thanks > -- Adrian Klaver adrian.klaver@aklaver.com
Thank you very much, I will have a look. -----Original Message----- From: Adrian Klaver [mailto:adrian.klaver@aklaver.com] Sent: Wednesday, May 21, 2014 3:20 PM To: Khangelani Gama; pgsql-general@postgresql.org Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2 On 05/21/2014 02:54 AM, Khangelani Gama wrote: > Hi > > I have a postgres 9 database, inside this database I need to create a > new table called *center_changed* that gets inserted by any change > that take place in a table called *center*. So I need to create > trigger to do this. > > *Example: * > > Table name*: center*(c_cde, c_dsc, ops_cde, grp_cde); > > Now on the table called *center , *I need to create an INSERT and > UPDATE trigger will insert the *c_cde * of the inserted or updated > *center* into the *center_changed* table > > Please help me > > I have this syntax below, but please help me with the overall query. > > CREATE TRIGGER check_center > > BEFORE INSERT OR UPDATE > > ON *cente*r FOR EACH ROW > > EXECUTE PROCEDURE check_center_changes(); See here: http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html Example 40-4. A PL/pgSQL Trigger Procedure For Auditing > > Thanks > -- Adrian Klaver adrian.klaver@aklaver.com CONFIDENTIALITY NOTICE The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by anyone other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer immediately and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no liability for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
Hi all
Something it's tricky for me here, see my trigger I wrote below. What can I
do to insert c_code from center table INTO center_changed table with ONLY
the c_code where the update was made or where an INSERT of the new entry
INTO center table what made .
Let's say the center table has got the following values. When I try to
change c_dsc from KITWE to KIT where c_code ='0204' the trigger should take
cde 0204 and insert it into center_changed table with a time stamp. So the
main problem I have it's to populate the table called center_changed.
c_cde | c_desc | c_active
--------+------------------------------------------------+----------
0094 | GABORONE WAREHOUSE | f
0204 | KITWE | t
CREATE TABLE center_changed (
c_cde text NOT NULL,
stamp timestamp NOT NULL
);
CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS
$center_changed$
BEGIN
IF (TG_OP = 'UPDATE') THEN
INSERT INTO center_changed SELECT c_cde, now();
RETURN NEW;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO center_changed SELECT c_cde, now();
RETURN NEW;
END IF;
RETURN NULL;
END;
$center_changed$ LANGUAGE plpgsql;
CREATE TRIGGER center_changed
AFTER INSERT OR UPDATE ON center
FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
-----Original Message-----
From: Khangelani Gama [mailto:kgama@argility.com]
Sent: Wednesday, May 21, 2014 9:34 PM
To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
Thank you very much, I will have a look.
-----Original Message-----
From: Adrian Klaver [mailto:adrian.klaver@aklaver.com]
Sent: Wednesday, May 21, 2014 3:20 PM
To: Khangelani Gama; pgsql-general@postgresql.org
Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2
On 05/21/2014 02:54 AM, Khangelani Gama wrote:
> Hi
>
> I have a postgres 9 database, inside this database I need to create a
> new table called *center_changed* that gets inserted by any change
> that take place in a table called *center*. So I need to create
> trigger to do this.
>
> *Example: *
>
> Table name*: center*(c_cde, c_dsc, ops_cde, grp_cde);
>
> Now on the table called *center , *I need to create an INSERT and
> UPDATE trigger will insert the *c_cde * of the inserted or updated
> *center* into the *center_changed* table
>
> Please help me
>
> I have this syntax below, but please help me with the overall query.
>
> CREATE TRIGGER check_center
>
> BEFORE INSERT OR UPDATE
>
> ON *cente*r FOR EACH ROW
>
> EXECUTE PROCEDURE check_center_changes();
See here:
http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html
Example 40-4. A PL/pgSQL Trigger Procedure For Auditing
>
> Thanks
>
--
Adrian Klaver
adrian.klaver@aklaver.com
CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by
anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer
immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no
liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
Please help
-----Original Message-----
From: Khangelani Gama [mailto:kgama@argility.com]
Sent: Thursday, May 22, 2014 9:38 AM
To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
Hi all
Something it's tricky for me here, see my trigger I wrote below. What can I
do to insert c_code from center table INTO center_changed table with ONLY
the c_code where the update was made or where an INSERT of the new entry
INTO center table what made .
Let's say the center table has got the following values. When I try to
change c_dsc from KITWE to KIT where c_code ='0204' the trigger should take
cde 0204 and insert it into center_changed table with a time stamp. So the
main problem I have it's to populate the table called center_changed.
c_cde | c_desc | c_active
--------+------------------------------------------------+----------
0094 | GABORONE WAREHOUSE | f
0204 | KITWE | t
CREATE TABLE center_changed (
c_cde text NOT NULL,
stamp timestamp NOT NULL
);
CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS
$center_changed$
BEGIN
IF (TG_OP = 'UPDATE') THEN
INSERT INTO center_changed SELECT c_cde, now();
RETURN NEW;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO center_changed SELECT c_cde, now();
RETURN NEW;
END IF;
RETURN NULL;
END;
$center_changed$ LANGUAGE plpgsql;
CREATE TRIGGER center_changed
AFTER INSERT OR UPDATE ON center
FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
-----Original Message-----
From: Khangelani Gama [mailto:kgama@argility.com]
Sent: Wednesday, May 21, 2014 9:34 PM
To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
Thank you very much, I will have a look.
-----Original Message-----
From: Adrian Klaver [mailto:adrian.klaver@aklaver.com]
Sent: Wednesday, May 21, 2014 3:20 PM
To: Khangelani Gama; pgsql-general@postgresql.org
Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2
On 05/21/2014 02:54 AM, Khangelani Gama wrote:
> Hi
>
> I have a postgres 9 database, inside this database I need to create a
> new table called *center_changed* that gets inserted by any change
> that take place in a table called *center*. So I need to create
> trigger to do this.
>
> *Example: *
>
> Table name*: center*(c_cde, c_dsc, ops_cde, grp_cde);
>
> Now on the table called *center , *I need to create an INSERT and
> UPDATE trigger will insert the *c_cde * of the inserted or updated
> *center* into the *center_changed* table
>
> Please help me
>
> I have this syntax below, but please help me with the overall query.
>
> CREATE TRIGGER check_center
>
> BEFORE INSERT OR UPDATE
>
> ON *cente*r FOR EACH ROW
>
> EXECUTE PROCEDURE check_center_changes();
See here:
http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html
Example 40-4. A PL/pgSQL Trigger Procedure For Auditing
>
> Thanks
>
--
Adrian Klaver
adrian.klaver@aklaver.com
CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by
anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer
immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no
liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
Hi
My problem is on two lines, INSERT statements, I get an error saying c_cde
does not exist
INSERT INTO center_changed SELECT c_cde, now(); - My problem is here: I
get an error saying c_cde does not exist, I cant how I can give
center_change table the results. Center table has got many rows so I need
to only get c_cde for only the row that was updated
RETURN NEW;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO center_changed SELECT c_cde, now(); My problem is
here: I get an error saying c_cde does not exist, I cant how I can give
center_change table the results. Center table has got many rows so I need
to only get c_cde for only the row that was inserted.
-----Original Message-----
From: Andrew Sullivan [mailto:ajs@crankycanuck.ca]
Sent: Thursday, May 22, 2014 2:39 PM
To: Khangelani Gama
Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2
[off list]
I don't know about others, but I don't see what your problem is. Is the
problem that you are getting the new value in the center_changed table?
That's because you're doing an AFTER trigger ON UPDATE. So you have the
new values. Look at the special values NEW and OLD in the bit of the
manual about trigget functions?
A
On Thu, May 22, 2014 at 02:07:41PM +0200, Khangelani Gama wrote:
> Please help
>
> -----Original Message-----
> From: Khangelani Gama [mailto:kgama@argility.com]
> Sent: Thursday, May 22, 2014 9:38 AM
> To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
> Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
>
> Hi all
>
> Something it's tricky for me here, see my trigger I wrote below. What
> can I do to insert c_code from center table INTO center_changed table
> with ONLY the c_code where the update was made or where an INSERT of
> the new entry INTO center table what made .
>
>
> Let's say the center table has got the following values. When I try to
> change c_dsc from KITWE to KIT where c_code ='0204' the trigger should
> take cde 0204 and insert it into center_changed table with a time
> stamp. So the main problem I have it's to populate the table called
center_changed.
>
>
> c_cde | c_desc | c_active
> --------+------------------------------------------------+----------
> 0094 | GABORONE WAREHOUSE | f
> 0204 | KITWE | t
>
>
>
>
>
>
> CREATE TABLE center_changed (
> c_cde text NOT NULL,
> stamp timestamp NOT NULL
> );
>
> CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS
> $center_changed$
>
> BEGIN
>
> IF (TG_OP = 'UPDATE') THEN
> INSERT INTO center_changed SELECT c_cde, now();
> RETURN NEW;
> ELSIF (TG_OP = 'INSERT') THEN
> INSERT INTO center_changed SELECT c_cde, now();
> RETURN NEW;
> END IF;
> RETURN NULL;
> END;
> $center_changed$ LANGUAGE plpgsql;
>
> CREATE TRIGGER center_changed
> AFTER INSERT OR UPDATE ON center
> FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: Khangelani Gama [mailto:kgama@argility.com]
> Sent: Wednesday, May 21, 2014 9:34 PM
> To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
> Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
>
> Thank you very much, I will have a look.
>
> -----Original Message-----
> From: Adrian Klaver [mailto:adrian.klaver@aklaver.com]
> Sent: Wednesday, May 21, 2014 3:20 PM
> To: Khangelani Gama; pgsql-general@postgresql.org
> Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2
>
> On 05/21/2014 02:54 AM, Khangelani Gama wrote:
> > Hi
> >
> > I have a postgres 9 database, inside this database I need to create
> > a new table called *center_changed* that gets inserted by any change
> > that take place in a table called *center*. So I need to create
> > trigger to do this.
> >
> > *Example: *
> >
> > Table name*: center*(c_cde, c_dsc, ops_cde, grp_cde);
> >
> > Now on the table called *center , *I need to create an INSERT and
> > UPDATE trigger will insert the *c_cde * of the inserted or updated
> > *center* into the *center_changed* table
> >
> > Please help me
> >
> > I have this syntax below, but please help me with the overall query.
> >
> > CREATE TRIGGER check_center
> >
> > BEFORE INSERT OR UPDATE
> >
> > ON *cente*r FOR EACH ROW
> >
> > EXECUTE PROCEDURE check_center_changes();
>
> See here:
>
> http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html
>
> Example 40-4. A PL/pgSQL Trigger Procedure For Auditing
>
> >
> > Thanks
> >
>
> --
> Adrian Klaver
> adrian.klaver@aklaver.com
>
>
> CONFIDENTIALITY NOTICE
> The contents of and attachments to this e-mail are intended for the
> addressee only, and may contain the confidential information of
> Argility (Proprietary) Limited and/or its subsidiaries. Any review,
> use or dissemination thereof by anyone other than the intended
> addressee is prohibited.If you are not the intended addressee please
notify the writer immediately and destroy the e-mail. Argility
(Proprietary) Limited and its subsidiaries distance themselves from and
accept no liability for unauthorised use of their e-mail facilities or
e-mails sent other than strictly for business purposes.
>
>
>
> --
> Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To
> make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-general
--
Andrew Sullivan
ajs@crankycanuck.ca
CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by
anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer
immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no
liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
On 22/05/2014 13:48, Khangelani Gama wrote: > Hi > > My problem is on two lines, INSERT statements, I get an error saying c_cde > does not exist > > INSERT INTO center_changed SELECT c_cde, now(); - My problem is here: I > get an error saying c_cde does not exist, I cant how I can give You need to specify where c_cde is coming from - so OLD.c_cde or NEW.c_cde (or else SELECT .... FROM... if it's coming from somewhere else). Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@iol.ie
Thanks , I will try that -----Original Message----- From: Raymond O'Donnell [mailto:rod@iol.ie] Sent: Thursday, May 22, 2014 2:54 PM To: Khangelani Gama; Andrew Sullivan; pgsql-general@postgresql.org Subject: Re: [GENERAL] Need help on triggers - postgres 9.1.2 On 22/05/2014 13:48, Khangelani Gama wrote: > Hi > > My problem is on two lines, INSERT statements, I get an error saying > c_cde does not exist > > INSERT INTO center_changed SELECT c_cde, now(); - My problem is here: I > get an error saying c_cde does not exist, I cant how I can give You need to specify where c_cde is coming from - so OLD.c_cde or NEW.c_cde (or else SELECT .... FROM... if it's coming from somewhere else). Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@iol.ie CONFIDENTIALITY NOTICE The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by anyone other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer immediately and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no liability for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
> > -----Original Message-----
> > From: Khangelani Gama [mailto:kgama@argility.com]
> > Sent: Thursday, May 22, 2014 9:38 AM
> > To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
> > Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
> >
> > Hi all
> >
> > Something it's tricky for me here, see my trigger I wrote below. What
> > can I do to insert c_code from center table INTO center_changed table
> > with ONLY the c_code where the update was made or where an INSERT of
> > the new entry INTO center table what made .
> >
> >
> > Let's say the center table has got the following values. When I try to
> > change c_dsc from KITWE to KIT where c_code ='0204' the trigger should
> > take cde 0204 and insert it into center_changed table with a time
> > stamp. So the main problem I have it's to populate the table called
> center_changed.
> >
> >
> > c_cde | c_desc | c_active
> > --------+------------------------------------------------+----------
> > 0094 | GABORONE WAREHOUSE | f
> > 0204 | KITWE | t
> >
> >
> >
> >
> >
> >
> > CREATE TABLE center_changed (
> > c_cde text NOT NULL,
> > stamp timestamp NOT NULL
> > );
> >
> > CREATE OR REPLACE FUNCTION check_center_changes() RETURNS
> TRIGGER AS
> > $center_changed$
> >
> > BEGIN
> >
> > IF (TG_OP = 'UPDATE') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > ELSIF (TG_OP = 'INSERT') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > END IF;
> > RETURN NULL;
> > END;
> > $center_changed$ LANGUAGE plpgsql;
> >
> > CREATE TRIGGER center_changed
> > AFTER INSERT OR UPDATE ON center
> > FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
> >
This should work:
CREATE OR REPLACE FUNCTION check_center_changes() RETURNS
TRIGGER AS $center_changed$
BEGIN
INSERT INTO center_changed VALUES(new.c_cde, now());
RETURN NEW;
END;
$center_changed$ LANGUAGE plpgsql;
CREATE TRIGGER center_changed
AFTER INSERT OR UPDATE ON center
FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
Regards,
Igor Neyman
On Thu, May 22, 2014 at 02:48:48PM +0200, Khangelani Gama wrote: > > CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS > > $center_changed$ > > > > BEGIN > > > > IF (TG_OP = 'UPDATE') THEN > > INSERT INTO center_changed SELECT c_cde, now(); PostgreSQL probably refuses to take wild guesses where "c_cde" might come from. You need to tell it. Karsten -- GPG key ID E4071346 @ gpg-keyserver.de E167 67FD A291 2BEA 73BD 4537 78B9 A9F9 E407 1346
Many Thanks, I will try it now
-----Original Message-----
From: Igor Neyman [mailto:ineyman@perceptron.com]
Sent: Thursday, May 22, 2014 2:55 PM
To: Khangelani Gama; Andrew Sullivan; pgsql-general@postgresql.org
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
> > -----Original Message-----
> > From: Khangelani Gama [mailto:kgama@argility.com]
> > Sent: Thursday, May 22, 2014 9:38 AM
> > To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
> > Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
> >
> > Hi all
> >
> > Something it's tricky for me here, see my trigger I wrote below.
> > What can I do to insert c_code from center table INTO
> > center_changed table with ONLY the c_code where the update was made
> > or where an INSERT of the new entry INTO center table what made .
> >
> >
> > Let's say the center table has got the following values. When I try
> > to change c_dsc from KITWE to KIT where c_code ='0204' the trigger
> > should take cde 0204 and insert it into center_changed table with a
> > time stamp. So the main problem I have it's to populate the table
> > called
> center_changed.
> >
> >
> > c_cde | c_desc | c_active
> > --------+------------------------------------------------+----------
> > 0094 | GABORONE WAREHOUSE | f
> > 0204 | KITWE | t
> >
> >
> >
> >
> >
> >
> > CREATE TABLE center_changed (
> > c_cde text NOT NULL,
> > stamp timestamp NOT NULL
> > );
> >
> > CREATE OR REPLACE FUNCTION check_center_changes() RETURNS
> TRIGGER AS
> > $center_changed$
> >
> > BEGIN
> >
> > IF (TG_OP = 'UPDATE') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > ELSIF (TG_OP = 'INSERT') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > END IF;
> > RETURN NULL;
> > END;
> > $center_changed$ LANGUAGE plpgsql;
> >
> > CREATE TRIGGER center_changed
> > AFTER INSERT OR UPDATE ON center
> > FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
> >
This should work:
CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS
$center_changed$ BEGIN
INSERT INTO center_changed VALUES(new.c_cde, now());
RETURN NEW;
END;
$center_changed$ LANGUAGE plpgsql;
CREATE TRIGGER center_changed
AFTER INSERT OR UPDATE ON center
FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
Regards,
Igor Neyman
CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by
anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer
immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no
liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.
On 05/22/2014 06:01 AM, Khangelani Gama wrote: > Many Thanks, I will try it now > In the link I sent previously: http://www.postgresql.org/docs/9.3/interactive/plpgsql-trigger.html there is a handy section (40.9.1. Triggers on data changes) that explains what information is available to a plpgsql trigger and how to access it. Might help to take out some of the mystery of what is going on. -- Adrian Klaver adrian.klaver@aklaver.com
Thank you very much to everyone, it worked
-----Original Message-----
From: Khangelani Gama [mailto:kgama@argility.com]
Sent: Thursday, May 22, 2014 3:01 PM
To: 'Igor Neyman'; 'Andrew Sullivan'; 'pgsql-general@postgresql.org'
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
Many Thanks, I will try it now
-----Original Message-----
From: Igor Neyman [mailto:ineyman@perceptron.com]
Sent: Thursday, May 22, 2014 2:55 PM
To: Khangelani Gama; Andrew Sullivan; pgsql-general@postgresql.org
Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
> > -----Original Message-----
> > From: Khangelani Gama [mailto:kgama@argility.com]
> > Sent: Thursday, May 22, 2014 9:38 AM
> > To: 'Adrian Klaver'; 'pgsql-general@postgresql.org'
> > Subject: RE: [GENERAL] Need help on triggers - postgres 9.1.2
> >
> > Hi all
> >
> > Something it's tricky for me here, see my trigger I wrote below.
> > What can I do to insert c_code from center table INTO
> > center_changed table with ONLY the c_code where the update was made
> > or where an INSERT of the new entry INTO center table what made .
> >
> >
> > Let's say the center table has got the following values. When I try
> > to change c_dsc from KITWE to KIT where c_code ='0204' the trigger
> > should take cde 0204 and insert it into center_changed table with a
> > time stamp. So the main problem I have it's to populate the table
> > called
> center_changed.
> >
> >
> > c_cde | c_desc | c_active
> > --------+------------------------------------------------+----------
> > 0094 | GABORONE WAREHOUSE | f
> > 0204 | KITWE | t
> >
> >
> >
> >
> >
> >
> > CREATE TABLE center_changed (
> > c_cde text NOT NULL,
> > stamp timestamp NOT NULL
> > );
> >
> > CREATE OR REPLACE FUNCTION check_center_changes() RETURNS
> TRIGGER AS
> > $center_changed$
> >
> > BEGIN
> >
> > IF (TG_OP = 'UPDATE') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > ELSIF (TG_OP = 'INSERT') THEN
> > INSERT INTO center_changed SELECT c_cde, now();
> > RETURN NEW;
> > END IF;
> > RETURN NULL;
> > END;
> > $center_changed$ LANGUAGE plpgsql;
> >
> > CREATE TRIGGER center_changed
> > AFTER INSERT OR UPDATE ON center
> > FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
> >
This should work:
CREATE OR REPLACE FUNCTION check_center_changes() RETURNS TRIGGER AS
$center_changed$ BEGIN
INSERT INTO center_changed VALUES(new.c_cde, now());
RETURN NEW;
END;
$center_changed$ LANGUAGE plpgsql;
CREATE TRIGGER center_changed
AFTER INSERT OR UPDATE ON center
FOR EACH ROW EXECUTE PROCEDURE check_center_changes();
Regards,
Igor Neyman
CONFIDENTIALITY NOTICE
The contents of and attachments to this e-mail are intended for the addressee only, and may contain the confidential
information of Argility (Proprietary) Limited and/or its subsidiaries. Any review, use or dissemination thereof by
anyone
other than the intended addressee is prohibited.If you are not the intended addressee please notify the writer
immediately
and destroy the e-mail. Argility (Proprietary) Limited and its subsidiaries distance themselves from and accept no
liability
for unauthorised use of their e-mail facilities or e-mails sent other than strictly for business purposes.