Please help -----Original Message----- From: Khangelani Gama [mailto:kgama@xxxxxxxxxxxx] Sent: Thursday, May 22, 2014 9:38 AM To: 'Adrian Klaver'; 'pgsql-general@xxxxxxxxxxxxxx' 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@xxxxxxxxxxxx] Sent: Wednesday, May 21, 2014 9:34 PM To: 'Adrian Klaver'; 'pgsql-general@xxxxxxxxxxxxxx' 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@xxxxxxxxxxx] Sent: Wednesday, May 21, 2014 3:20 PM To: Khangelani Gama; pgsql-general@xxxxxxxxxxxxxx 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@xxxxxxxxxxx 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.
