Cant commit in trigger

Question

Hi
I am trying to get around mutating table problem. I have a before trigger on tableA that calls a procedure that creates a temp global table to store the :new values updated on tableA.
Here is the trigger code and the procedure code..
Anyone know what the problem is..
Thanks
create or replace trigger postaladdress_before
before insert or update
OF ADDRESS1 ,ADDRESS2 ,ADDRESS3 ,ADDRESS4 ,ADDRESS5 ,ADDRESS6 ,ADDRESS7
on tocpostaladdress
for each row
begin
postcode_temp_work ('new',:new.c, :new.i, :new.ADDRESS1 ,:new.ADDRESS2 ,:new.ADDRESS3 ,:new.ADDRESS4 ,:new.ADDRESS5 ,:new.ADDRESS6 ,:new.ADDRESS7);
end;
CREATE OR REPLACE Procedure postcode_temp_work ( tmode IN varchar2,pc IN Number, piin in Number, pADDRESS1 IN varchar2 ,pADDRESS2 IN varchar2 ,pADDRESS3 IN varchar2 , pADDRESS4 IN varchar2 ,pADDRESS5 IN varchar2 ,pADDRESS6 IN varchar2 ,pADDRESS7 IN varchar2 )
IS
          vc NUMBER := pc;
          vi NUMBER := piin;
          vaddress1 VARCHAR2(40) := pADDRESS1;
          vaddress2 VARCHAR2(40) := pADDRESS2;
          vaddress3 VARCHAR2(40) := pADDRESS3;
          vaddress4 VARCHAR2(40) := pADDRESS4;
          vaddress5 VARCHAR2(40) := pADDRESS5;
          vaddress6 VARCHAR2(40) := pADDRESS6;
          vaddress7 VARCHAR2(40) := pADDRESS7;
          vtmode VARCHAR2(40) := tmode;
BEGIN
     dbms_output.put_line(vc);
     dbms_output.put_line(vi);
     dbms_output.put_line(vaddress1);
     IF vtmode = 'new' THEN
     EXECUTE IMMEDIATE 'CREATE GLOBAL TEMPORARY TABLE t_my_postcode_update ( c NUMBER, i NUMBER, address1 VARCHAR2(40), address2 VARCHAR2(40), address3 VARCHAR2(40), address4 VARCHAR2(40), address5 VARCHAR2(40), address6 VARCHAR2(40), address7 VARCHAR2(40) )';
     EXECUTE IMMEDIATE( 'Insert into t_my_postcode_update ( C, I, ADDRESS1, ADDRESS2, ADDRESS3, ADDRESS4, ADDRESS5, ADDRESS6, ADDRESS7)values( '''|| vc || ''' ,''' || vi || ''',''' || vaddress1 || ''' , ''' || vaddress2 || ''','''|| vaddress3||''' ,'''|| vaddress4 ||''' ,'''|| vaddress5||''' ,'''|| vaddress6||''' ,'''|| vaddress7||''')');
     END IF;
     IF vtmode = 'kill' THEN
     EXECUTE IMMEDIATE 'DROP TABLE t_my_postcode_update';
     END IF;
END;
show errors;

Answer 1

superkav wrote:
EXECUTE IMMEDIATE 'CREATE GLOBAL TEMPORARY TABLE
EXECUTE IMMEDIATE 'DROP TABLE
I realise its not the best way to do it. However Its how the customer want it..
Well, create a temporary table on the fly cannot be a customer requirement, is it ?
1. it is often a lack of Oracle knowledge to make such thing, especially people coming from MS SQL.
2. you could give some good advices to your client about the Oracle technical behaviour
A global temporary table should exists in a permanent fashion. The data are volatile (transaction or session) which is why the GTT exists, but the GTT must exists permanently.
Then you should think about multi-session env, what'll happen if with the same user account, two people are connected, one is making a new, one is making a kill ? One of them, do not say both of them, will be in trouble. Without saying about the possible nightmare to debug dynamic sql - especially inside a trigger - especially for "temporary" object.
In many place such horrible code could not be installed in UAT env, even less in production.
Nicolas.