Re: Before Insert SQL Trigger can't use INSERT or UPDATE statements?

Why not do it on an AFTER trigger where you can do all that stuff
including updating the inserted row with the new id value?

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Charles Wilt
Sent: Thursday, March 11, 2010 7:11 AM
To: Midrange Systems Technical Discussion
Subject: Before Insert SQL Trigger can't use INSERT or UPDATE
statements?

All,

I was putting together a Before Insert SQL Trigger and was suprised to
learn that it can't use the INSERT or UPDATE statements...you get an
SQL0751 error:

 -- Statements not allowed in an SQL BEFORE trigger are INSERT, UPDATE,
DELETE, ALTER TABLE, COMMENT ON, CREATE, DROP, GRANT, LABEL ON, RENAME,
REVOKE, REFRESH TABLE, and ALTER PROCEDURE.

What I was trying to do (error handling omitted, also note FILEB has an
identity column FILEB_ID)

create trigger FILEA_BEFORE_INSERT
 before insert on FILEA
 referencing NEW ROW as new_row
 for each row mode DB2ROW

begin
 if new_row.fileb_id = 0 then
   insert into FILEB (fld1, fl2, fld3)
       values (new_row.fld1, new_row.fld2, new_row.fld3);
   new_row.fileb_id = indentity_val_local();
 else
   update  FILEB
    set (fld1, fld2, fld3) =  (new_row.fld1, new_row.fld2,
new_row.fld3)
   where FILEB_ID = new_row.FILEB_ID;
 end if;
end

I guess I'm going to have to use RPG for the trigger?

Charles
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