Ora 01403 when try to insert data into oracle table - oracle

Question

I have the following trigger
CREATE OR REPLACE TRIGGER L_BIUR_G_LAY
BEFORE INSERT OR UPDATE ON G_LAY
FOR EACH ROW
When (new.g_roo is not null)
DECLARE
x number(1);
stmt varchar(255);
BEGIN
FOR I IN (SELECT DISTINCT G_TAB FROM G_LEG)
LOOP
stmt := 'select distinct g_lind from ' || i.g_tab || ' where g_roo = ' || :new.g_roo;
Execute immediate stmt into x;
IF (x<>0) THEN
RAISE_APPLICATION_ERROR(-2001, 'G_ROO cannot be inserted where G_LIND IS NOT ZERO');
END IF;
END LOOP;
END;
/
and when I do
insert into G_LAY (G_OGCS, G_OGC, G_ROO, G_NM, G_TI, G_AB, G_DATE)
(select G_LAY_SEQ.NEXTVAL, 1, G_ROO, G_LGNDIT, G_UNE, 'Pipe Data Long - ' || G_UR, sysdate
from G_DTABLE where G_LIND = 0);
I get the following error
Error report:
SQL Error: ORA-01403: no data found
ORA-06512: at "L_BIUR_G_LAY", line 10
ORA-04088: error during execution of trigger 'G_LAY'
01403. 00000 - "no data found"
Any help would be greatly appreciated. It tried PRAGMA AUTONOMOUS_TRANSACTION after Declare in my trigger but it didn't help me

Answer 1

The problem is not with your INSERT statement. The problem occurs when the dynamically-built SELECT statement in the trigger is executed - no data is found so an ORA-01403 is raised. It looks to me like the easiest thing to do would be to do a SELECT COUNT(...):
CREATE OR REPLACE TRIGGER L_BIUR_G_LAY
BEFORE INSERT OR UPDATE ON G_LAY
FOR EACH ROW
When (new.g_rowno is not null)
DECLARE
x number;
stmt varchar(255);
BEGIN
FOR I IN (SELECT DISTINCT G_DISPCNTRLTAB FROM G_LEG) LOOP
stmt := 'select COUNT(*) from ' || i.g_dispcntrltab ||
' where g_rowno = ' || :new.g_rowno ||
' and g_lind <> 0';
Execute immediate stmt into x;
IF x <> 0 THEN
RAISE_APPLICATION_ERROR(-20001, 'G_RWNO cannot be inserted where G_LIND IS NOT ZERO');
END IF;
END LOOP;
END L_BIUR_G_LAY;
I also changed the error number which is raised as -2001 is not in the range of errors which can be raised using RAISE_APPLICATION_ERROR (the valid range is -20000 to -20999).
Share and enjoy.