Query abort with ora-30036 after more than 20 hours and 180g of undo

Question

Dear all,
A developper transmits me a query. It fails after more than 20 hours and an undotbs of 180g (i change undo-retention, size of undo tbs, without results). That query makes a lot of inserts. How can i rewrite it to be more performant (my database is on 10.2.0.3 and i can't change it).
here's the query :
set serveroutput on size unlimited
set pages 0
set trims on
set lines 1000
set feed off
set pagesize 50
set linesize 1000
set head off
set echo off
set verify off
set feedback off
WHENEVER SQLERROR EXIT SQL.SQLCODE
DECLARE
v_annee VARCHAR(4) := '2012';     
v_dkm_id NUMBER := '108';
v_entretien NUMBER;
v_nb_feuilles_cr NUMBER := 0;
v_nb_etats_cr NUMBER := 0;
v_action_id NUMBER;
v_rm_id NUMBER;
v_personne_id NUMBER;
CURSOR c_evaluation IS
     SELECT E.ID# AS E_ID, W.ID# AS WF_ID , E.NATURE_ECHELON AS ECHELON
     FROM T_EVALUATION E
     JOIN T_DKM_LOCALE L ON L.ID#=E.DKM_LOCALE_ID
     JOIN T_WORKFLOW W ON (W.CODE=E.CODE_WORKFLOW_INITIAL AND W.ANNEE=v_annee )
     WHERE L.DKM_NAT_ID=v_dkm_id;
r_evaluation c_evaluation%ROWTYPE;
BEGIN
SELECT ID#
INTO v_personne_id
FROM T_PERSONNE
WHERE ID_FONCTIONNEL = 'herve.collin';
dbms_output.put_line('===== MAJ evaluations / statut_harmo_shd =============');
dbms_output.put_line('===== Creation des feuilles ==========================');
SELECT ID# MOTIF_ID
INTO v_entretien
FROM T_REF_MOTIF_TENUE_ENTRETIEN
WHERE CODE='PLA';
OPEN c_evaluation;
LOOP
     FETCH c_evaluation INTO r_evaluation;
     EXIT WHEN c_evaluation%NOTFOUND;
IF r_evaluation.ECHELON = 'T'
THEN
SELECT ID#
INTO v_rm_id
FROM T_REF_REDUCMAJO
WHERE ANNEE = v_annee
AND CATEGORIE_GRADE = 'ET'
AND CODE = 'V1';
END IF;
IF r_evaluation.ECHELON = 'F' OR r_evaluation.ECHELON = 'V'
THEN
SELECT ID#
INTO v_rm_id
FROM T_REF_REDUCMAJO
WHERE ANNEE = v_annee
AND CATEGORIE_GRADE = 'FV'
AND CODE = 'R1';
END IF;
UPDATE T_EVALUATION
SET STATUT_HARMO_SHD = 'C' , REF_REDUCMAJO_PROP_SHD_ID = v_rm_id
WHERE DKM_LOCALE_ID IN ( SELECT ID# FROM T_DKM_LOCALE WHERE DKM_NAT_ID = v_dkm_id );
INSERT INTO T_FEUILLE(ID#, REF_MOTIF_TENUE_ENT_ID, EVALUATION_ID, WORKFLOW_ID)
VALUES (S_FEUILLE.NEXTVAL , v_entretien , r_evaluation.E_ID, r_evaluation.WF_ID);
v_nb_feuilles_cr := v_nb_feuilles_cr + 1;
END LOOP;
CLOSE c_evaluation;
dbms_output.put_line(' -> '||v_nb_feuilles_cr||' feuilles crees');
COMMIT;
END;
set serveroutput off
exit
What is the bester choice ? drop the indexes on the table before insert, start the insert without fetching the data in cursor ?
nb: sorry for my bad english
Best regards
Catherine Andre
@mail: [email protected]

Answer 1

user4443606 wrote:
Thanks for your reply !
I'll try to grow the undo tbs space but i stay convinced that the problem is in the query.You can be convinced & wrong at the same time.
row by row INSERT is slow by slow.
It can be done as single INSERT; but that won't change the amount of UNDO that is required.