Bulck collection data update just hangs.
Each no problem with anonymous block below? Can someone direct me to optimize this code. Scenario of having to update about 40 million lines to static value, I agree 1 million lines in a single loop. 1 million first lines are getting updated very soon probably in 2 minute, after that the hungs just code and I do not increase in the committed rows.Declare
cursor c1 is
Select the rowid of the t1
where c1 is not null;
TYPE t_rowid IS the TABLE OF the INDEX of ROWID OF directory;
v_rowid t_rowid;
Start
OPEN c1;
LOOP
FETCH c1 COLLECT LOOSE v_rowid LIMIT 1000000;
WHEN OUTPUT v_rowid.count = 0;
FORALL i in 1.v_rowid.count
setting a day of t1 set c1 = 'seda54t557790890778689890' where rowid = v_rowid (i);
commit;
end loop;
commit;
Close c1;
end;
Never engage inside the loop
Do it in SQL
update t1 set c1 = 'seda54t557790890778689890' where ROWID IN (select rowid from t1 where c1 is not NULL);
commit;
If you want to use SQL PL then
BEGIN
FOR i IN
(
select rowid from t1
where c1 is not NULL
)
LOOP
update t1 set c1 = 'seda54t557790890778689890' where rowid=i.rowid;
END LOOP;
COMMIT;
END;
Tags: Database
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