Help required for an insert logic

Question

Hi
I need to create an insert logic in the following way..
suppose my table has 20000 rows to insert in tab1 table
but due to very small undo table space size i need to insert small amount of rows between two commits..
say 20000/10 = 2000 rows i need to insert in the table in each commit.
so
for i in 1 .. 10 loop
insert into tab1 values act_data(i); --- here in each insert i need to insert 2000 rows
commit;
end loop;
act_data(i) is the collection containing whole data.
Hope i could express my problem
Thanks in advance.

Answer 1

You seem to already have a working answer to your question but your sample code contains one of the worse coding errors you could make.
Never commit inside a loop.
Committing every 2000 rows does much more (not in a good way) than make things slower ... read Tom Kyte's many comments about why this should not be done.
An insert from an array such as you seem to have should be done using FORALL.
http://www.morganslibrary.org/reference/array_processing.html#apfa