How do I use bulk collect and insert in Pl/SQl

Question

I want to fetch around 6 millions rows from one table and insert them all into another table. How do I do it using BULK COLLECT and FORALL ?

Answer 1

oracle

Below is an example From

CREATE OR REPLACE PROCEDURE fast_way IS

TYPE PartNum IS TABLE OF parent.part_num%TYPE
INDEX BY BINARY_INTEGER;
pnum_t PartNum;

TYPE PartName IS TABLE OF parent.part_name%TYPE
INDEX BY BINARY_INTEGER;
pnam_t PartName;

BEGIN
  SELECT part_num, part_name
  BULK COLLECT INTO pnum_t, pnam_t
  FROM parent;

  FOR i IN pnum_t.FIRST .. pnum_t.LAST
  LOOP
    pnum_t(i) := pnum_t(i) * 10;
  END LOOP;

  FORALL i IN pnum_t.FIRST .. pnum_t.LAST
  INSERT INTO child
  (part_num, part_name)
  VALUES
  (pnum_t(i), pnam_t(i));
  COMMIT;
END