Gathering histogram manually in oracle

Question

Hi,
I need to create the histrogram manually in oracle 10g DB. When i execute the following pl/ sql block i was getting the "PLS-00306: wrong number or types of arguments in call to 'PREPARE_COLUMN_VALUES'".
I want to pass the V_arr value from test2 table to DBMS_STATS.prepare_column_values procedure.
It would be grateful if this can resolve it.
SELECT *
FROM test2;
CREATE TABLE test2(num1 NUMBER,num2 NUMBER,num3 NUMBER);
INSERT INTO test2
VALUES (1, 1000, 3);
INSERT INTO test2
VALUES (2, 2000, 3);
INSERT INTO test2
VALUES (3, 3000, 3);
COMMIT ;
SELECT *
FROM test2;
DECLARE
l_rec DBMS_STATS.statrec;
l_array DBMS_STATS.numarray;
TYPE arr IS VARRAY (256) OF test2%ROWTYPE;
v_arr arr := arr ();
ind NUMBER;
v_arr1 NUMBER;
CURSOR cur
IS
SELECT *
FROM test2;
BEGIN
ind := 0;
l_rec.bkvals := DBMS_STATS.numarray (1000, 2000, 3000);
l_rec.epc := 3;
FOR i IN cur
LOOP
ind := ind + 1;
v_arr.EXTEND ();
v_arr (ind).num1 := i.num1;
END LOOP;
DBMS_STATS.prepare_column_values (l_rec, v_arr);
END;

Answer 1

Hi,
You call the PREPARE_COLUMN_VALUES with wrong arguments. Try this one:
DECLARE
   l_rec     DBMS_STATS.statrec;
   l_array   DBMS_STATS.numarray;
--   TYPE arr IS VARRAY (256) OF test2%ROWTYPE;
--   v_arr     arr                 := arr ();
   v_arr   DBMS_STATS.numarray;  
   ind       NUMBER;
   v_arr1    NUMBER;
   CURSOR cur
   IS
      SELECT *
        FROM test2;
BEGIN
   ind := 0;
   l_rec.bkvals := DBMS_STATS.numarray (1000, 2000, 3000);
   v_arr := DBMS_STATS.numarray();
   l_rec.epc := 3;
   FOR i IN cur
   LOOP
      ind := ind + 1;
      v_arr.EXTEND ();
      v_arr (ind)  := i.num1;
   END LOOP;
   DBMS_STATS.prepare_column_values (l_rec, v_arr);
END;Regards
Gokhan