After select stmt. why the count value of variable column, nested table is zero.
CREATE OR REPLACE TYPE numbers_typeARRAY OF INTEGER
/
CREATE OR REPLACE PROCEDURE p(i) in FULL IS
numbers1 numbers_type: = numbers_type (1,2,3,4,5);
BEGIN
DBMS_OUTPUT. Put_line ("exposed before SELECTING");
DBMS_OUTPUT. Put_line('numbers1.) COUNT() = ' | numbers1. COUNT());
FOR j IN 1.numbers1. COUNT() LOOP
DBMS_OUTPUT. Put_line ('numbers1 (' | j |)) ') = ' || numbers1 (j));
END LOOP;
-Auto selection clause to COLLECT LOOSE:
SELECT a.COLUMN_VALUE
LOOSE COLLECTION numbers1
TABLE (numbers1) one
WHERE a.COLUMN_VALUE > p.i
ORDER BY a.COLUMN_VALUE;
DBMS_OUTPUT. Put_line ("presentation and SELECT '");
DBMS_OUTPUT. Put_line('numbers1.) COUNT() = ' | numbers1. COUNT());
END p;
/
Call p:
BEGIN
p (2);
END;
/
Hello
Before taking in the collection variable, the values of the variables are fushed. So in this case the numbers1 is empty so it becomes zero and trying to read values from this collection which is already empty.
That's why you get the number zero
PRABHU
Tags: Database
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