James's Blog

Oracle: Bulk Collect

DECLARE
TYPE EmpCurTyp IS REF CURSOR;
TYPE NumList IS TABLE OF NUMBER;
TYPE NameList IS TABLE OF VARCHAR2(15);
emp_cv EmpCurTyp;
empnos NumList;
enames NameList;
sals NumList;
BEGIN
OPEN emp_cv FOR 'SELECT empno, ename FROM emp';
FETCH emp_cv BULK COLLECT INTO empnos, enames;
CLOSE emp_cv;

EXECUTE IMMEDIATE 'SELECT sal FROM emp'
BULK COLLECT INTO sals;
END;


--- only insert/update/delete can have output bind variables.
--- to bulk-bind them, use BULK RETURNING INTO clause in an EXECUTE IMMEDIATE.

DECLARE
TYPE NameList IS TABLE OF VARCHAR2(15);
enames NameList;
bonus_amt NUMBER := 500;
sql_stmt VARCHAR(200);
BEGIN
sql_stmt := 'UPDATE emp SET bonus = :1 RETURNING ename INTO :2';
EXECUTE IMMEDIATE sql_stmt
USING bonus_amt RETURNING BULK COLLECT INTO enames;
END;

posted by James Pei @ 9:06 PM