How To Open a Cursor Variable

Q

How To Open a Cursor Variable? - Oracle DBA FAQ - Working with Cursors in PL/SQL

✍: FYIcenter.com

A

A cursor variable must be opened with a specific query statement before you can fetch data fields from its data rows. To open a cursor variable, you can use the OPEN ... FOR statement as shown in the following tutorial exercise:

CREATE OR REPLACE PROCEDURE FYI_CENTER AS
  TYPE emp_ref IS REF CURSOR RETURN employees%ROWTYPE;
  TYPE any_ref IS REF CURSOR;
  emp_cur emp_ref;
  any_cur any_ref;
  sys_cur SYS_REFCURSOR;
BEGIN
  OPEN emp_cur FOR SELECT * FROM employees;
  OPEN any_cur FOR SELECT * FROM employees;
  OPEN sys_cur FOR SELECT * FROM employees;
  CLOSE sys_cur;
  CLOSE any_cur;
  CLOSE emp_cur;
END;
/

2007-04-28, 4552👍, 0💬