Oracle PL/SQL - %FOUND Attribute: Has a Row Been Fetched?

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Introduction

%FOUND returns the following values:

  • NULL after the explicit cursor is opened but before the first fetch
  • TRUE if the most recent fetch from the explicit cursor returned a row
  • FALSE otherwise

%FOUND tells if there is a fetched row to process.

The following code loops through a result set, printing each fetched row and exiting when there are no more rows to fetch.

Demo

SQL>
SQL> drop table emp;

Table dropped.-- from w ww. j av  a 2s.c o  m

SQL> CREATE TABLE emp(
  2  empid NUMBER(6),
  3  first_name VARCHAR2(20),
  4  last_name VARCHAR2(25),
  5  email VARCHAR2(25),
  6  phone_number VARCHAR2(20),
  7  hire_date DATE,
  8  job_id VARCHAR2(10),
  9  salary NUMBER(8,2),
 10  commission_pct NUMBER(2,2),
 11  manager_id NUMBER(6),
 12  department_id NUMBER(4)) ;
SQL>
SQL> INSERT INTO emp VALUES( 100, 'Steven', 'King', 'SKING', '123.123.4567', TO_DATE('17-JUN-2000', 'dd-MON-yyyy'), 'CODER', 24000, NULL, NULL, 10);
SQL> INSERT INTO emp VALUES( 200, 'Joe', 'Lee', 'abc', '123.123.9999', TO_DATE('17-JUN-2010', 'dd-MON-yyyy'), 'TESTER', 25000, NULL, NULL, 20);
SQL>
SQL>
SQL> DECLARE
  2    CURSOR c1 IS
  3      SELECT last_name, salary FROM emp;
  4
  5    my_ename   emp.last_name%TYPE;
  6    my_salary  emp.salary%TYPE;
  7  BEGIN
  8    OPEN c1;
  9    LOOP
 10      FETCH c1 INTO my_ename, my_salary;
 11      IF c1%FOUND THEN  -- fetch succeeded
 12        DBMS_OUTPUT.PUT_LINE('Name = ' || my_ename || ', salary = ' || my_salary);
 13      ELSE  -- fetch failed
 14        EXIT;
 15      END IF;
 16    END LOOP;
 17  END;
 18  /
Name = King, salary = 24000
Name = Lee, salary = 25000

PL/SQL procedure successfully completed.

SQL>

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