ORA-06531 efter Oracle-uppgradering

Detta fel:

ORA-06531: Reference to uninitialized collection

betyder att du har en samling som inte initieras innan du använder den, till exempel:

SQL> select banner from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production

SQL> ed
Wrote file afiedt.buf

  1  CREATE OR REPLACE TYPE t_employee AS OBJECT(
  2    id  number,
  3    name VARCHAR2(300),
  4    CONSTRUCTOR FUNCTION t_employee RETURN SELF AS RESULT
  5* )
SQL> /

Type created.

SQL> ed
Wrote file afiedt.buf

  1* CREATE OR REPLACE TYPE t_employees AS TABLE OF t_employee
SQL> /

Type created.

SQL> ed
Wrote file afiedt.buf

  1  DECLARE
  2    l_emp t_employee;
  3    l_emps t_employees;
  4  BEGIN
  5    for i in (SELECT employee_id, first_name
  6                FROM employees)
  7    loop
  8      l_emp := t_employee(i.employee_id, i.first_name);
  9      l_emps.extend();
 10      l_emps(l_emps.COUNT) := l_emp;
 11    end loop;
 12    DBMS_OUTPUT.put_line(l_emps(4).name);
 13* END;
SQL> /
DECLARE
*
ERROR at line 1:
ORA-06531: Reference to uninitialized collection
ORA-06512: at line 9

Som du kan se har jag ORA-06531 fel, det beror på att jag inte har initierat l_emps variabel, jag måste lägga till l_emps := t_employees(); :

SQL> ed
Wrote file afiedt.buf

  1  DECLARE
  2    l_emp t_employee;
  3    l_emps t_employees;
  4  BEGIN
  5    l_emps := t_employees();
  6    for i in (SELECT employee_id, first_name
  7                FROM employees)
  8    loop
  9      l_emp := t_employee(i.employee_id, i.first_name);
 10      l_emps.extend();
 11      l_emps(l_emps.COUNT) := l_emp;
 12    end loop;
 13    DBMS_OUTPUT.put_line(l_emps(4).name);
 14* END;
SQL> /
David

PL/SQL procedure successfully completed.

Så ta en titt på källorna till alla dessa PL/SQL-procedurer, problemet ligger i dem.