DBMS_SQL.BIND_VARIABLE with nested table and ORA-600

Question

Hello, I'm experimenting a little with pl/sql and I was trying to do some dynamic SQL using DBMS_SQL, but I'm having a problem when binding a variable that is a neste table(got no problems in the same example if I bind with a varchar2 variable).
Here is a reduction of the problem:
DECLARE
     TYPE CENA_TYPE IS TABLE OF VARCHAR2(30);
     CENA CENA_TYPE;
     L_UPDATE_STMT VARCHAR2(2000);
     UPDATE_CURSOR INTEGER:=DBMS_SQL.OPEN_CURSOR;
     RES INTEGER;
BEGIN
     CENA:=CENA_TYPE('HELLO');
     L_UPDATE_STMT:= 'BEGIN '
                         ||'DBMS_OUTPUT.PUT_LINE(:CENA(1));'
                         ||'END;';
     DBMS_SQL.PARSE(UPDATE_CURSOR, L_UPDATE_STMT ,DBMS_SQL.NATIVE);
     DBMS_SQL.BIND_VARIABLE(UPDATE_CURSOR,':CENA',CENA);
     RES:=DBMS_SQL.EXECUTE(UPDATE_CURSOR);
     DBMS_SQL.CLOSE_CURSOR(UPDATE_CURSOR);
END;
/What am I doing wrong??
Thanks

Answer 1

Pedro_gloria wrote:
What am I doing wrong??DBMS_SQL executes in own context. Therefore, even though type CENA_TYPE is declared in calling anonymous block it is not known to anonymous block you execute in DBMS_SQL. Also, you must initialize and extend collection. Use:
SQL> set serveroutput on
SQL> DECLARE
  2   L_UPDATE_STMT VARCHAR2(2000);
  3   UPDATE_CURSOR INTEGER:=DBMS_SQL.OPEN_CURSOR;
  4   RES INTEGER;
  5  BEGIN
  6   L_UPDATE_STMT:= 'DECLARE
  7   TYPE CENA_TYPE IS TABLE OF VARCHAR2(30);
  8   CENA CENA_TYPE := CENA_TYPE();
  9          BEGIN '
10       ||'CENA.extend;'
11       ||'CENA(1) := :1;'
12       ||'DBMS_OUTPUT.PUT_LINE(CENA(1));'
13       ||'END;';
14   DBMS_SQL.PARSE(UPDATE_CURSOR, L_UPDATE_STMT ,DBMS_SQL.NATIVE);
15   DBMS_SQL.BIND_VARIABLE(UPDATE_CURSOR,':1','Hello');
16   RES:=DBMS_SQL.EXECUTE(UPDATE_CURSOR);
17   DBMS_SQL.CLOSE_CURSOR(UPDATE_CURSOR);
18  END;
19  /
Hello
PL/SQL procedure successfully completed.
SQL> SY.