Creating or simulating two dimensional arrays in PL/SQL

Question

Can you please help me how can I create two dimensional array in PL/SQL for Stored Procedure? The columns are dynamic so it can grow and change in types also. Any help is ap

Answer 1

VARRAY and nested table user-defined datatypes always have to be initialized using a constructor. You're doing that correctly for the nested table, but not for the VARRAYs that it contains. The simplest fix is to call the constructor in the assignment lines:

declare
    Type CAR_TABLE_ARRAY is varray(2) of varchar2(255);
    TYPE CAR_TABLE_TYPE IS TABLE OF CAR_TABLE_ARRAY;
    CAR_TABLE CAR_TABLE_TYPE;
begin    
    CAR_TABLE := CAR_TABLE_TYPE();
    CAR_TABLE.EXTEND(10);
    CAR_TABLE(1) := CAR_TABLE_ARRAY('DODGE',null);
    CAR_TABLE(2) := CAR_TABLE_ARRAY('FORD',null);
    CAR_TABLE(3) := CAR_TABLE_ARRAY('MUSTANG',null);
    CAR_TABLE(4) := CAR_TABLE_ARRAY('EDSEL',null);
    CAR_TABLE(5) := CAR_TABLE_ARRAY('STUDEBAKER',null);

    DBMS_OUTPUT.put_line( '1 ' || CAR_TABLE(1)(1) );
    DBMS_OUTPUT.put_line( '2 ' || CAR_TABLE(2)(1) );
    DBMS_OUTPUT.put_line( '3 ' || CAR_TABLE(3)(1) );
    DBMS_OUTPUT.put_line( '4 ' || CAR_TABLE(4)(1) );
    DBMS_OUTPUT.put_line( '5 ' || CAR_TABLE(5)(1) );
end;