PL / SQL Bubble排序程序错误

Question

I am writing a PL/SQL bubble sorting program but it is giving a:

Error "ORA-06532: Subscript outside of limit"

error. Kindly help me to resolve it as I am new to PL/SQL, the code is:

DECLARE
      temp int;
      type first is VARRAY(6) of integer;
      arr first;
      i integer;
      j integer;
BEGIN
      i:=0;
      j:=1;
      temp:=0;
      arr:=first(3,1,4,2,5,9);
      FOR i in 0..4 LOOP
          FOR j in 1..5 LOOP
             if arr(i)>arr(j) then
                temp:=arr(i);
                arr(i):=arr(j);
                arr(j):=temp;
             end if;
          END LOOP;
      END LOOP;
     FOR i in 0..5 LOOP
          dbms_output.put_line(arr(i));
     END LOOP;

END

Answer 1

PL/SQL arrays are one-based rather than zero-based.

Hence the indexes you need to use are 1..6 rather than 0..5.

That should solve your immediate problem. Whether your algorithm will work may be another matter, it looks like a hybrid between bubble and selection sorts - the former tends to only compare adjacent elements.

But fixing the array index out of bounds issue is your first step.