Define local exceptioon variable. : RAISE « PL SQL Statements « Oracle PL/SQL Tutorial

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2. PL SQL Statements
3. RAISE

SQL>
SQL> SET SERVEROUTPUT ON SIZE 1000000
SQL>
SQL> -- Build an anonymous block that will trigger an error.
SQL> DECLARE
  2
  3
  4    my_error          EXCEPTION;
  5    PRAGMA EXCEPTION_INIT(my_error,-20001);
  6
  7  BEGIN
  8
  9    -- Raise the exception.
 10    RAISE my_error;
 11
 12  EXCEPTION
 13
 14    WHEN my_error THEN
 15      dbms_output.put_line('RAISE my_error'||CHR(10)
 16                           ||'SQLCODE ['||SQLCODE||']'||CHR(10)
 17                           ||'SQLERRM ['||SQLERRM
 18                           ||'User defined error.]');
 19
 20  END;
 21  /
RAISE my_error
SQLCODE [-20001]
SQLERRM [ORA-20001: User defined error.]

PL/SQL procedure successfully completed.

SQL>