-- https://docs.oracle.com/en/database/oracle/oracle-database/23/lnpls/plsql-subprograms.html
CREATE OR REPLACE PACKAGE pkg2 AUTHID DEFINER IS
  SUBTYPE t1 IS VARCHAR2(10);
  SUBTYPE t2 IS VARCHAR2(10);
  PROCEDURE s (p t1);
  PROCEDURE s (p t2);
END pkg2;
/