text: create table db_type_test_source (
      int_val integer,
      char_val varchar2(16),
      clob_val clob,
      blob_val blob,
      date_val date,
      num_val number(22,4),
      constraint db_type_test_source_pk primary key (int_val));
      
  create table db_type_test_target (
      int_val integer,
      char_val varchar2(16),
      clob_val clob,
      blob_val blob,
      date_val date,
      num_val number(22,4),
      constraint db_type_test_target_pk primary key (int_val));
  