text: declare
  v_sql LONG;
  begin
  v_sql:='create table mview_conversion_excludes ( view_name varchar(30) primary key not null )';
  execute immediate v_sql;
  
  EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE = -955 THEN
          NULL; -- suppresses ORA-00955 exception
        ELSE
           RAISE;
        END IF;
  END;