text: create table tab_comment
  ( 	
      col1		number(5),
      comment on table is "tablecomment";
  );
  
  create table tab_col_comment
  ( 	
      col1		number(5),
      comment on column col1 is 'columncomment \'';
  );
  
  create table tab_drop_comment
  ( 	
      col1		number(5),
  );
  
  create table tab_umlaut_comment
  ( 	
      col1		number(5),
      comment on table is "a_umlaut_is_ä";
  );
  
  create table tab_drop_column_comment
  ( 	
      col1		number(5)
  );
  
  create table tab_drop_col_and_comment
  ( 	
      col1		number(5)
  );
  
  create table tab_col_string_comment
  (
      "col1 string"	number(5),
      comment on column "col1 string" is 'columncomment \'';
  );