Re: How to implement word wrap

> Really, write a stored procedure that accepts (text, line_length) and
> returns SETOF text. You could even add hyphenation for the appropriate
> language if you go that route. For the latter it's probably best to write
> it in C so you can link hyphenation libraries to your code.
>
> Another approach that may be viable is to use windowing functions, but I'm
> not so sure it's possible to have a window that is being defined by the
> data it's running over (eg. a window defined by the length of an
> accumulated line of text).

Implementations from http://sqlserverpedia.com/wiki/Word_Wrap_a_String
and from http://docstore.mik.ua/orelly/oracle/prog2/ch11_02.htm#AUTOID-10508
paragraph 11.2.2 did not work in Postgres.
I created method below. Is this best code for this ?

Andrus.

CREATE OR REPLACE FUNCTION wordwrap(line text, linelen integer)
RETURNS SETOF text as $$
DECLARE
  words text[] := string_to_array(line,' ');
  i integer;
  res text:='';

BEGIN
  if trim(line)='' then
    return next '';
    return;
    end if;
 for i IN 1 .. array_upper(words,1) LOOP
   if length(res)+length(words[i]) > linelen THEN
     return next res;
     res := '';
     END IF ;
   if res<>'' then
     res := res || ' ';
     end if;
   res := res || words[i];
   end loop;
return next res;
END
 $$ LANGUAGE plpgsql;