Re: tsearch2 column update produces "word too long"error

Hi!

Now I really couldn't code C to save my life, but I managed to elicit
some more debugging info. It's still dumb-user-interaction as suspected,
but this is an issue I have to take into account as a basis; here's the
"patch" for ts_cfg.c:

if (lenlemm >= MAXSTRLEN)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
! errmsg("word is too long(%d):
%s",lenlemm,lemm)));

Now when I try

UPDATE ct_com_board_message
SET ftindex=to_tsvector('default',coalesce(user_login,'') ||'
'|| coalesce(title,'') ||' '|| coalesce(text,''));

I eventually get:

ERROR: word is too long(2724):
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajjajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajjajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajjajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajjajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajjajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajjajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajjajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajjajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajjajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajjajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaja
jajajajajajajajajajajajajajajajajajajajajajajajajjajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj
ajajajajajajajajajajajajajajajajajajajajajajajajajajajajajaj

This is a brightly shining example of utterly wanton user-stupidity, I
think: A 2k+ string of |:ja:|. Input like that cannot be helped, though
- if he'd been a bit more imaginative, he could have used a few dozen
"Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch" in a row or
anything else; unfortunately there's no app that could automatically
whack a user if he's doing something stupid.

But on the other hand I cannot think of any reason why crap like that
should be indexed in the first place. Therefore I would like to see some
sort of option allowing me to still use tsearch2 but actually
automatically excluding anything exceeding MAXSTRLEN - so the UPDATE
might throw a NOTICE (if anything at all) but still get on with the
rest.

An alteration like that does however exceed my limited abilities with C
by far and I don't want to mess with something I do not fully understand
and then use that mess in a production environment. Is there a way to
get around this problem with oversized words?

Kind regards

Markus

> -----Ursprüngliche Nachricht-----
> Von: Oleg Bartunov [mailto:oleg(at)sai(dot)msu(dot)su]
> Gesendet: Freitag, 21. November 2003 15:13
> An: Markus Wollny
> Cc: pgsql-general(at)postgresql(dot)org
> Betreff: Re: AW: [GENERAL] tsearch2 column update produces "word too
> long"error
>
>
> On Fri, 21 Nov 2003, Markus Wollny wrote:
>
> > Hello!
> >
> > > Von: Oleg Bartunov [mailto:oleg(at)sai(dot)msu(dot)su]
> > > Gesendet: Freitag, 21. November 2003 13:06
> > > An: Markus Wollny
> > > Cc: pgsql-general(at)postgresql(dot)org
> > >
> > > Word length is limited by 2K. What's exactly the word
> > > tsearch2 complained on ?
> > > 'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch'
> > > is fine :)
> >
> > This was a silly example, I know - it is a long word, but
> not too long
> > to worry a machine. The offending word will surely be much
> longer, but
> > as a matter of fact, I cannot think of any user actually
> typing a 2k+
> > string without any spaces in between. I'm not sure on which word
> > tsearch2 complained, it doesn't tell and even logging did
> not provide me
> > with any more detail:
> >
> > 2003-11-21 14:06:44 [26497] ERROR: 42601: word is too long
> > LOCATION: parsetext_v2, ts_cfg.c:294
> > STATEMENT: UPDATE ct_com_board_message
> > SET
> > ftindex=to_tsvector('default',coalesce(user_login,'') ||' '||
> > coalesce(title,'') ||' '|| coalesce(text,''));
> >
> > Is there some way to find the exact position?
>
> I'm afraid you need to hack ts_cfg.c:294 yourself to print the word
> which's bugging you :)
>
> >
> > > btw, don't forget to configure properly dictionaries, so you
> > > don't have a lot of unique words.
> >
> > I won't forget that; I justed wanted to run a quick-off first test
> > before diving deeper into Ispell and other issues which are
> as yet a bit
> > of a mystery to me.
> >
> > Kind Regards
> >
> > Markus
> >
>
> Regards,
> Oleg
> _____________________________________________________________
> Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
> Sternberg Astronomical Institute, Moscow University (Russia)
> Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
> phone: +007(095)939-16-83, +007(095)939-23-83
>