Thread

Re: KEEPONLYALNUM for pg_trgm is not documented

Bruce Momjian <bruce@momjian.us> — 2011-09-05T17:25:40Z

Robert Haas wrote:
> On Fri, Mar 11, 2011 at 3:59 AM, Fujii Masao <masao.fujii@gmail.com> wrote:
> > On Fri, Mar 11, 2011 at 5:52 PM, Itagaki Takahiro
> > <itagaki.takahiro@gmail.com> wrote:
> >> contrib/pg_trgm in 9.1 becomes more attractive feature by index supports
> >> for LIKE operators, but only alphabet and numeric characters are indexed
> >> by default. But, we can modify KEEPONLYALNUM in the source code to
> >> keep all characters in n-gram words.
> >>
> >> However, the limitation and KEEPONLYALNUM are not documented in the page:
> >> ?http://developer.postgresql.org/pgdocs/postgres/pgtrgm.html
> >>
> >> An additonal documentation patches acceptable? The issues would be a FAQ for
> >> non-English users. I heard that pg_trgm will be one of the *killer features*
> >> of 9.1 in Japan, where N-gram based text search is preferred.
> >
> > +10
> 
> It's certainly not too late for doc patches.

I have applied the attached documention patch to 9.0, 9.1, and current
to mention that only ascii alphanumeric characters are processed by
contrib/pg_trgm.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +