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. +
diff --git a/doc/src/sgml/pgtrgm.sgml b/doc/src/sgml/pgtrgm.sgml
new file mode 100644
index 18f0f3e..30e5355
*** a/doc/src/sgml/pgtrgm.sgml
--- b/doc/src/sgml/pgtrgm.sgml
***************
*** 9,15 ****
<para>
The <filename>pg_trgm</filename> module provides functions and operators
! for determining the similarity of text based on trigram matching, as
well as index operator classes that support fast searching for similar
strings.
</para>
--- 9,16 ----
<para>
The <filename>pg_trgm</filename> module provides functions and operators
! for determining the similarity of <acronym>ASCII</>
! alphanumeric text based on trigram matching, as
well as index operator classes that support fast searching for similar
strings.
</para>