prefix search in tsearch - Mailing list pgsql-docs

From Erik Rijkers
Subject prefix search in tsearch
Date
Msg-id ac8b2e9843ba8af2c032635f73a854a9.squirrel@webmail.xs4all.nl
Whole thread Raw
Responses Re: prefix search in tsearch
List pgsql-docs
[docs from cvs HEAD]

I found the text-search documentation a little unclear about 'prefix search'; specifically, the
examples do not show that the so-called 'prefix' is first stemmed, before it is used as prefix.

For instance, the following can be a little surprising:

SELECT to_tsvector( 'postgraduate' ) @@ to_tsquery( 'postgres:*' );
 ?column?
----------
 t
(1 row)

Because prefix search is such an important functionality I think this should be better explained,
which I hope the attached doc-patch does.

(In textsearch.sgml is another mention + example of prefix search, perhaps it should be extended a
little there too - which I'm happy to do as well, but I first wanted to see if you agree that it
is a little too obscure as it stands)


Erik Rijkers

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