Re: Phrase search distance syntax

> Sorry to be asking another phrase search syntax question, and so close
> to final release, but ...
Really close...
>
> Why does the phrase distance operator assume <1> means adjacent words,
> and not <0>. (FYI, <-> is the same as <1>.)
Because
1 it is a result of subtruction of word's positions
2 <0> could be used as special case like a word with two infinitives:
# create text search dictionary xx (template = 'ispell',
DictFile='ispell_sample', AffFile='ispell_sample');
# alter text search configuration english ALTER MAPPING FOR asciiword WITH xx,
english_stem;

# select to_tsvector('english', 'bookings');
to_tsvector
----------------------
'book':1 'booking':1

# select to_tsvector('english', 'bookings') @@ 'book <0> booking';
?column?
----------
t
(1 row)

--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/