Tsearch2 ranking

ts_query now is 'foo&bar&baz'

Sorry, typo.

On 13.03.2006 12:38, Hannes Dorbath wrote:

ts_query now is 'foo&baz&baz', so both matched.

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Regards,
Hannes Dorbath

On Mon, 13 Mar 2006, Hannes Dorbath wrote:

2 rows of tsvector:

'bar':2 'baz':3 'foo':1
'bar':2 'baz':1 'foo':3

so source text was:

foo bar baz
baz bar foo

ts_query now is 'foo&baz&baz', so both matched.

How can I honor the correct order of the first row and rank it higher? The
position information is there, why doesn't rank() / rank_cd() not use it?

There is a hint to do this. See "Phrase search" in
http://www.sai.msu.su/~megera/oddmuse/index.cgi/Tsearch_V2_Notes

Is there any way to make a difference between those to rows? Any? Even if
it's a bad hack? I really need it :/

Thanks in advance

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83

Order of terms in ts_query hasn't any meaning in current implementation. But you
can use your own ranking function.

Hannes Dorbath wrote:

2 rows of tsvector:

'bar':2 'baz':3 'foo':1
'bar':2 'baz':1 'foo':3

so source text was:

foo bar baz
baz bar foo

ts_query now is 'foo&baz&baz', so both matched.

How can I honor the correct order of the first row and rank it higher?
The position information is there, why doesn't rank() / rank_cd() not
use it?

Is there any way to make a difference between those to rows? Any? Even
if it's a bad hack? I really need it :/

Thanks in advance

--
Teodor Sigaev E-mail: teodor@sigaev.ru
WWW: http://www.sigaev.ru/