On Fri, 8 Dec 2006, Rajesh Kumar Mallah wrote:

> On 12/8/06, Oleg Bartunov <oleg@sai.msu.su> wrote:
>> You need to read documentation ! rank_cd accepts the same args as rank()
>> function.
>
> Dear Oleg,
>
> Could you please elaborate a bit more if time permits.
> our application is old and it was working fine in 8.1.5. do i need to
> change the sql
> to use a different function ?

from reference manual:

CREATE FUNCTION rank_cd(
[ weights float4[], ] vector TSVECTOR, query TSQUERY, [ normalization int4 ]
) RETURNS float4

postgres=# SELECT name, rank_cd(name_vec,to_tsquery('hello') ) as rank from test where name_vec @@ to_tsquery('hello') ;
name | rank
-------------+------
hello world | 0.1
(1 row)

or

postgres=# SELECT name, rank_cd('{1,1,1,1}',name_vec,to_tsquery('hello') ) as rank from test where name_vec @@ to_tsquery('hello') ;
name | rank
-------------+------
hello world | 1
(1 row)


>
>>
>> Oleg
>> On Fri, 8 Dec 2006, Rajesh Kumar Mallah wrote:
>>
>

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

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