On 12/8/06, Oleg Bartunov <oleg@sai.msu.su> wrote:
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
Dear Oleg,
thanks for the prompt help. looks like we have to modify
our application code.
i would like to point out :
In our Production Database
\df public.rank_cd
+--------+---------+------------------+-------------------------------------+
| Schema | Name | Result data type | Argument data types |
+--------+---------+------------------+-------------------------------------+
| public | rank_cd | real | integer, tsvector, tsquery |
| public | rank_cd | real | integer, tsvector, tsquery, integer |
| public | rank_cd | real | tsvector, tsquery |
| public | rank_cd | real | tsvector, tsquery, integer |
+--------+---------+------------------+-------------------------------------+
(4 rows)
In tsearch2.sql (with pgsql 8.2.0)
$ grep "CREATE FUNCTION rank_cd" tsearch2.sql
CREATE FUNCTION rank_cd(float4[], tsvector, tsquery)
CREATE FUNCTION rank_cd(float4[], tsvector, tsquery, int4)
CREATE FUNCTION rank_cd(tsvector, tsquery)
CREATE FUNCTION rank_cd(tsvector, tsquery, int4)
This means first arguments have changed from integer to float4[]
This means all the application code needs to be changed now :-/
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)
BTW: above did not work for me
i had to explicitly cast '{1,1,1,1}' to '{1,1,1,1}'::float4[] ,
is anything fishy with my database ?
SELECT name, rank_cd('{1,1,1,1}'::float4[]
,name_vec,to_tsquery('hello') ) as rank from test where name_vec
@@ to_tsquery('hello') ;
( PS: thanks for the nice tsearch software we have been using it since
"pre tsearch" era. (openfts) )
Regds
Mallah.
>
>>
>> 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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