Re: tsearch2 problem rank_cd() (possibly) crashing postgres

On 12/8/06, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> wrote:
> On Fri, 8 Dec 2006, Rajesh Kumar Mallah wrote:
>
> > On 12/8/06, Oleg Bartunov <oleg(at)sai(dot)msu(dot)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(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
> phone: +007(495)939-16-83, +007(495)939-23-83
>