From: | Kenneth Marshall <ktm(at)rice(dot)edu> |
---|---|
To: | sandeep prakash dhumale <sandy9940(at)rediffmail(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org, pgsql-general(at)postgresql(dot)org |
Subject: | Re: [SQL] Tsearch not searching 'Y' |
Date: | 2010-04-29 13:56:02 |
Message-ID: | 20100429135602.GM1610@aart.is.rice.edu |
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Thread: | |
Lists: | pgsql-general pgsql-sql |
On Thu, Apr 29, 2010 at 01:13:40PM -0000, sandeep prakash dhumale wrote:
> Hello All,
>
> I am trying to get tsearch working for my application but I am facing a
> problem when alphabet 'Y' is the in the tsquery.
>
> can anyone please share some light on it.
>
>
> # SELECT 'hollywood'::tsvector @@ to_tsquery('holly:*');
> ?column?
> ----------
> f
> (1 row)
>
> SELECT 'hollywood'::tsvector @@ to_tsquery('holl:*');
> ?column?
> ----------
> t
> (1 row)
>
>
> It works when i put <> in y as below but i don't want to do it that way.
>
> SELECT 'hollywood'::tsvector @@ to_tsquery('holl<y>:*');
> ?column?
> ----------
> t
>
> Thanks in advance
That is because the to_tsquery() normalizes the tokens. Here is
what I get from the default configuration:
db=# select to_tsquery('holly:*');
to_tsquery
------------
'holli':*
(1 row)
db=# select to_tsquery('holl:*');
to_tsquery
------------
'holl':*
(1 row)
It is pretty easy to see why you see the behavior that you do.
Maybe you need to change your tsearch configuration to match what
you expect to happen.
Regards,
Ken
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