| From: | "Mitch Vincent" <mitch(at)venux(dot)net> | 
|---|---|
| To: | "Culley Harrelson" <culleyharrelson(at)yahoo(dot)com>, <pgsql-general(at)postgresql(dot)org> | 
| Subject: | Re: full text searching | 
| Date: | 2001-02-05 16:28:45 | 
| Message-ID: | 00aa01c08f90$b5ca4ad0$0200000a@windows | 
| Views: | Whole Thread | Raw Message | Download mbox | Resend email | 
| Thread: | |
| Lists: | pgsql-general pgsql-hackers | 
> Hi,
>
> OK full text searching.  Will the full text index
> catch changes in verb tense?  i.e. will a search for
> woman catch women?
>
> I'm researching before I dive in to this later in the
> week so please excuse this incompletely informed
> question:  Will I need to rebuild postgresql with the
> full-text index module included?  Unfortunately I'm
> away from my linux machine-- would someone be willing
> to email me the README?
Regardless of indexing, you're still searching for a specific string (if you
search using the = operator).
SELECT * from people WHERE whatever = 'woman';
-- Isn't going to catch anything but the literal string "woman".. (it's case
sensitive too, mind you)
SELECT * from people WHERE whatever LIKE 'wom%n';
-- Should check either.
A regex search is going to get more specific but when using the regex
search, you can't use indexes.
Anyone, please correct me if I'm wrong.
-Mitch
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Mitch Vincent | 2001-02-05 16:32:55 | Re: full text searching | 
| Previous Message | Richard Huxton | 2001-02-05 16:10:25 | Re: ODBC driver for 7.1 | 
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Mathieu Dube | 2001-02-05 16:31:37 | Re: 1024 limits?? | 
| Previous Message | Mathieu Dube | 2001-02-05 16:20:47 | Re: 1024 limits?? |