Обсуждение: pattern search
hello, is it possible to make a search for a pattern in PostgreSQL database, using database functions only? Or should I use PHP for that purpose? thank you for any advice, ktt __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com
> -----Original Message----- > From: pgsql-general-owner@postgresql.org > [mailto:pgsql-general-owner@postgresql.org]On Behalf Of ktt > Sent: Thursday, May 23, 2002 11:06 AM > To: pgsql-general@postgresql.org > Subject: [GENERAL] pattern search > > > hello, > > is it possible to make a search > for a pattern in PostgreSQL database, > using database functions only? > Or should I use PHP for that > purpose? PG supports standard SQL LIKE syntax, as well as full regular expression syntax. See the section in the document on string functions and pattern matching for information. - J Joel BURTON | joel@joelburton.com | joelburton.com | aim: wjoelburton Knowledge Management & Technology Consultant
If you mean text pattern matching then it has regex capabilities *~ i believe without checkiong the manual i m not sure. Alternatiely you could also look at the like operater but regex is probably what you want HTH Darren Ferguson On Thu, 23 May 2002, ktt wrote: > hello, > > is it possible to make a search > for a pattern in PostgreSQL database, > using database functions only? > Or should I use PHP for that > purpose? > > thank you for any advice, > > ktt > > > __________________________________________________ > Do You Yahoo!? > LAUNCH - Your Yahoo! Music Experience > http://launch.yahoo.com > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html >
Yes, you can.
What you do is something like this:
$nugget = "smith";
$res = pg_exec($conn,"select * from table where lower(field) like
'%$nugget%'");
print implode(":",pg_fetch_array($res,0,PGSQL_ASSOC));
For large datasets, there are some issues with performance that can be
addressed by indexing or using the included full text index system
included in the postgresql-7.x.x/contrib/fulltextindex directory.
It's far better to do the search in postgresql than to suck all the data
into php and try to sort through it.
On Thu, 23 May 2002, ktt wrote:
> hello,
>
> is it possible to make a search
> for a pattern in PostgreSQL database,
> using database functions only?
> Or should I use PHP for that
> purpose?
You can do it with LIKE; PostgreSQL also supports Regular Expression searches. Check out: http://www.postgresql.org/idocs/index.php?functions-matching.html --- ktt <kestutis98@yahoo.com> wrote: > hello, > > is it possible to make a search > for a pattern in PostgreSQL database, > using database functions only? > Or should I use PHP for that > purpose? > > thank you for any advice, > > ktt > > > __________________________________________________ > Do You Yahoo!? > LAUNCH - Your Yahoo! Music Experience > http://launch.yahoo.com > > ---------------------------(end of > broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com