Обсуждение: GiST and full text search
Hi all. I have been doing a little research on how to do full text search under postgresql, and GiST seems to be the way to go. But the documentation on this is pretty lacking and I wonder if there are better sources that describe the details on how to implement full text search with GiST. Thanks Wei
On Monday 22 September 2003 16:02, Wei Weng wrote: > Hi all. > > I have been doing a little research on how to do full text search under > postgresql, and GiST seems to be the way to go. But the documentation on > this is pretty lacking and I wonder if there are better sources that > describe the details on how to implement full text search with GiST. Have you looked at tsearch / tsearch2 in the contrib/ directory? -- Richard Huxton Archonet Ltd
The production server uses PostgreSQL 7.3.1 right now, so I am only looking at contrib/tsearch. I read through the README file. It only seems to offer a way to FTS through one 'text' column in the table. How do I create a 'txtidx' column that combines two or even more 'text' columns in the table? Thanks Wei On Mon, 22 Sep 2003, Richard Huxton wrote: > On Monday 22 September 2003 16:02, Wei Weng wrote: > > Hi all. > > > > I have been doing a little research on how to do full text search under > > postgresql, and GiST seems to be the way to go. But the documentation on > > this is pretty lacking and I wonder if there are better sources that > > describe the details on how to implement full text search with GiST. > > Have you looked at tsearch / tsearch2 in the contrib/ directory? > >
On Monday 22 September 2003 16:41, Wei Weng wrote: > The production server uses PostgreSQL 7.3.1 right now, so I am only > looking at contrib/tsearch. > > I read through the README file. It only seems to offer a way to FTS > through one 'text' column in the table. How do I create a 'txtidx' column > that combines two or even more 'text' columns in the table? According to README.tsearch from 7.4beta (not tsearch2 which is the new one) Current syntax allows creating trigger for several columns you want to be searchable: create trigger txtidxupdate before update or insert on titles for each row execute procedure tsearch(titleidx, title1, title2,...); Perhaps see what 7.3.4's tsearch says - that should be compatible with 7.3.1 -- Richard Huxton Archonet Ltd
On Monday 22 September 2003 09:41, Wei Weng wrote: > The production server uses PostgreSQL 7.3.1 right now, so I am only > looking at contrib/tsearch. > tsearch2 is compatible, and available for any version of PosgreSQL 7.3. It is not included in the contrib directory. It is available in CVS head and will be in 7.4 contrib AFAIK. You can download the stable version here: http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/tsearch-v2-stable.tar.gz There are full installation instructions in the introdution. See below. > I read through the README file. It only seems to offer a way to FTS > through one 'text' column in the table. How do I create a 'txtidx' column > that combines two or even more 'text' columns in the table? > Read the introduction documentation. It explains this in detail, plus many other things you might want to know: http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch-V2-intro.html Andy
On Mon, 22 Sep 2003, Wei Weng wrote: > The production server uses PostgreSQL 7.3.1 right now, so I am only > looking at contrib/tsearch. you may download tsearch2 for 7.3.X from http://www.sai.msu.su/~megera/postgres/gist/tsearc/V2 > > I read through the README file. It only seems to offer a way to FTS > through one 'text' column in the table. How do I create a 'txtidx' column > that combines two or even more 'text' columns in the table? > > Thanks > > Wei > > On Mon, 22 Sep 2003, Richard Huxton wrote: > > > On Monday 22 September 2003 16:02, Wei Weng wrote: > > > Hi all. > > > > > > I have been doing a little research on how to do full text search under > > > postgresql, and GiST seems to be the way to go. But the documentation on > > > this is pretty lacking and I wonder if there are better sources that > > > describe the details on how to implement full text search with GiST. > > > > Have you looked at tsearch / tsearch2 in the contrib/ directory? > > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 7: don't forget to increase your free space map settings > Regards, Oleg _____________________________________________________________ Oleg Bartunov, sci.researcher, hostmaster of AstroNet, Sternberg Astronomical Institute, Moscow University (Russia) Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/ phone: +007(095)939-16-83, +007(095)939-23-83