Thread
-
Keyed Tables
Glen and Rosanne Eustace <agree@godzone.net.nz> — 1999-05-23T05:04:50Z
I thought I had already posted this query but now I can't remember. If I have please excuse the repeat. But as I can't remember the answer either can someone please comment. Is there likely to be any attempt to allow a table to be keyed. It seems that by default a table is created as a heap and in order to improve access speed, one must create indices on that table. I use Ingres at work and quite like the ability to do a 'modify table to btree' type of command. When the table concerned is basically only a key plus value, it seems rather inefficient to have to have both the heap and then an index when supposedly one could simply make the table into a btree in the first place. -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Glen Eustace, on behalf of GodZone Internet Services, a division of AGRE Enterprises Limited. 176 Te Awe Awe St, Palmerston North, New Zealand Ph: +64 6 356 2562, Fax: +64 6 357 0271, Mobile: 025 416 184, http://WWW.GodZone.Net.NZ
-
Re: [GENERAL] Keyed Tables
Bruce Momjian <maillist@candle.pha.pa.us> — 1999-05-23T06:32:45Z
[Charset iso-8859-1 unsupported, filtering to ASCII...] > I thought I had already posted this query but now I can't remember. If > I have please excuse the repeat. But as I can't remember the answer > either can someone please comment. > > Is there likely to be any attempt to allow a table to be keyed. It > seems that by default a table is created as a heap and in order to > improve access speed, one must create indices on that table. > > I use Ingres at work and quite like the ability to do a 'modify table to > btree' type of command. When the table concerned is basically only a > key plus value, it seems rather inefficient to have to have both the > heap and then an index when supposedly one could simply make the table > into a btree in the first place. Yes, it is a nice feature, but we don't support it. We do have CLUSTER, but that is not as nice. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
-
RE: [GENERAL] Keyed Tables
Glen and Rosanne Eustace <agree@godzone.net.nz> — 1999-05-23T19:30:27Z
> Yes, it is a nice feature, but we don't support it. We do > have CLUSTER, but that is not as nice. Any chance of adding it to the list of possible enhancements ?
-
Re: [GENERAL] Keyed Tables
Bruce Momjian <maillist@candle.pha.pa.us> — 1999-05-23T21:03:05Z
[Charset iso-8859-1 unsupported, filtering to ASCII...] > > Yes, it is a nice feature, but we don't support it. We do > > have CLUSTER, but that is not as nice. > > Any chance of adding it to the list of possible enhancements ? Not sure it is do-able for us. It would require so much work, that I hesitate to add it. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
-
Full Text Searches
Andy Lewis <alewis@themecca.net> — 1999-05-24T00:21:08Z
Whats the possibility of having full text searches added to text fields? That would be awesome..... Andy
-
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-24T02:26:08Z
On Sun, 23 May 1999, Andy Lewis wrote: > Whats the possibility of having full text searches added to text fields? > > That would be awesome..... Unfortunately, full text indexing is a different issue than the kind of indexing performed on table columns, and if you want to do any kind of efficient full text searching, you have to index the individual words in the text or it'd be so slow as to be hardly useful (especially if you're talking about 600,000 records with 2K of text in each text field). Excalibur, for instance, creates its own internal indexing for full text records, but uses an underlying SQL database for regular fielded data, and when you design your database, you have to make the distinction about what kind of indexing you want, stop words (words you don't want indexed, like 'the' and 'of'), and the way certain fields can or will be searched. Brett W. McCoy http://www.lan2wan.com/~bmccoy/ ----------------------------------------------------------------------- The six great gifts of an Irish girl are beauty, soft voice, sweet speech, wisdom, needlework, and chastity. -- Theodore Roosevelt, 1907 -
Re: [GENERAL] Full Text Searches
Bruce Momjian <maillist@candle.pha.pa.us> — 1999-05-24T03:30:53Z
We have a fulltext stuff in the contrib directory. > On Sun, 23 May 1999, Andy Lewis wrote: > > > Whats the possibility of having full text searches added to text fields? > > > > That would be awesome..... > > Unfortunately, full text indexing is a different issue than the kind of > indexing performed on table columns, and if you want to do any kind of > efficient full text searching, you have to index the individual words in > the text or it'd be so slow as to be hardly useful (especially if you're > talking about 600,000 records with 2K of text in each text field). > > Excalibur, for instance, creates its own internal indexing for full text > records, but uses an underlying SQL database for regular fielded data, and > when you design your database, you have to make the distinction about what > kind of indexing you want, stop words (words you don't want indexed, like > 'the' and 'of'), and the way certain fields can or will be searched. > > Brett W. McCoy > http://www.lan2wan.com/~bmccoy/ > ----------------------------------------------------------------------- > The six great gifts of an Irish girl are beauty, soft voice, sweet speech, > wisdom, needlework, and chastity. > -- Theodore Roosevelt, 1907 > > > > -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
-
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-24T11:01:36Z
On Sun, 23 May 1999, Bruce Momjian wrote: > We have a fulltext stuff in the contrib directory. What's it called? I only see some tcl frontend stuff. Despite my pessimism form the prior message, I am interested in a full text retrieval engine. Brett W. McCoy http://www.lan2wan.com/~bmccoy/ ----------------------------------------------------------------------- Lonely is a man without love. -- Englebert Humperdinck -
Re: [GENERAL] Full Text Searches
Andy Lewis <alewis@themecca.net> — 1999-05-24T13:05:22Z
Its not really, really explanitory..... On Mon, 24 May 1999, Brett W. McCoy wrote: > On Sun, 23 May 1999, Bruce Momjian wrote: > > > We have a fulltext stuff in the contrib directory. > > What's it called? I only see some tcl frontend stuff. Despite my > pessimism form the prior message, I am interested in a full text retrieval > engine. > > Brett W. McCoy > http://www.lan2wan.com/~bmccoy/ > ----------------------------------------------------------------------- > Lonely is a man without love. > -- Englebert Humperdinck >
-
Re: [GENERAL] Full Text Searches
Lincoln Spiteri <lincoln.spiteri@st.com> — 1999-05-24T13:16:39Z
He means the contrib directory in the source tree not the one on the ftp site. On Mon, 24 May 1999, bmccoy@lan2wan.com wrote: > On Mon, 24 May 1999, Bruce Momjian wrote: > > > > What's it called? I only see some tcl frontend stuff. Despite my > > > pessimism form the prior message, I am interested in a full text retrieval > > > engine. > > > > It is called contrib/fulltextindex. Does someone want to suggest a > > better name? > > I didn't see it on the ftp site. I only saw pgv and tcldb in the contrib > directory. > > Brett W. McCoy > http://www.lan2wan.com/~bmccoy > ----------------------------------------------------------------------- > Cabbage, n.: > A familiar kitchen-garden vegetable about as large and wise as > a man's head. > -- Ambrose Bierce, "The Devil's Dictionary" -- ------------------------------------------------------------------------------ Lincoln Spiteri Manufacturing Systems STMicroelectronics, Malta e-mail: lincoln.spiteri@st.com ------------------------------------------------------------------------------
-
Re: [GENERAL] Full Text Searches
Bruce Momjian <maillist@candle.pha.pa.us> — 1999-05-24T13:45:27Z
> On Sun, 23 May 1999, Bruce Momjian wrote: > > > We have a fulltext stuff in the contrib directory. > > What's it called? I only see some tcl frontend stuff. Despite my > pessimism form the prior message, I am interested in a full text retrieval > engine. It is called contrib/fulltextindex. Does someone want to suggest a better name? -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
-
Outer joins
Kaare Rasmussen <kar@webline.dk> — 1999-05-24T13:57:13Z
Going through the documentation I can only find little about outer joins. One statement is in the Changes doc about including syntax for outer joins, but there doesn't seem to be implemented any code after that. Is it true that there's no outer joins yet? Any plans? Btw. what is the syntax for outer joins. I know only Oracle's (+) operator.
-
Re: [GENERAL] Full Text Searches
Bruce Momjian <maillist@candle.pha.pa.us> — 1999-05-24T14:32:27Z
> On Mon, 24 May 1999, Bruce Momjian wrote: > > > > What's it called? I only see some tcl frontend stuff. Despite my > > > pessimism form the prior message, I am interested in a full text retrieval > > > engine. > > > > It is called contrib/fulltextindex. Does someone want to suggest a > > better name? > > I didn't see it on the ftp site. I only saw pgv and tcldb in the contrib > directory. Sorry, I meant in the distribution's contrib directory, not the ftp site. I didn't even know we had a contrib directory on the ftp site. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
-
Re: [GENERAL] Full Text Searches
Ross J. Reedstrom <reedstrm@wallace.ece.rice.edu> — 1999-05-24T14:42:53Z
> On Mon, 24 May 1999, Bruce Momjian wrote: > > > > What's it called? I only see some tcl frontend stuff. Despite my > > > pessimism form the prior message, I am interested in a full text retrieval > > > engine. > > > > It is called contrib/fulltextindex. Does someone want to suggest a > > better name? > > I didn't see it on the ftp site. I only saw pgv and tcldb in the contrib > directory. Ah, here's the problem. Bruce means the contrib directory in the source distribution, which is at the top level, right beside src (were the core of postgresql lives). It's pgsql/contrib, if you do a CVS checkout. I'm not sure where it ends up in various binary packages. (/usr/lib/postgresql/contrib on my Debian Linux install, for example, has parts of it,m but not the whole thing) Ross -- Ross J. Reedstrom, Ph.D., <reedstrm@rice.edu> NSBRI Research Scientist/Programmer Computer and Information Technology Institute Rice University, 6100 S. Main St., Houston, TX 77005
-
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-24T17:34:59Z
On Mon, 24 May 1999, Bruce Momjian wrote: > > What's it called? I only see some tcl frontend stuff. Despite my > > pessimism form the prior message, I am interested in a full text retrieval > > engine. > > It is called contrib/fulltextindex. Does someone want to suggest a > better name? I didn't see it on the ftp site. I only saw pgv and tcldb in the contrib directory. Brett W. McCoy http://www.lan2wan.com/~bmccoy ----------------------------------------------------------------------- Cabbage, n.: A familiar kitchen-garden vegetable about as large and wise as a man's head. -- Ambrose Bierce, "The Devil's Dictionary" -
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-24T18:31:36Z
On Mon, 24 May 1999, Bruce Momjian wrote: > Sorry, I meant in the distribution's contrib directory, not the ftp > site. I didn't even know we had a contrib directory on the ftp site. Wel, you do now! Thanks! I'll check it out! Brett W. McCoy http://www.lan2wan.com/~bmccoy ----------------------------------------------------------------------- Once, adv.: Enough. -- Ambrose Bierce, "The Devil's Dictionary" -
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-24T18:39:59Z
Hey, found the module. Looks pretty interesting -- even has the capability of ignoring stopwords. This is just what I am looking for! Brett W. McCoy http://www.lan2wan.com/~bmccoy ----------------------------------------------------------------------- "What's the use of a good quotation if you can't change it?" -- Dr. Who -
Re: [GENERAL] Full Text Searches
Lincoln Spiteri <lincoln.spiteri@st.com> — 1999-05-25T15:57:47Z
Sorry, I got this in my mail this morning, Due to a problem in the European Internet Gateway yesterday (solved this morning by xxxxx ), outgoing internet emails will suffer huge delays. The queue should be fully processed during next european night. Regards Lincoln On Tue, 25 May 1999, bmccoy@lan2wan.com wrote: > On Mon, 24 May 1999, Lincoln Spiteri wrote: > > > He means the contrib directory in the source tree not the one on the ftp site. > > Yeah, we got that cleared up yesterday. > > Brett W. McCoy > http://www.lan2wan.com/~bmccoy > ----------------------------------------------------------------------- > "Now this is a totally brain damaged algorithm. Gag me with a > smurfette." > -- P. Buhr, Computer Science 354 -- ------------------------------------------------------------------------------ Lincoln Spiteri Manufacturing Systems STMicroelectronics, Malta e-mail: lincoln.spiteri@st.com ------------------------------------------------------------------------------ -
Re: [GENERAL] Full Text Searches
Brett W. McCoy <bmccoy@lan2wan.com> — 1999-05-25T19:06:48Z
On Mon, 24 May 1999, Lincoln Spiteri wrote: > He means the contrib directory in the source tree not the one on the ftp site. Yeah, we got that cleared up yesterday. Brett W. McCoy http://www.lan2wan.com/~bmccoy ----------------------------------------------------------------------- "Now this is a totally brain damaged algorithm. Gag me with a smurfette." -- P. Buhr, Computer Science 354