[HACKERS] external indices ...
I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? And, if so, what is a *good* doc for me to point them at to get up to speed with it? Is what we have in the docs the best place, or is there something someone else has written that gets into it even more? Thanks ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] external indices ...
I haven't worked with GiST, although I have been curious from time to time. Just never had the time to sit, read, and try out the GiST system. On my text search system (FTSS) I use functions that return sets of data. It make be easier to implement that than a GiST. Basically, I create a unique ID index on a table of data. Create my external index. When a search is done, I return a set of unique IDs and ranks. I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? And, if so, what is a *good* doc for me to point them at to get up to speed with it? Is what we have in the docs the best place, or is there something someone else has written that gets into it even more? Thanks ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] external indices ...
Marc, On Tue, 8 Feb 2005, Marc G. Fournier wrote: I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? And, if so, what is a *good* doc for me to point them at to get up to speed with it? Is what we have in the docs the best place, or is there something someone else has written that gets into it even more? I'm a little bit confused, because I couldn't catch your meaning :) Thanks ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org 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 ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [HACKERS] external indices ...
On Tue, 8 Feb 2005, Oleg Bartunov wrote: Marc, On Tue, 8 Feb 2005, Marc G. Fournier wrote: I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? And, if so, what is a *good* doc for me to point them at to get up to speed with it? Is what we have in the docs the best place, or is there something someone else has written that gets into it even more? I'm a little bit confused, because I couldn't catch your meaning :) tsearch2 is an external indexing method, no? external in that it isn't intergrated as part of PostgreSQL, but is added on ... with the 'add on' being through the GiST framework ... right ? Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [HACKERS] external indices ...
Marc G. Fournier [EMAIL PROTECTED] writes: I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? Better ask what he means by external exactly. I think I've heard some people use the phrase external index to mean any index that's not actually part of the table itself; which makes all our index types external. (As a counterexample, imagine a table that is itself organized as a btree.) regards, tom lane ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
Re: [HACKERS] external indices ...
Summary: Currently used with Oracle databases thru their Extensible Indexing Cartridge. What we are interested in is finding out whether or not we can use our technology directly with PostgreSQL. That would involve, from a overly simplistic view, allowing Postgres to use external indexes. Does that help any? On Tue, 8 Feb 2005, Tom Lane wrote: Marc G. Fournier [EMAIL PROTECTED] writes: I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? Better ask what he means by external exactly. I think I've heard some people use the phrase external index to mean any index that's not actually part of the table itself; which makes all our index types external. (As a counterexample, imagine a table that is itself organized as a btree.) regards, tom lane Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] external indices ...
On Tue, 8 Feb 2005, Marc G. Fournier wrote: On Tue, 8 Feb 2005, Oleg Bartunov wrote: Marc, On Tue, 8 Feb 2005, Marc G. Fournier wrote: I believe that this is what Oleg et al tap into with the tsearch2 stuff, no? I have someone asking me about it, and want to make sure that I'm telling him the right answer ... is this what GiST is? And, if so, what is a *good* doc for me to point them at to get up to speed with it? Is what we have in the docs the best place, or is there something someone else has written that gets into it even more? I'm a little bit confused, because I couldn't catch your meaning :) tsearch2 is an external indexing method, no? external in that it isn't intergrated as part of PostgreSQL, but is added on ... with the 'add on' being through the GiST framework ... right ? I think, that guy asked about if tsearch2 is an external program which running as a separate process. Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster 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 ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [HACKERS] external indices ...
Marc G. Fournier [EMAIL PROTECTED] writes: Currently used with Oracle databases thru their Extensible Indexing Cartridge. What we are interested in is finding out whether or not we can use our technology directly with PostgreSQL. That would involve, from a overly simplistic view, allowing Postgres to use external indexes. Does that help any? Well, I spent a little time googling on this, and dug through Oracle documents that seem to have been written by marketroids who think componentize is a verb :-( ... but by the time my brain went numb, I hadn't actually seen anything that hasn't been in Postgres for years. What you need to make clear to them is that their existing code base isn't likely to be worth a dime --- if they don't mind recoding, the functionality is probably all there, but there will not be any compatibility of details. There are no standards covering this stuff. regards, tom lane ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
