Re: [HACKERS] Interface of the R-tree in order to work with postgresql
Hi, Jorge, jorge alberto wrote: I'm Jorge from Peru South America, and this is my first post I want to know how can I add a new spatial access method into the postgresql (I'm doing research on spatial access methods( reading a lot of papers and programming a lot too ) but also I want to know how can I add my new data structure( if someday i get it, of course =) ) in the postgresql, I mean where can i find the .h that describes the interface that a spatial access method, like the R-tree, must have in order to work with postgresql. I think that to understand how postgresql works with spatial access methods, like the R-tree, I need to find a .h or .c to begin reading the code, so can you tell me where to start? Besides the hints others posted here, you might want to look at contrib/tsearch2 and PostGIS for examples of how to use GIST. HTH, Markus -- Markus Schaber | Logical TrackingTracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in Europe! www.ffii.org www.nosoftwarepatents.org signature.asc Description: OpenPGP digital signature
[HACKERS] Interface of the R-tree in order to work with postgresql
Hi everybody!I'm Jorge from Peru South America, and this is my first postI want to know how can I add a new spatial access method into the postgresql (I'm doing research on spatial access methods( reading a lot of papers and programming a lot too ) but also I want to know how can I add my new data structure( if someday i get it, of course =) ) in the postgresql, I mean where can i find the .h that describes the interface that a spatial access method, like the R-tree, must have in order to work with postgresql.I think that to understand how postgresql works with spatial access methods, like the R-tree, I need to find a .h or .c to begin reading the code, so can you tell me where to start?I hope you can help meregards Jorge
Re: [HACKERS] Interface of the R-tree in order to work with postgresql
On Mon, Oct 09, 2006 at 09:15:58AM -0500, jorge alberto wrote: Hi everybody! I'm Jorge from Peru South America, and this is my first post I want to know how can I add a new spatial access method into the postgresql (I'm doing research on spatial access methods( reading a lot of papers and programming a lot too ) but also I want to know how can I add my new data structure( if someday i get it, of course =) ) in the postgresql, I mean where can i find the .h that describes the interface that a spatial access method, like the R-tree, must have in order to work with postgresql. I would start by reading the documentation, specifically the part about GiST. Once you have understood the concept and code there, go to reading the rtree code in the backend. That should answer almost all your questions. Have a nice day, -- Martijn van Oosterhout kleptog@svana.org http://svana.org/kleptog/ From each according to his ability. To each according to his ability to litigate. signature.asc Description: Digital signature
Re: [HACKERS] Interface of the R-tree in order to work with postgresql
jorge alberto [EMAIL PROTECTED] writes: where can i find the .h that describes the interface that a spatial access method, like the R-tree, must have in order to work with postgresql. There is no single .h file that will tell you everything you need to know. I'd suggest starting here: http://developer.postgresql.org/pgdocs/postgres/internals.html with particular attention to chapter 48 http://developer.postgresql.org/pgdocs/postgres/indexam.html After that the indexam README files might be educational: src/backend/access/nbtree/README src/backend/access/gin/README src/backend/access/gist/README src/backend/access/hash/README and then start looking at .h files. regards, tom lane ---(end of broadcast)--- TIP 4: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] Interface of the R-tree in order to work with postgresql
On Oct 9, 2006, at 7:21 AM, Martijn van Oosterhout wrote: On Mon, Oct 09, 2006 at 09:15:58AM -0500, jorge alberto wrote: I want to know how can I add a new spatial access method into the postgresql (I'm doing research on spatial access methods( reading a lot of papers and programming a lot too ) but also I want to know how can I add my new data structure( if someday i get it, of course =) ) in the postgresql, I mean where can i find the .h that describes the interface that a spatial access method, like the R-tree, must have in order to work with postgresql. I would start by reading the documentation, specifically the part about GiST. Once you have understood the concept and code there, go to reading the rtree code in the backend. That should answer almost all your questions. Index Access Methods (Ch. 48) for a more general interface may also be useful, since he implies that R-Tree is not the only spatial access method he is interested in. While some spatial access methods, such as R-Tree, are well-suited for a GiST implementation, it is not a particularly appropriate access method (assumption mismatch) for some other interesting spatial index types that a researcher might be interested in implementing. Cheers, J. Andrew Rogers (who is also implementing new spatial indexes...) [EMAIL PROTECTED] ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
