[HACKERS] user-defined tree methods in GIST
I need some help in building new index structure using GIST. I have to include a procedure for restructuring the tree immediately after i have created the index using gist. How do i do it? Actually I am trying to implement the slim-tree index using gist. To increase the performance, a slim-down algorithm runs after creation of the slim-tree. Where can i give a call to this slim-down procedure after the tree has been built using gist? Regards Sharat.
Re: [HACKERS] user-defined tree methods in GIST
On Tue, Mar 06, 2007 at 01:50:34PM +0530, sharath kumar wrote: I need some help in building new index structure using GIST. I have to include a procedure for restructuring the tree immediately after i have created the index using gist. How do i do it? Actually I am trying to implement the slim-tree index using gist. To increase the performance, a slim-down algorithm runs after creation of the slim-tree. Where can i give a call to this slim-down procedure after the tree has been built using gist? I don't quite understand what a slim-tree index is, but by my reading it's an algorithm to make picksplit work better. I don't think you need to touch the index machinery at all. Also, I don't think it's a good plan to try and manipulate the index wholesale after it's built. Once it's built, queries are going want to use it and any changes are are going to need to be WAL logged and made crash safe which seems quite a lot of work for something you can probably do during picksplit. 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] user-defined tree methods in GIST
I need some help in building new index structure using GIST. I have to include a procedure for restructuring the tree immediately after i have created the index using gist. How do i do it? IMHO, you don't have a chance to do it without patching postgres or developing your own low-level function. Try to play with SP-GiST (http://www.cs.purdue.edu/spgist/). SP-GiST is a modification of GiST for Space Partitioning Trees. But they patch will not work with 8.2 and up because of lack of concurrency. 8.2 doesn't support indexes without concurrency. -- Teodor Sigaev E-mail: [EMAIL PROTECTED] WWW: http://www.sigaev.ru/ ---(end of broadcast)--- TIP 4: Have you searched our list archives? http://archives.postgresql.org
