Обсуждение: New geographic types....
As part of the Fmaps project (Fmaps.sourceforge.net), Eric Miller is developing some new geographic types for Postgres. We have several questions relating to the implementation of new types, variable types, and especially how to index them. For the moment we are developing the new types/functions as extensions, should it stays that way or what does it imply to be merged in the main distribution. We will be glad if someone can point us to some documentation on the subject, as the developer doc that comes with PG is very short on the subject. For Fmaps to be complete, we will need a toasted version of PG where the 8kB limit has been removed, and works with custom types. Can someone give a status on toasted PG (working, not working, stable enough, unstable,...) Cheers... Franck Martin Network and Database Development Officer SOPAC South Pacific Applied Geoscience Commission Fiji E-mail: franck@sopac.org.fj <mailto:franck@sopac.org.fj> Web site: www.sopac.org.fj <http://www.sopac.org.fj>
Franck Martin <Franck@sopac.org.fj> writes:
> As part of the Fmaps project (Fmaps.sourceforge.net), Eric Miller is
> developing some new geographic types for Postgres.
Cool!
> We have several questions relating to the implementation of new types,
> variable types, and especially how to index them.
Datatype questions in general we can deal with. Are you planning to use
r-tree indices, or perhaps something even more esoteric? You might be a
little bit on your own there; I don't think any of the currently active
developers know much about the r-tree code.
> For the moment we are developing the new types/functions
> as extensions, should it stays that way or what does it imply to be merged
> in the main distribution.
If you are willing to release your code under the Postgres license terms
(basically BSD) then I think we'd be interested in including these types
in the distribution --- certainly in the contrib area, maybe integrated
into the standard build if there seems to be enough interest in 'em.
> We will be glad if someone can point us to some documentation on the
> subject, as the developer doc that comes with PG is very short on the
> subject.
The docs are kind of weak; there's little substitute for looking at
existing code you can use as a model. Asking questions on the lists
is good too.
> For Fmaps to be complete, we will need a toasted version of PG where the 8kB
> limit has been removed, and works with custom types. Can someone give a
> status on toasted PG (working, not working, stable enough, unstable,...)
This should happen for 7.1 which we are hoping to have out circa Aug-Sep.
Jan Wieck would have to be the one to give you any more-detailed
projection than that. It's certainly not there yet in any usable form.
regards, tom lane
Toast will be in 7.1, scheduled for August. [ Charset ISO-8859-1 unsupported, converting... ] > As part of the Fmaps project (Fmaps.sourceforge.net), Eric Miller is > developing some new geographic types for Postgres. We have several questions > relating to the implementation of new types, variable types, and especially > how to index them. For the moment we are developing the new types/functions > as extensions, should it stays that way or what does it imply to be merged > in the main distribution. > > We will be glad if someone can point us to some documentation on the > subject, as the developer doc that comes with PG is very short on the > subject. > > For Fmaps to be complete, we will need a toasted version of PG where the 8kB > limit has been removed, and works with custom types. Can someone give a > status on toasted PG (working, not working, stable enough, unstable,...) > > Cheers... > > > Franck Martin > Network and Database Development Officer > SOPAC South Pacific Applied Geoscience Commission > Fiji > E-mail: franck@sopac.org.fj <mailto:franck@sopac.org.fj> > Web site: www.sopac.org.fj <http://www.sopac.org.fj> > > -- Bruce Momjian | http://www.op.net/~candle pgman@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