Re: assorted problems with intarray and other GiST contribs.

On Sun, 26 Jun 2005, PFC wrote:

>
> Hello !
>
> I'm using postgresql 8.0.1-r2 on gentoo linux.
> So, here are the problems :
>
> ************************************
> * int_array_aggregate crashes

I don't remember this function :)

> * ltree
>
> First of all congratulations for this extremely useful datatype and
> assorted indexes, it really rocks and makes SQL tree handling from nightmare
> to fun.
>
> It would be nice to have functions to :
> - know the length of a ltree (ie. number of elements)

int4 nlevel(ltree) - returns level of the node.

> - access it like an array (ie. get element N).

subltree, subpath

> This is to be able to iterate over the elements and fetch each of
> them to get the list of rows which make up a path upto a given object in my
> tree.
>
> Also a function returning the comon prefix between two ltrees would
> be really useful.

ltree lca(ltree,ltree,...) (up to 8 arguments)
ltree lca(ltree[])
Returns Lowest Common Ancestor (lca)

Have you read README.ltree ?

>
>
> Thanks and sorry to come bother you !
> Regards,
> PF Caillaud
>

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83