Re: gist access methods parameter types

>
> Have you looked at PostGIS?
>

Yes ofcourse, I also read everything in postgresql official documentation
plus http://gist.cs.berkeley.edu/pggist/opcltour.html.

> Yeah, I still don't think that's the right way to do it. Storing the
> bounding box seems right, but just do that for all the nodes. It's
> probably worth looking at the implementation of these functions for,
> say, the existing point, box, and polygon datatypes, which have
> similar issues.
>

I intend to change the structure I describe in the future. So if it is not
wrong and harmful to the implementation I want to keep that extra info in
leaf node entries.
I have read src/backend/access/gist/gistproc.c I am aware of what it does.

According to the documentation, no. It takes a GISTENTRY and returns
> a GISTENTRY. But you can extract the relevant key out of there. The
> best way to do this, again, is to look at existing examples, like
> gist_poly_compress.
>

Exactly what I am saying. I extract the key out of GISTENTRY of course but
that key has to contain a value of some type. And my question is of what
type if it is a leaf and of what if it is not a leaf entry?
Thank you for helping.