select a.gid, geomunion(b.the_geom)
Being new to PostGIS, I've been looking at other people's code snippets and trying to figure out what they do. I'm a bit mystified by "geomunion()", though, as it's not in the PostGIS docs, though there are many references to it in the mailing list archives. Is this the same as "ST_Union()" <http://postgis.refractions.net/docs/ ch06.html#id2595344>?
I see a statement at the beginning of Chapter 6 that "PostGIS has begun a transition from the existing naming convention to an SQL-MM- centric convention. As a result, most of the functions that you know and love have been renamed using the standard spatial type (ST) prefix."
From this I can conclude that ST_Union() used to be Union(), and in that section it says "NOTE: this is renamed from "union" because union is an SQL reserved word" which implies that even from very early on it was different than Union(), perhaps GeomUnion(). But if this is the case, this name change should also be explicitly documented.
If there was a general renaming from Geom* to ST_*, that is also not documented that I can find.
Confirmation requested, and if necessary documentation for all such unusual name changes.
Thanks, -- Andy _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
