[postgis-devel] Upgrade paths (again)

[Regina Obe]

> Going from "with" to "without" is a bit harder. There's a perl script in
the
> repository to create an "unpackager" SQL script, that we use to unpackage
> "postgis_raster" when upgrading form PostGIS version <
> 3.0.0:
> 
>   utils/create_extension_unpackage.pl
> 
> I filed a ticket 5 years ago to provide an SQL function to do this [
> postgis_extension_unpackage() ] but for some reason it was closed (without
a
> comment) 3 years ago.
> Darafai: do you recall why ?
> 
>   https://trac.osgeo.org/postgis/ticket/3918

I've put a comment on this ticket why we don't want this.