[Pkg-postgresql-public] Non-versionized extension package aliases?

[Ole Streicher]

Hi,

an upcoming package (gavodachs, ITP #870457) depends on the availability
of certain postgres extensions (q3c, pgsphere). However, there are only
extension packages depending on specific Postgresql versions. Currently,
the dependency is now written as

Depends: postgresql-9.6-pgsphere | postgresql-9.4-pgsphere | [...],
         postgresql-9.6-q3c | postgresql-9.4-q3c | [...],

etc.
This is a bit unfortunate, since it makes it difficult to do a postgres
transition, or a backport of the package.

Is there already a solution for this? Shall I use

Provides: postgresql-pgsphere

for all versionized extension packages?

Best regards

Ole