We use "CREATE DATABASE foo TEMPLATE foo_bk" to restore development databases to a known snapshot (ex: prior to testing DB migrations). Currently psql only autocompletes "foo_bk" if it's marked as a template database. It's mildly inconvenient to have to type out the entire database name (as they're not marked as templates).
The CREATE DATABASE command allows a super user to use any database as the template, and a non-super user (with CREATEDB privilege) to use any database of which it's the owner.
The attached patch updates the psql "CREATE DATABASE ... TEMPLATE <tab>" completion to match what the command actually allows.
Regards,
-- Sehrope Sarkuni
