Applied Stuart's patch to the 2.4.0 code. A few changes:

  1. when checking to see if the db exists, add a conn.close() for
     the schema branch.
  2. add some more logging when a command errors. Include the
     command and arguments being run.
  3. add logging to schema path to parallel logging to non-schema path.

Also to set up a role/user (rounduptest) to be able to create a schema
in the database rounduptest run:

   grant create on database rounduptest to rounduptest;

To add/remove createdb to a role use:

  alter role rounduptest CREATEDB;

  alter role rounduptest NOCREATEDB;

Also get a better name for db_schema_split(). Maybe get_db_schema_names().

TBD testing:

  1) set up another rounduptest_schema db with rounduptest_schema user
  2) verify that trying to initialize the db with
         RDBMS_NAME=rounduptest_schema
     user fails with Runtime Error with permission error.
  3) initialize with the RDBMS_NAME=rounduptest_schema.rounduptest
  4) run postgresql tests against using rounduptest_schema.rounduptest.

This will take quite a while. Maybe consider a subset of the full
postgresql test suite for use by the schema branch? How to do this?
Maybe use pytest mark pg_schema registered using pytest_configure
to limit the run somehow?