docs: def emit_db_sequence_updates(engine):
      """Set database sequence objects to match the source db
  
         Relevant only when generated from SQLAlchemy connection.
         Needed to avoid subsequent unique key violations after DB build."""
  
      if engine and engine.name == 'postgresql':
          # not implemented for other RDBMS; necessity unknown
          conn = engine.connect()
          qry = """SELECT 'SELECT last_value FROM ' || n.nspname ||
                           '.' || c.relname || ';' AS qry,
                          n.nspname || '.' || c.relname AS qual_name
                   FROM   pg_namespace n
                   JOIN   pg_class c ON (n.oid = c.relnamespace)
                   WHERE  c.relkind = 'S'"""
          for (qry, qual_name) in list(conn.execute(qry)):
              (lastval, ) = conn.execute(qry).first()
              nextval = int(lastval) + 1
              yield "ALTER SEQUENCE %s RESTART WITH %s;" % (qual_name, nextval)