Probably yes. Rendering database is a special purpose database derivative and this can be very different for different styles. One can make some mappings, but it needs some knowledge about SQL. Quite simple solution (if you have enough of disc space) is to have more databases and just switch them - this is my rough script for this purpose (gis is default database, temp gis2 is the second one): #!/bin/bash sudo service postgresql restart sudo -u postgres -H -- psql -c "alter database gis rename to temp;" sudo -u postgres -H -- psql -c "alter database gis2 rename to gis;" sudo -u postgres -H -- psql -c "alter database temp rename to gis2;"

Probably yes. Rendering database is a special purpose database derivative and this can be very different for different styles. One can make some mappings, but it needs some knowledge about SQL. Quite simple solution (if you have enough of disc space) is to have more databases and just switch them - this is my rough script for this purpose (gis is default database, temp is the second one): #!/bin/bash sudo service postgresql restart sudo -u postgres -H -- psql -c "alter database gis rename to temp;" sudo -u postgres -H -- psql -c "alter database gis2 rename to gis;" sudo -u postgres -H -- psql -c "alter database temp rename to gis2;"