-# Create btree_gist extensions
-psql -v ON_ERROR_STOP=1 -U "$POSTGRES_USER" -c "CREATE EXTENSION btree_gist" openstreetmap
+# Define custom functions
+psql -v ON_ERROR_STOP=1 -U "$POSTGRES_USER" -f "/usr/local/share/osm-db-functions.sql" openstreetmap