"""

 This module provides the backend for spatial SQL construction with Django.

 Specifically, this module will import the correct routines and modules

 needed for GeoDjango to interface with the spatial database.

"""

from django.conf import settings

from django.contrib.gis.db.backend.util import gqn

# Retrieving the necessary settings from the backend.

if settings.DATABASE_ENGINE == 'postgresql_psycopg2':

    from django.contrib.gis.db.backend.postgis import create_spatial_db, get_geo_where_clause, SpatialBackend

elif settings.DATABASE_ENGINE == 'oracle':

    from django.contrib.gis.db.backend.oracle import create_spatial_db, get_geo_where_clause, SpatialBackend

elif settings.DATABASE_ENGINE == 'mysql':

    from django.contrib.gis.db.backend.mysql import create_spatial_db, get_geo_where_clause, SpatialBackend

else:

    raise NotImplementedError('No Geographic Backend exists for %s' % settings.DATABASE_ENGINE)