django1/django/contrib/gis/db/backends/oracle/creation.py

43 lines
2.2 KiB
Python
Raw Normal View History

from django.db.backends.oracle.creation import DatabaseCreation
from django.db.backends.util import truncate_name
class OracleCreation(DatabaseCreation):
def sql_indexes_for_field(self, model, f, style):
"Return any spatial index creation SQL for the field."
from django.contrib.gis.db.models.fields import GeometryField
output = super(OracleCreation, self).sql_indexes_for_field(model, f, style)
if isinstance(f, GeometryField):
gqn = self.connection.ops.geo_quote_name
qn = self.connection.ops.quote_name
db_table = model._meta.db_table
output.append(style.SQL_KEYWORD('INSERT INTO ') +
style.SQL_TABLE('USER_SDO_GEOM_METADATA') +
' (%s, %s, %s, %s)\n ' % tuple(map(qn, ['TABLE_NAME', 'COLUMN_NAME', 'DIMINFO', 'SRID'])) +
style.SQL_KEYWORD(' VALUES ') + '(\n ' +
style.SQL_TABLE(gqn(db_table)) + ',\n ' +
style.SQL_FIELD(gqn(f.column)) + ',\n ' +
style.SQL_KEYWORD("MDSYS.SDO_DIM_ARRAY") + '(\n ' +
style.SQL_KEYWORD("MDSYS.SDO_DIM_ELEMENT") +
("('LONG', %s, %s, %s),\n " % (f._extent[0], f._extent[2], f._tolerance)) +
style.SQL_KEYWORD("MDSYS.SDO_DIM_ELEMENT") +
("('LAT', %s, %s, %s)\n ),\n" % (f._extent[1], f._extent[3], f._tolerance)) +
' %s\n );' % f.srid)
if f.spatial_index:
# Getting the index name, Oracle doesn't allow object
# names > 30 characters.
idx_name = truncate_name('%s_%s_id' % (db_table, f.column), 30)
output.append(style.SQL_KEYWORD('CREATE INDEX ') +
style.SQL_TABLE(qn(idx_name)) +
style.SQL_KEYWORD(' ON ') +
style.SQL_TABLE(qn(db_table)) + '(' +
style.SQL_FIELD(qn(f.column)) + ') ' +
style.SQL_KEYWORD('INDEXTYPE IS ') +
style.SQL_TABLE('MDSYS.SPATIAL_INDEX') + ';')
return output