58 lines
2.3 KiB
Python
58 lines
2.3 KiB
Python
|
from django.db.backends.base.features import BaseDatabaseFeatures
|
||
|
|
from django.db.utils import InterfaceError
|
||
|
|
|
||
|
|
try:
|
||
|
|
import pytz
|
||
|
|
except ImportError:
|
||
|
|
pytz = None
|
||
|
|
|
||
|
|
|
||
|
|
class DatabaseFeatures(BaseDatabaseFeatures):
|
||
|
|
empty_fetchmany_value = ()
|
||
|
|
needs_datetime_string_cast = False
|
||
|
|
interprets_empty_strings_as_nulls = True
|
||
|
|
uses_savepoints = True
|
||
|
|
has_select_for_update = True
|
||
|
|
has_select_for_update_nowait = True
|
||
|
|
can_return_id_from_insert = True
|
||
|
|
allow_sliced_subqueries = False
|
||
|
|
supports_subqueries_in_group_by = False
|
||
|
|
supports_transactions = True
|
||
|
|
supports_timezones = False
|
||
|
|
has_zoneinfo_database = pytz is not None
|
||
|
|
supports_bitwise_or = False
|
||
|
|
has_native_duration_field = True
|
||
|
|
can_defer_constraint_checks = True
|
||
|
|
supports_partially_nullable_unique_constraints = False
|
||
|
|
truncates_names = True
|
||
|
|
has_bulk_insert = True
|
||
|
|
supports_tablespaces = True
|
||
|
|
supports_sequence_reset = False
|
||
|
|
can_introspect_max_length = False
|
||
|
|
can_introspect_time_field = False
|
||
|
|
atomic_transactions = False
|
||
|
|
supports_combined_alters = False
|
||
|
|
nulls_order_largest = True
|
||
|
|
requires_literal_defaults = True
|
||
|
|
connection_persists_old_columns = True
|
||
|
|
closed_cursor_error_class = InterfaceError
|
||
|
|
bare_select_suffix = " FROM DUAL"
|
||
|
|
uppercases_column_names = True
|
||
|
|
# select for update with limit can be achieved on Oracle, but not with the current backend.
|
||
|
|
supports_select_for_update_with_limit = False
|
||
|
|
|
||
|
|
def introspected_boolean_field_type(self, field=None, created_separately=False):
|
||
|
|
"""
|
||
|
|
Some versions of Oracle -- we've seen this on 11.2.0.1 and suspect
|
||
|
|
it goes back -- have a weird bug where, when an integer column is
|
||
|
|
added to an existing table with a default, its precision is later
|
||
|
|
reported on introspection as 0, regardless of the real precision.
|
||
|
|
For Django introspection, this means that such columns are reported
|
||
|
|
as IntegerField even if they are really BigIntegerField or BooleanField.
|
||
|
|
|
||
|
|
The bug is solved in Oracle 11.2.0.2 and up.
|
||
|
|
"""
|
||
|
|
if self.connection.oracle_full_version < '11.2.0.2' and field and field.has_default() and created_separately:
|
||
|
|
return 'IntegerField'
|
||
|
|
return super(DatabaseFeatures, self).introspected_boolean_field_type(field, created_separately)
|