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from django.db.backends.base.features import BaseDatabaseFeatures
from django.db.utils import InterfaceError
from django.utils.functional import cached_property
class DatabaseFeatures(BaseDatabaseFeatures):
interprets_empty_strings_as_nulls = True
has_select_for_update = True
has_select_for_update_nowait = True
has_select_for_update_skip_locked = True
has_select_for_update_of = True
select_for_update_of_column = True
can_return_id_from_insert = True
can_introspect_autofield = True
supports_subqueries_in_group_by = False
supports_transactions = True
supports_timezones = False
has_native_duration_field = True
can_defer_constraint_checks = True
supports_partially_nullable_unique_constraints = False
truncates_names = True
supports_tablespaces = True
supports_sequence_reset = False
can_introspect_materialized_views = True
can_introspect_time_field = False
atomic_transactions = False
supports_combined_alters = False
nulls_order_largest = True
requires_literal_defaults = True
closed_cursor_error_class = InterfaceError
bare_select_suffix = " FROM DUAL"
# select for update with limit can be achieved on Oracle, but not with the current backend.
supports_select_for_update_with_limit = False
supports_temporal_subtraction = True
# Oracle doesn't ignore quoted identifiers case but the current backend
# does by uppercasing all identifiers.
ignores_table_name_case = True
supports_index_on_text_field = False
has_case_insensitive_like = False
create_test_procedure_without_params_sql = """
CREATE PROCEDURE "TEST_PROCEDURE" AS
V_I INTEGER;
BEGIN
V_I := 1;
END;
"""
create_test_procedure_with_int_param_sql = """
CREATE PROCEDURE "TEST_PROCEDURE" (P_I INTEGER) AS
V_I INTEGER;
BEGIN
V_I := P_I;
END;
"""
supports_callproc_kwargs = True
supports_over_clause = True
supports_ignore_conflicts = False
max_query_params = 2**16 - 1
supports_partial_indexes = False
allows_multiple_constraints_on_same_fields = False
@cached_property
def has_fetch_offset_support(self):
return self.connection.oracle_version >= (12, 2)
@cached_property
def allow_sliced_subqueries_with_in(self):
return self.has_fetch_offset_support
@cached_property
def supports_slicing_ordering_in_compound(self):
return self.has_fetch_offset_support
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