153 lines
6.1 KiB
Python
153 lines
6.1 KiB
Python
from django.db import DatabaseError, InterfaceError
|
|
from django.db.backends.base.features import BaseDatabaseFeatures
|
|
from django.utils.functional import cached_property
|
|
|
|
|
|
class DatabaseFeatures(BaseDatabaseFeatures):
|
|
minimum_database_version = (19,)
|
|
# Oracle crashes with "ORA-00932: inconsistent datatypes: expected - got
|
|
# BLOB" when grouping by LOBs (#24096).
|
|
allows_group_by_lob = False
|
|
allows_group_by_select_index = False
|
|
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_columns_from_insert = True
|
|
supports_subqueries_in_group_by = False
|
|
ignores_unnecessary_order_by_in_subqueries = False
|
|
supports_transactions = True
|
|
supports_timezones = False
|
|
has_native_duration_field = True
|
|
can_defer_constraint_checks = True
|
|
supports_partially_nullable_unique_constraints = False
|
|
supports_deferrable_unique_constraints = True
|
|
truncates_names = True
|
|
supports_comments = True
|
|
supports_tablespaces = True
|
|
supports_sequence_reset = False
|
|
can_introspect_materialized_views = True
|
|
atomic_transactions = 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
|
|
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;
|
|
"""
|
|
create_test_table_with_composite_primary_key = """
|
|
CREATE TABLE test_table_composite_pk (
|
|
column_1 NUMBER(11) NOT NULL,
|
|
column_2 NUMBER(11) NOT NULL,
|
|
PRIMARY KEY (column_1, column_2)
|
|
)
|
|
"""
|
|
supports_callproc_kwargs = True
|
|
supports_over_clause = True
|
|
supports_frame_range_fixed_distance = True
|
|
supports_ignore_conflicts = False
|
|
max_query_params = 2**16 - 1
|
|
supports_partial_indexes = False
|
|
can_rename_index = True
|
|
supports_slicing_ordering_in_compound = True
|
|
requires_compound_order_by_subquery = True
|
|
allows_multiple_constraints_on_same_fields = False
|
|
supports_boolean_expr_in_select_clause = False
|
|
supports_comparing_boolean_expr = False
|
|
supports_primitives_in_json_field = False
|
|
supports_json_field_contains = False
|
|
supports_collation_on_textfield = False
|
|
test_collations = {
|
|
"ci": "BINARY_CI",
|
|
"cs": "BINARY",
|
|
"non_default": "SWEDISH_CI",
|
|
"swedish_ci": "SWEDISH_CI",
|
|
}
|
|
test_now_utc_template = "CURRENT_TIMESTAMP AT TIME ZONE 'UTC'"
|
|
|
|
django_test_skips = {
|
|
"Oracle doesn't support SHA224.": {
|
|
"db_functions.text.test_sha224.SHA224Tests.test_basic",
|
|
"db_functions.text.test_sha224.SHA224Tests.test_transform",
|
|
},
|
|
"Oracle doesn't correctly calculate ISO 8601 week numbering before "
|
|
"1583 (the Gregorian calendar was introduced in 1582).": {
|
|
"db_functions.datetime.test_extract_trunc.DateFunctionTests."
|
|
"test_trunc_week_before_1000",
|
|
"db_functions.datetime.test_extract_trunc.DateFunctionWithTimeZoneTests."
|
|
"test_trunc_week_before_1000",
|
|
},
|
|
"Oracle extracts seconds including fractional seconds (#33517).": {
|
|
"db_functions.datetime.test_extract_trunc.DateFunctionTests."
|
|
"test_extract_second_func_no_fractional",
|
|
"db_functions.datetime.test_extract_trunc.DateFunctionWithTimeZoneTests."
|
|
"test_extract_second_func_no_fractional",
|
|
},
|
|
"Oracle doesn't support bitwise XOR.": {
|
|
"expressions.tests.ExpressionOperatorTests.test_lefthand_bitwise_xor",
|
|
"expressions.tests.ExpressionOperatorTests.test_lefthand_bitwise_xor_null",
|
|
"expressions.tests.ExpressionOperatorTests."
|
|
"test_lefthand_bitwise_xor_right_null",
|
|
},
|
|
"Oracle requires ORDER BY in row_number, ANSI:SQL doesn't.": {
|
|
"expressions_window.tests.WindowFunctionTests.test_row_number_no_ordering",
|
|
},
|
|
"Raises ORA-00600: internal error code.": {
|
|
"model_fields.test_jsonfield.TestQuerying.test_usage_in_subquery",
|
|
},
|
|
"Oracle doesn't support changing collations on indexed columns (#33671).": {
|
|
"migrations.test_operations.OperationTests."
|
|
"test_alter_field_pk_fk_db_collation",
|
|
},
|
|
}
|
|
django_test_expected_failures = {
|
|
# A bug in Django/cx_Oracle with respect to string handling (#23843).
|
|
"annotations.tests.NonAggregateAnnotationTestCase.test_custom_functions",
|
|
"annotations.tests.NonAggregateAnnotationTestCase."
|
|
"test_custom_functions_can_ref_other_functions",
|
|
}
|
|
|
|
@cached_property
|
|
def introspected_field_types(self):
|
|
return {
|
|
**super().introspected_field_types,
|
|
"GenericIPAddressField": "CharField",
|
|
"PositiveBigIntegerField": "BigIntegerField",
|
|
"PositiveIntegerField": "IntegerField",
|
|
"PositiveSmallIntegerField": "IntegerField",
|
|
"SmallIntegerField": "IntegerField",
|
|
"TimeField": "DateTimeField",
|
|
}
|
|
|
|
@cached_property
|
|
def supports_collation_on_charfield(self):
|
|
with self.connection.cursor() as cursor:
|
|
try:
|
|
cursor.execute("SELECT CAST('a' AS VARCHAR2(4001)) FROM dual")
|
|
except DatabaseError as e:
|
|
if e.args[0].code == 910:
|
|
return False
|
|
raise
|
|
return True
|