97 lines
3.3 KiB
Python
97 lines
3.3 KiB
Python
import operator
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from django.db import InterfaceError
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from django.db.backends.base.features import BaseDatabaseFeatures
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from django.utils.functional import cached_property
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class DatabaseFeatures(BaseDatabaseFeatures):
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allows_group_by_selected_pks = True
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can_return_columns_from_insert = True
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can_return_rows_from_bulk_insert = True
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has_real_datatype = True
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has_native_uuid_field = True
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has_native_duration_field = True
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has_native_json_field = True
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can_defer_constraint_checks = True
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has_select_for_update = True
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has_select_for_update_nowait = True
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has_select_for_update_of = True
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has_select_for_update_skip_locked = True
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has_select_for_no_key_update = True
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can_release_savepoints = True
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supports_tablespaces = True
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supports_transactions = True
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can_introspect_materialized_views = True
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can_distinct_on_fields = True
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can_rollback_ddl = True
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supports_combined_alters = True
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nulls_order_largest = True
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closed_cursor_error_class = InterfaceError
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has_case_insensitive_like = False
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greatest_least_ignores_nulls = True
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can_clone_databases = True
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supports_temporal_subtraction = True
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supports_slicing_ordering_in_compound = True
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create_test_procedure_without_params_sql = """
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CREATE FUNCTION test_procedure () RETURNS void AS $$
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DECLARE
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V_I INTEGER;
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BEGIN
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V_I := 1;
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END;
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$$ LANGUAGE plpgsql;"""
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create_test_procedure_with_int_param_sql = """
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CREATE FUNCTION test_procedure (P_I INTEGER) RETURNS void AS $$
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DECLARE
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V_I INTEGER;
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BEGIN
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V_I := P_I;
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END;
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$$ LANGUAGE plpgsql;"""
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requires_casted_case_in_updates = True
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supports_over_clause = True
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only_supports_unbounded_with_preceding_and_following = True
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supports_aggregate_filter_clause = True
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supported_explain_formats = {'JSON', 'TEXT', 'XML', 'YAML'}
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validates_explain_options = False # A query will error on invalid options.
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supports_deferrable_unique_constraints = True
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has_json_operators = True
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json_key_contains_list_matching_requires_list = True
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test_collations = {
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'non_default': 'sv-x-icu',
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'swedish_ci': 'sv-x-icu',
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}
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django_test_skips = {
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'opclasses are PostgreSQL only.': {
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'indexes.tests.SchemaIndexesNotPostgreSQLTests.test_create_index_ignores_opclasses',
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},
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}
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@cached_property
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def introspected_field_types(self):
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return {
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**super().introspected_field_types,
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'PositiveBigIntegerField': 'BigIntegerField',
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'PositiveIntegerField': 'IntegerField',
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'PositiveSmallIntegerField': 'SmallIntegerField',
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}
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@cached_property
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def is_postgresql_11(self):
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return self.connection.pg_version >= 110000
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@cached_property
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def is_postgresql_12(self):
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return self.connection.pg_version >= 120000
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@cached_property
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def is_postgresql_13(self):
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return self.connection.pg_version >= 130000
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has_websearch_to_tsquery = property(operator.attrgetter('is_postgresql_11'))
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supports_covering_indexes = property(operator.attrgetter('is_postgresql_11'))
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supports_covering_gist_indexes = property(operator.attrgetter('is_postgresql_12'))
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supports_non_deterministic_collations = property(operator.attrgetter('is_postgresql_12'))
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