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71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
5 years ago
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import operator
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from django.db.backends.base.features import BaseDatabaseFeatures
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from django.db.utils import InterfaceError
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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_multiple_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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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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can_release_savepoints = True
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supports_tablespaces = True
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supports_transactions = True
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can_introspect_autofield = True
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can_introspect_ip_address_field = True
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can_introspect_materialized_views = True
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can_introspect_small_integer_field = 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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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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@cached_property
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def is_postgresql_9_6(self):
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return self.connection.pg_version >= 90600
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@cached_property
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def is_postgresql_10(self):
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return self.connection.pg_version >= 100000
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has_brin_autosummarize = property(operator.attrgetter('is_postgresql_10'))
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has_phraseto_tsquery = property(operator.attrgetter('is_postgresql_9_6'))
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supports_table_partitions = property(operator.attrgetter('is_postgresql_10'))
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