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    ‰d«7  ã                   @   s*   d dl mZ d dlmZ G dd„ dƒZdS )é    )ÚProgrammingError)Úcached_propertyc                   @   sJ  e Zd ZdZdZdZdZdZg ZdZ	dZ
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dddddddddœZ5dZ6dZ7dZ8dZ9dZ:dZ;dZ<dZ=dZ>dZ?dZ@dZAdZBdZCdZDdZEdZFeGZHdZIdZJdZKdZLdZMdZNdZOdZPdZQdZRdZSdZTdZUdZVdZWdZXdZYdZZdZ[dZ\dZ]dZ^dZ_e`ƒ ZadZbdZcdZddZedZfdZgdZhdZidZjdZkdZldZmdZndZodZpdZqdZrdZsdZtdZudZvdZwdZxdZydZzdddddœZ{dZ|e`ƒ Z}i Z~dd„ Ze€dd„ ƒZe€dd„ ƒZ‚dd„ ZƒdS )ÚBaseDatabaseFeaturesNFTÚ	AutoFieldÚBigAutoFieldÚBigIntegerFieldÚBinaryFieldÚBooleanFieldÚ	CharFieldÚDurationFieldÚGenericIPAddressFieldÚIntegerFieldÚPositiveBigIntegerFieldÚPositiveIntegerFieldÚPositiveSmallIntegerFieldÚSmallAutoFieldÚSmallIntegerFieldÚ	TimeField)r   r   r   r   r	   r
   r   r   r   r   r   r   r   r   r   Ú é   )ÚciÚcsZnon_defaultZ
swedish_cic                 C   s
   || _ d S )N)Ú
connection)Úselfr   © r   úD/tmp/pip-unpacked-wheel-7vj2equ7/django/db/backends/base/features.pyÚ__init__^  s    zBaseDatabaseFeatures.__init__c                 C   s   | j jjdk	S )z5Does this backend support explaining query execution?N)r   ÚopsZexplain_prefix)r   r   r   r   Ú#supports_explaining_query_executiona  s    z8BaseDatabaseFeatures.supports_explaining_query_executionc              	   C   sr   | j  ¡ Z}| d¡ | j  d¡ | d¡ | j  ¡  | j  d¡ | d¡ | ¡ \}| d¡ W 5 Q R X |dkS )z!Confirm support for transactions.z"CREATE TABLE ROLLBACK_TEST (X INT)Fz(INSERT INTO ROLLBACK_TEST (X) VALUES (8)Tz"SELECT COUNT(X) FROM ROLLBACK_TESTzDROP TABLE ROLLBACK_TESTr   )r   ÚcursorÚexecuteZset_autocommitÚrollbackZfetchone)r   r   Úcountr   r   r   Úsupports_transactionsf  s    


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z*BaseDatabaseFeatures.supports_transactionsc                 C   s   | j s
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__module__Ú__qualname__Zminimum_database_versionZgis_enabledZallows_group_by_lobZallows_group_by_pkr$   Zempty_fetchmany_valueZupdate_can_self_selectZ!interprets_empty_strings_as_nullsZ$supports_nullable_unique_constraintsZ.supports_partially_nullable_unique_constraintsZ&supports_deferrable_unique_constraintsZcan_use_chunked_readsZcan_return_columns_from_insertZ can_return_rows_from_bulk_insertZhas_bulk_insertZuses_savepointsZcan_release_savepointsZrelated_fields_match_typeZallow_sliced_subqueries_with_inZhas_select_for_updateZhas_select_for_update_nowaitZ!has_select_for_update_skip_lockedZhas_select_for_update_ofZhas_select_for_no_key_updateZselect_for_update_of_columnZ#test_db_allows_multiple_connectionsZsupports_unspecified_pkZsupports_forward_referencesZtruncates_namesZhas_real_datatypeZsupports_subqueries_in_group_byZ*ignores_unnecessary_order_by_in_subqueriesZhas_native_uuid_fieldZhas_native_duration_fieldZsupports_temporal_subtractionZsupports_regex_backreferencingZ!supports_date_lookup_using_stringZsupports_timezonesZhas_zoneinfo_databaseZ-requires_explicit_null_ordering_when_groupingZnulls_order_largestZ supports_order_by_nulls_modifierZorder_by_nulls_firstZmax_query_paramsZallows_auto_pk_0Zcan_defer_constraint_checksZsupports_tablespacesZsupports_sequence_resetZcan_introspect_defaultZcan_introspect_foreign_keysZintrospected_field_typesZsupports_index_column_orderingZ!can_introspect_materialized_viewsZcan_distinct_on_fieldsZatomic_transactionsZcan_rollback_ddlZ!supports_atomic_references_renameZsupports_combined_altersZsupports_foreign_keysZcan_create_inline_fkZcan_rename_indexZindexes_foreign_keysZ!supports_column_check_constraintsZ supports_table_check_constraintsZ can_introspect_check_constraintsZsupports_paramstyle_pyformatZrequires_literal_defaultsZconnection_persists_old_columnsr   Zclosed_cursor_error_classZhas_case_insensitive_likeZbare_select_suffixZimplied_column_nullZ%supports_select_for_update_with_limitZgreatest_least_ignores_nullsZcan_clone_databasesZignores_table_name_caseZfor_update_after_fromZsupports_select_unionZsupports_select_intersectionZsupports_select_differenceZ%supports_slicing_ordering_in_compoundZ supports_parentheses_in_compoundZ supports_aggregate_filter_clauseZsupports_index_on_text_fieldZsupports_over_clauseZ#supports_frame_range_fixed_distanceZ4only_supports_unbounded_with_preceding_and_followingZsupports_cast_with_precisionZtime_cast_precisionZ(create_test_procedure_without_params_sqlZ(create_test_procedure_with_int_param_sqlZsupports_callproc_kwargsÚsetZsupported_explain_formatsZsupports_default_in_lead_lagZsupports_ignore_conflictsZsupports_update_conflictsZ%supports_update_conflicts_with_targetZrequires_casted_case_in_updatesZsupports_partial_indexesZ%supports_functions_in_partial_indexesZsupports_covering_indexesZsupports_expression_indexesZcollate_as_index_expressionZ*allows_multiple_constraints_on_same_fieldsZ&supports_boolean_expr_in_select_clauseZsupports_comparing_boolean_exprZsupports_json_fieldZcan_introspect_json_fieldZ!supports_primitives_in_json_fieldZhas_native_json_fieldZhas_json_operatorsZsupports_json_field_containsZ-json_key_contains_list_matching_requires_listZhas_json_object_functionZsupports_collation_on_charfieldZsupports_collation_on_textfieldZ%supports_non_deterministic_collationsZsupports_logical_xorZtest_collationsZtest_now_utc_templateZdjango_test_expected_failuresZdjango_test_skipsr   r   r   r#   r&   r   r   r   r   r      s&  ñü

r   N)Z	django.dbr   Zdjango.utils.functionalr   r   r   r   r   r   Ú<module>   s   