B
    CVvg                 @   s`   d dl Z d dlZd dlmZ d dlmZ d dlmZ d dlm	Z	 ddl
mZ G dd	 d	eZdS )
    N)transaction)BaseDatabaseFeatures)OperationalError)cached_property   )Databasec                   s  e Zd ZdZdZdZdZdZdZdZ	dZ
dZdZdZdZdZdZdZdZdZejdkZdZejdkZeZejdkZejdkZejdkZejd	kZejd
kZdZdZ ddddZ!e"dd Z#e"dd Z$e" fddZ%e"dd Z&e'e()dZ*e'e()dZ+  Z,S )DatabaseFeaturesTFi     )r	      r   )r	      r   )r	      r   )r	      r   )r	      r   )r	   r   r   Znocasebinary)ZcicsZnon_defaultc             C   sP   dhddddhdhd}t jdk r2|d	d
hi | j rL|ddhi |S )NzZmodel_fields.test_decimalfield.DecimalFieldTests.test_fetch_from_db_without_float_roundingz<schema.tests.SchemaTests.test_unique_no_unnecessary_fk_dropsz4schema.tests.SchemaTests.test_unique_and_reverse_m2mzHschema.tests.SchemaTests.test_alter_field_default_doesnt_perform_querieszKschema.tests.SchemaTests.test_rename_column_renames_deferred_sql_referenceszMmodel_fields.test_integerfield.PositiveIntegerFieldTests.test_negative_values)z6SQLite stores values rounded to 15 significant digits.z5SQLite naively remakes the table on field alteration.z!SQLite doesn't have a constraint.)r	      z*Nondeterministic failure on SQLite < 3.27.zIexpressions_window.tests.WindowFunctionTests.test_subquery_row_range_rankzOthe sqlite backend's close() method is a no-op when using an in-memory databasezJservers.test_liveserverthread.LiveServerThreadTest.test_closes_connections)r   sqlite_version_infoupdate
connectionZis_in_memory_db)selfskips r   G/tmp/pip-install-o3oxmrkh/Django/django/db/backends/sqlite3/features.pydjango_test_skips5   s    




z"DatabaseFeatures.django_test_skipsc             C   s*   t  d dr tjdkr dS tjdkS )Nr   z10.15.)r	   r   r   F)r	      r   )platformmac_ver
startswithr   r   )r   r   r   r   !supports_atomic_references_renameT   s    z2DatabaseFeatures.supports_atomic_references_renamec                s   t  jdddddS )NZ	AutoFieldZBigIntegerFieldZ	CharField)ZBigAutoFieldZDurationFieldZGenericIPAddressFieldZSmallAutoField)superintrospected_field_types)r   )	__class__r   r   r    \   s
    z)DatabaseFeatures.introspected_field_typesc          
   C   sX   | j  D}y(t| j j |d W d Q R X W n tk
rH   dS X W d Q R X dS )NzSELECT JSON('{"a": "b"}')FT)r   cursorr   Zatomicaliasexecuter   )r   r"   r   r   r   supports_json_fieldf   s    z$DatabaseFeatures.supports_json_fieldr%   )-__name__
__module____qualname__Zcan_use_chunked_readsZ#test_db_allows_multiple_connectionsZsupports_unspecified_pkZsupports_timezonesZmax_query_paramsZ(supports_mixed_date_datetime_comparisonsZsupports_transactionsZatomic_transactionsZcan_rollback_ddlZcan_create_inline_fkZsupports_paramstyle_pyformatZcan_clone_databasesZsupports_temporal_subtractionZignores_table_name_caseZsupports_cast_with_precisionZtime_cast_precisionZcan_release_savepointsr   r   Zcan_alter_table_rename_columnZ supports_parentheses_in_compoundZ!supports_pragma_foreign_key_checkZcan_defer_constraint_checksZ%supports_functions_in_partial_indexesZsupports_over_clauseZ#supports_frame_range_fixed_distanceZ supports_aggregate_filter_clauseZ supports_order_by_nulls_modifierZorder_by_nulls_firstZsupports_json_field_containsZtest_collationsr   r   r   r    r%   propertyoperator
attrgetterZcan_introspect_json_fieldZhas_json_object_function__classcell__r   r   )r!   r   r      sJ   








r   )r*   r   Z	django.dbr   Z django.db.backends.base.featuresr   Zdjango.db.utilsr   Zdjango.utils.functionalr   baser   r   r   r   r   r   <module>   s   