django.db.backends.base.features.BaseDatabaseFeatures

class documentation

class BaseDatabaseFeatures:

Known subclasses: django.db.backends.dummy.features.DummyDatabaseFeatures, django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

View In Hierarchy

Undocumented

Method	`__init__`	Undocumented
Method	`allows_group_by_selected_pks_on_model`	Undocumented
Class Variable	`allow_sliced_subqueries_with_in`	Undocumented
Class Variable	`allows_auto_pk_0`	Undocumented
Class Variable	`allows_group_by_lob`	Undocumented
Class Variable	`allows_group_by_pk`	Undocumented
Class Variable	`allows_group_by_selected_pks`	Undocumented
Class Variable	`allows_multiple_constraints_on_same_fields`	Undocumented
Class Variable	`atomic_transactions`	Undocumented
Class Variable	`bare_select_suffix`	Undocumented
Class Variable	`can_clone_databases`	Undocumented
Class Variable	`can_create_inline_fk`	Undocumented
Class Variable	`can_defer_constraint_checks`	Undocumented
Class Variable	`can_distinct_on_fields`	Undocumented
Class Variable	`can_introspect_check_constraints`	Undocumented
Class Variable	`can_introspect_default`	Undocumented
Class Variable	`can_introspect_foreign_keys`	Undocumented
Class Variable	`can_introspect_json_field`	Undocumented
Class Variable	`can_introspect_materialized_views`	Undocumented
Class Variable	`can_release_savepoints`	Undocumented
Class Variable	`can_return_columns_from_insert`	Undocumented
Class Variable	`can_return_rows_from_bulk_insert`	Undocumented
Class Variable	`can_rollback_ddl`	Undocumented
Class Variable	`can_use_chunked_reads`	Undocumented
Class Variable	`collate_as_index_expression`	Undocumented
Class Variable	`connection_persists_old_columns`	Undocumented
Class Variable	`create_test_procedure_with_int_param_sql`	Undocumented
Class Variable	`create_test_procedure_without_params_sql`	Undocumented
Class Variable	`django_test_expected_failures`	Undocumented
Class Variable	`django_test_skips`	Undocumented
Class Variable	`empty_fetchmany_value`	Undocumented
Class Variable	`for_update_after_from`	Undocumented
Class Variable	`gis_enabled`	Undocumented
Class Variable	`greatest_least_ignores_nulls`	Undocumented
Class Variable	`has_bulk_insert`	Undocumented
Class Variable	`has_case_insensitive_like`	Undocumented
Class Variable	`has_json_object_function`	Undocumented
Class Variable	`has_json_operators`	Undocumented
Class Variable	`has_native_duration_field`	Undocumented
Class Variable	`has_native_json_field`	Undocumented
Class Variable	`has_native_uuid_field`	Undocumented
Class Variable	`has_real_datatype`	Undocumented
Class Variable	`has_select_for_no_key_update`	Undocumented
Class Variable	`has_select_for_update`	Undocumented
Class Variable	`has_select_for_update_nowait`	Undocumented
Class Variable	`has_select_for_update_of`	Undocumented
Class Variable	`has_select_for_update_skip_locked`	Undocumented
Class Variable	`has_zoneinfo_database`	Undocumented
Class Variable	`ignores_table_name_case`	Undocumented
Class Variable	`ignores_unnecessary_order_by_in_subqueries`	Undocumented
Class Variable	`implied_column_null`	Undocumented
Class Variable	`indexes_foreign_keys`	Undocumented
Class Variable	`interprets_empty_strings_as_nulls`	Undocumented
Class Variable	`introspected_field_types`	Undocumented
Class Variable	`json_key_contains_list_matching_requires_list`	Undocumented
Class Variable	`max_query_params`	Undocumented
Class Variable	`nulls_order_largest`	Undocumented
Class Variable	`only_supports_unbounded_with_preceding_and_following`	Undocumented
Class Variable	`order_by_nulls_first`	Undocumented
Class Variable	`related_fields_match_type`	Undocumented
Class Variable	`requires_casted_case_in_updates`	Undocumented
Class Variable	`requires_explicit_null_ordering_when_grouping`	Undocumented
Class Variable	`requires_literal_defaults`	Undocumented
Class Variable	`select_for_update_of_column`	Undocumented
Class Variable	`supported_explain_formats`	Undocumented
Class Variable	`supports_aggregate_filter_clause`	Undocumented
Class Variable	`supports_atomic_references_rename`	Undocumented
Class Variable	`supports_boolean_expr_in_select_clause`	Undocumented
Class Variable	`supports_callproc_kwargs`	Undocumented
Class Variable	`supports_cast_with_precision`	Undocumented
Class Variable	`supports_collation_on_charfield`	Undocumented
Class Variable	`supports_collation_on_textfield`	Undocumented
Class Variable	`supports_column_check_constraints`	Undocumented
Class Variable	`supports_combined_alters`	Undocumented
Class Variable	`supports_covering_indexes`	Undocumented
Class Variable	`supports_date_lookup_using_string`	Undocumented
Class Variable	`supports_default_in_lead_lag`	Undocumented
Class Variable	`supports_deferrable_unique_constraints`	Undocumented
Class Variable	`supports_expression_indexes`	Undocumented
Class Variable	`supports_foreign_keys`	Undocumented
Class Variable	`supports_forward_references`	Undocumented
Class Variable	`supports_frame_range_fixed_distance`	Undocumented
Class Variable	`supports_functions_in_partial_indexes`	Undocumented
Class Variable	`supports_ignore_conflicts`	Undocumented
Class Variable	`supports_index_column_ordering`	Undocumented
Class Variable	`supports_index_on_text_field`	Undocumented
Class Variable	`supports_json_field`	Undocumented
Class Variable	`supports_json_field_contains`	Undocumented
Class Variable	`supports_mixed_date_datetime_comparisons`	Undocumented
Class Variable	`supports_non_deterministic_collations`	Undocumented
Class Variable	`supports_nullable_unique_constraints`	Undocumented
Class Variable	`supports_order_by_nulls_modifier`	Undocumented
Class Variable	`supports_over_clause`	Undocumented
Class Variable	`supports_paramstyle_pyformat`	Undocumented
Class Variable	`supports_parentheses_in_compound`	Undocumented
Class Variable	`supports_partial_indexes`	Undocumented
Class Variable	`supports_partially_nullable_unique_constraints`	Undocumented
Class Variable	`supports_primitives_in_json_field`	Undocumented
Class Variable	`supports_regex_backreferencing`	Undocumented
Class Variable	`supports_select_difference`	Undocumented
Class Variable	`supports_select_for_update_with_limit`	Undocumented
Class Variable	`supports_select_intersection`	Undocumented
Class Variable	`supports_select_union`	Undocumented
Class Variable	`supports_sequence_reset`	Undocumented
Class Variable	`supports_slicing_ordering_in_compound`	Undocumented
Class Variable	`supports_subqueries_in_group_by`	Undocumented
Class Variable	`supports_table_check_constraints`	Undocumented
Class Variable	`supports_tablespaces`	Undocumented
Class Variable	`supports_temporal_subtraction`	Undocumented
Class Variable	`supports_timezones`	Undocumented
Class Variable	`supports_unspecified_pk`	Undocumented
Class Variable	`test_collations`	Undocumented
Class Variable	`test_db_allows_multiple_connections`	Undocumented
Class Variable	`test_now_utc_template`	Undocumented
Class Variable	`time_cast_precision`	Undocumented
Class Variable	`truncates_names`	Undocumented
Class Variable	`update_can_self_select`	Undocumented
Class Variable	`uses_savepoints`	Undocumented
Class Variable	`validates_explain_options`	Undocumented
Instance Variable	`connection`	Undocumented
Property	`supports_explaining_query_execution`	Does this backend support explaining query execution?
Property	`supports_transactions`	Confirm support for transactions.

def __init__(self, connection):

Undocumented

def allows_group_by_selected_pks_on_model(self, model):

Undocumented

allow_sliced_subqueries_with_in: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

allows_auto_pk_0: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

allows_group_by_lob: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

allows_group_by_pk: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

allows_group_by_selected_pks: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

allows_multiple_constraints_on_same_fields: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

atomic_transactions: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

bare_select_suffix: str =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

can_clone_databases: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_create_inline_fk: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_defer_constraint_checks: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

can_distinct_on_fields: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

can_introspect_check_constraints: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

can_introspect_default: bool =

Undocumented

can_introspect_foreign_keys: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

can_introspect_json_field: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_introspect_materialized_views: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

can_release_savepoints: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_return_columns_from_insert: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_return_rows_from_bulk_insert: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_rollback_ddl: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

can_use_chunked_reads: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

collate_as_index_expression: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

connection_persists_old_columns: bool =

Undocumented

create_test_procedure_with_int_param_sql =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

create_test_procedure_without_params_sql =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

django_test_expected_failures: set =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

django_test_skips: dict =

Undocumented

empty_fetchmany_value: list =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

for_update_after_from: bool =

Undocumented

gis_enabled: bool =

Undocumented

greatest_least_ignores_nulls: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_bulk_insert: bool =

Undocumented

has_case_insensitive_like: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_json_object_function: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

has_json_operators: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_native_duration_field: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_native_json_field: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_native_uuid_field: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_real_datatype: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_select_for_no_key_update: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_select_for_update: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_select_for_update_nowait: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_select_for_update_of: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_select_for_update_skip_locked: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

has_zoneinfo_database: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

ignores_table_name_case: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

ignores_unnecessary_order_by_in_subqueries: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

implied_column_null: bool =

Undocumented

indexes_foreign_keys: bool =

Undocumented

interprets_empty_strings_as_nulls: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

introspected_field_types: dict[str, str] =

Undocumented

json_key_contains_list_matching_requires_list: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

max_query_params =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

nulls_order_largest: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

only_supports_unbounded_with_preceding_and_following: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

order_by_nulls_first: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

related_fields_match_type: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

requires_casted_case_in_updates: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

requires_explicit_null_ordering_when_grouping: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

requires_literal_defaults: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

select_for_update_of_column: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supported_explain_formats: set =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_aggregate_filter_clause: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_atomic_references_rename: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_boolean_expr_in_select_clause: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_callproc_kwargs: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_cast_with_precision: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_collation_on_charfield: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_collation_on_textfield: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_column_check_constraints: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_combined_alters: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_covering_indexes: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_date_lookup_using_string: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_default_in_lead_lag: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_deferrable_unique_constraints: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_expression_indexes: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_foreign_keys: bool =

Undocumented

supports_forward_references: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_frame_range_fixed_distance: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_functions_in_partial_indexes: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_ignore_conflicts: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_index_column_ordering: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_index_on_text_field: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_json_field: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_json_field_contains: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_mixed_date_datetime_comparisons: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_non_deterministic_collations: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_nullable_unique_constraints: bool =

Undocumented

supports_order_by_nulls_modifier: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_over_clause: bool =

Undocumented

supports_paramstyle_pyformat: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_parentheses_in_compound: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_partial_indexes: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_partially_nullable_unique_constraints: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_primitives_in_json_field: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_regex_backreferencing: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_select_difference: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_select_for_update_with_limit: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_select_intersection: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_select_union: bool =

Undocumented

supports_sequence_reset: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_slicing_ordering_in_compound: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_subqueries_in_group_by: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

supports_table_check_constraints: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

supports_tablespaces: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

supports_temporal_subtraction: bool =

Undocumented

supports_timezones: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

supports_unspecified_pk: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

test_collations: dict =

Undocumented

test_db_allows_multiple_connections: bool =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

test_now_utc_template =

overridden in django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

time_cast_precision: int =

overridden in django.db.backends.sqlite3.features.DatabaseFeatures

Undocumented

truncates_names: bool =

overridden in django.db.backends.oracle.features.DatabaseFeatures

Undocumented

update_can_self_select: bool =

overridden in django.db.backends.mysql.features.DatabaseFeatures

Undocumented

uses_savepoints: bool =

overridden in django.db.backends.dummy.features.DummyDatabaseFeatures

Undocumented

validates_explain_options: bool =

overridden in django.db.backends.postgresql.features.DatabaseFeatures

Undocumented

connection =

Undocumented

@cached_property
supports_explaining_query_execution =

Does this backend support explaining query execution?

@cached_property
supports_transactions =

overridden in django.db.backends.dummy.features.DummyDatabaseFeatures, django.db.backends.mysql.features.DatabaseFeatures, django.db.backends.oracle.features.DatabaseFeatures, django.db.backends.postgresql.features.DatabaseFeatures, django.db.backends.sqlite3.features.DatabaseFeatures

Confirm support for transactions.