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- import sys
-
- from django.db.backends.base.features import BaseDatabaseFeatures
-
- from .base import Database
-
-
- class DatabaseFeatures(BaseDatabaseFeatures):
- # SQLite can read from a cursor since SQLite 3.6.5, subject to the caveat
- # that statements within a connection aren't isolated from each other. See
- # https://sqlite.org/isolation.html.
- can_use_chunked_reads = True
- test_db_allows_multiple_connections = False
- supports_unspecified_pk = True
- supports_timezones = False
- max_query_params = 999
- supports_mixed_date_datetime_comparisons = False
- autocommits_when_autocommit_is_off = sys.version_info < (3, 6)
- can_introspect_autofield = True
- can_introspect_decimal_field = False
- can_introspect_duration_field = False
- can_introspect_positive_integer_field = True
- can_introspect_small_integer_field = True
- introspected_big_auto_field_type = 'AutoField'
- supports_transactions = True
- atomic_transactions = False
- can_rollback_ddl = True
- supports_atomic_references_rename = Database.sqlite_version_info >= (3, 26, 0)
- supports_paramstyle_pyformat = False
- supports_sequence_reset = False
- can_clone_databases = True
- supports_temporal_subtraction = True
- ignores_table_name_case = True
- supports_cast_with_precision = False
- time_cast_precision = 3
- can_release_savepoints = True
- # Is "ALTER TABLE ... RENAME COLUMN" supported?
- can_alter_table_rename_column = Database.sqlite_version_info >= (3, 25, 0)
- supports_parentheses_in_compound = False
- # Deferred constraint checks can be emulated on SQLite < 3.20 but not in a
- # reasonably performant way.
- supports_pragma_foreign_key_check = Database.sqlite_version_info >= (3, 20, 0)
- can_defer_constraint_checks = supports_pragma_foreign_key_check
- supports_functions_in_partial_indexes = Database.sqlite_version_info >= (3, 15, 0)
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