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 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' introspected_small_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) can_create_inline_fk = False 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) supports_over_clause = Database.sqlite_version_info >= (3, 25, 0)