Add a SQlite backend. One test passes!

django/db/backends/sqlite3/base.py

@@ -18,6 +18,7 @@ from django.db.backends.signals import connection_created
 from django.db.backends.sqlite3.client import DatabaseClient
 from django.db.backends.sqlite3.creation import DatabaseCreation
 from django.db.backends.sqlite3.introspection import DatabaseIntrospection
+from django.db.backends.sqlite3.schema import DatabaseSchemaEditor
 from django.utils.dateparse import parse_date, parse_datetime, parse_time
 from django.utils.functional import cached_property
 from django.utils.safestring import SafeString
@@ -336,6 +337,10 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         if self.settings_dict['NAME'] != ":memory:":
             BaseDatabaseWrapper.close(self)
 
+    def schema_editor(self):
+        "Returns a new instance of this backend's SchemaEditor"
+        return DatabaseSchemaEditor(self)
+
 FORMAT_QMARK_REGEX = re.compile(r'(?<!%)%s')
 
 class SQLiteCursorWrapper(Database.Cursor):

django/db/backends/sqlite3/schema.py

@@ -0,0 +1,6 @@
+from django.db.backends.schema import BaseDatabaseSchemaEditor
+
+
+class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
+
+    sql_delete_table = "DROP TABLE %(table)s"

tests/modeltests/schema/tests.py

@@ -44,18 +44,18 @@ class SchemaTests(TestCase):
             # Remove any M2M tables first
             for field in model._meta.local_many_to_many:
                 try:
-                    cursor.execute("DROP TABLE %s CASCADE" % (
-                        connection.ops.quote_name(field.rel.through._meta.db_table),
-                    ))
+                    cursor.execute(connection.schema_editor().sql_delete_table % {
+                        "table": connection.ops.quote_name(field.rel.through._meta.db_table),
+                    })
                 except DatabaseError:
                     connection.rollback()
                 else:
                     connection.commit()
             # Then remove the main tables
             try:
-                cursor.execute("DROP TABLE %s CASCADE" % (
-                    connection.ops.quote_name(model._meta.db_table),
-                ))
+                cursor.execute(connection.schema_editor().sql_delete_table % {
+                    "table": connection.ops.quote_name(model._meta.db_table),
+                })
             except DatabaseError:
                 connection.rollback()
             else: