fix typing error

dantownsend · dantownsend · commit 9dbf582d2e92 · 2021-02-13T13:35:36.000Z
diff --git a/piccolo/query/methods/alter.py b/piccolo/query/methods/alter.py
@@ -92,7 +92,7 @@ def querystring(self) -> QueryString:
 
 
 @dataclass
-class SetColumnType:
+class SetColumnType(AlterStatement):
     __slots__ = ("old_column", "new_column")
 
     old_column: Column
