1 files changed, 20 insertions, 0 deletions
diff --git a/lib/sqlalchemy/util/compat.py b/lib/sqlalchemy/util/compat.py
index 1eed2c3af..5b7a3eb9f 100644
--- a/lib/sqlalchemy/util/compat.py
+++ b/lib/sqlalchemy/util/compat.py
@@ -425,17 +425,37 @@ if py37:
     import dataclasses
 
     def dataclass_fields(cls):
+        """Return a sequence of all dataclasses.Field objects associated
+        with a class."""
+
         if dataclasses.is_dataclass(cls):
             return dataclasses.fields(cls)
         else:
             return []
 
+    def local_dataclass_fields(cls):
+        """Return a sequence of all dataclasses.Field objects associated with
+        a class, excluding those that originate from a superclass."""
+
+        if dataclasses.is_dataclass(cls):
+            super_fields = set()
+            for sup in cls.__bases__:
+                super_fields.update(dataclass_fields(sup))
+            return [
+                f for f in dataclasses.fields(cls) if f not in super_fields
+            ]
+        else:
+            return []
+
 
 else:
 
     def dataclass_fields(cls):
         return []
 
+    def local_dataclass_fields(cls):
+        return []
+
 
 def raise_from_cause(exception, exc_info=None):
     r"""legacy.  use raise\_()"""