Fix func.coalesce when used with @hybrid_property

diff --git a/lib/sqlalchemy/sql/functions.py b/lib/sqlalchemy/sql/functions.py
index d4aafd362592339db9aeaba3fcd6417f4c1074f9..10ae5b391f41c7af1c2d483ad3b2d0d727502e22 100644 (file)
--- a/lib/sqlalchemy/sql/functions.py
+++ b/lib/sqlalchemy/sql/functions.py
@@ -1076,7 +1076,7 @@ class _FunctionGenerator:
         @overload
         def coalesce(
             self,
-            col: _ColumnExpressionArgument[_T],
+            col: _ColumnExpressionArgument[Optional[_T]],
             *args: _ColumnExpressionOrLiteralArgument[Any],
             **kwargs: Any,
         ) -> coalesce[_T]: ...
@@ -1084,14 +1084,14 @@ class _FunctionGenerator:
         @overload
         def coalesce(
             self,
-            col: _T,
+            col: Optional[_T],
             *args: _ColumnExpressionOrLiteralArgument[Any],
             **kwargs: Any,
         ) -> coalesce[_T]: ...
 
         def coalesce(
             self,
-            col: _ColumnExpressionOrLiteralArgument[_T],
+            col: _ColumnExpressionOrLiteralArgument[Optional[_T]],
             *args: _ColumnExpressionOrLiteralArgument[Any],
             **kwargs: Any,
         ) -> coalesce[_T]: ...