2 files changed, 11 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py
index 735a125d7..6d1174d20 100644
--- a/lib/sqlalchemy/sql/elements.py
+++ b/lib/sqlalchemy/sql/elements.py
@@ -3808,6 +3808,12 @@ class FunctionFilter(ColumnElement):
             rows=rows,
         )
 
+    def self_group(self, against=None):
+        if operators.is_precedent(operators.filter_op, against):
+            return Grouping(self)
+        else:
+            return self
+
     @util.memoized_property
     def type(self):
         return self.func.type
diff --git a/lib/sqlalchemy/sql/operators.py b/lib/sqlalchemy/sql/operators.py
index b8bbb4525..4a1a0dcd4 100644
--- a/lib/sqlalchemy/sql/operators.py
+++ b/lib/sqlalchemy/sql/operators.py
@@ -1345,6 +1345,10 @@ def empty_notin_op(a, b):
     raise NotImplementedError()
 
 
+def filter_op(a, b):
+    raise NotImplementedError()
+
+
 def concat_op(a, b):
     return a.concat(b)
 
@@ -1448,6 +1452,7 @@ _PRECEDENCE = {
     add: 7,
     sub: 7,
     concat_op: 6,
+    filter_op: 6,
     match_op: 5,
     notmatch_op: 5,
     ilike_op: 5,