add max scope depth

hsheth2 · Jul 29, 2024 · 0e5553a · 0e5553a
1 parent be92ea0
commit 0e5553a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/sqlglot/optimizer/scope.py b/sqlglot/optimizer/scope.py
@@ -14,6 +14,8 @@
 
 TRAVERSABLES = (exp.Query, exp.DDL, exp.DML)
 
+MAX_SCOPE_DEPTH = 200
+
 
 class ScopeType(Enum):
     ROOT = auto()
@@ -468,6 +470,8 @@ def traverse(self):
                     scope.subquery_scopes,
                 )
             )
+            if len(result) > MAX_SCOPE_DEPTH:
+                raise OptimizeError("Scope depth limit exceeded")
 
         yield from reversed(result)