diff --git a/server/conn_test.go b/server/conn_test.go
index 0a2a8c428dcb6..1278d24e9a742 100644
--- a/server/conn_test.go
+++ b/server/conn_test.go
@@ -756,7 +756,6 @@ func TestConnExecutionTimeout(t *testing.T) {
 
 	err = cc.handleQuery(context.Background(), "select /*+ MAX_EXECUTION_TIME(100)*/  * FROM testTable2 WHERE  SLEEP(1);")
 	require.NoError(t, err)
-
 	tk.MustExec("set @@max_execution_time = 500;")
 
 	err = cc.handleQuery(context.Background(), "alter table testTable2 add index idx(age);")
diff --git a/util/hint/hint_processor.go b/util/hint/hint_processor.go
index 7164390cdad69..ca2799a7f6edf 100644
--- a/util/hint/hint_processor.go
+++ b/util/hint/hint_processor.go
@@ -91,6 +91,18 @@ func ExtractTableHintsFromStmtNode(node ast.Node, sctx sessionctx.Context) []*as
 		return x.TableHints
 	case *ast.ExplainStmt:
 		return ExtractTableHintsFromStmtNode(x.Stmt, sctx)
+	case *ast.SetOprStmt:
+		var result []*ast.TableOptimizerHint
+		if x.SelectList == nil {
+			return nil
+		}
+		for _, s := range x.SelectList.Selects {
+			tmp := ExtractTableHintsFromStmtNode(s, sctx)
+			if len(tmp) != 0 {
+				result = append(result, tmp...)
+			}
+		}
+		return result
 	default:
 		return nil
 	}