From 9fdb0e667fbeef9e13750afc4be90a29618c292e Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Wed, 17 Mar 2021 21:40:26 +0300
Subject: [PATCH] Add comment.

---
 src/Interpreters/ActionsDAG.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Interpreters/ActionsDAG.cpp b/src/Interpreters/ActionsDAG.cpp
index e5ae2dcfcf9..94d9b72b8e9 100644
--- a/src/Interpreters/ActionsDAG.cpp
+++ b/src/Interpreters/ActionsDAG.cpp
@@ -1424,7 +1424,8 @@ ActionsDAGPtr ActionsDAG::cloneActionsForConjunction(std::vector<Node *> conjunc
         }
     }
 
-
+    /// Actions must have the same inputs as in all_inputs list.
+    /// See comment to cloneActionsForFilterPushDown.
     for (const auto & col : all_inputs)
     {
         Node * input;