From cb384f542de7c131b5ee7cb81ce172bd963e646c Mon Sep 17 00:00:00 2001
From: Alexander Makarov <sam@rmcreative.ru>
Date: Wed, 12 Jun 2019 00:09:31 +0300
Subject: [PATCH] Add upgrade note for #17344

---
 framework/UPGRADE.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/framework/UPGRADE.md b/framework/UPGRADE.md
index e1b86a9139..a4342f5eb2 100644
--- a/framework/UPGRADE.md
+++ b/framework/UPGRADE.md
@@ -51,6 +51,12 @@ if you want to upgrade from version A to version C and there is
 version B between A and C, you need to follow the instructions
 for both A and B.
 
+Upgrade from Yii 2.0.20
+-----------------------
+
+* `yii\db\Query::select()` and `addSelect()` now normalize the columns when saving them to `$this->select`, so code
+  that works directly with that property directly may need to be modified.
+
 Upgrade from Yii 2.0.16
 -----------------------