diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index c88d50b28a..221e48aebe 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -130,6 +130,7 @@ Yii Framework 2 Change Log
 - Bug #14773: Fixed `yii\widgets\ActiveField::$options` does not support 'class' option in array format (klimov-paul)
 - Bug #14902: Fixed PHP notice in `yii\web\MultipartFormDataParser` (olimsaidov)
 - Bug #14921: Fixed bug with replacing numeric keys in `yii\helpers\Url::current()` (rob006)
+- Bug #15122: Fixed bug with sql error if params has expression in `yii\db\Command::getRawSql()` (hiscaler)
 - Enh #4479: Implemented REST filters (klimov-paul)
 - Enh #4495:  Added closure support in `yii\i18n\Formatter` (developeruz)
 - Enh #5786: Allowed to use custom constructors in ActiveRecord-based classes (ElisDN, klimov-paul)
diff --git a/framework/db/Command.php b/framework/db/Command.php
index 437421812d..5f1b3a3fee 100644
--- a/framework/db/Command.php
+++ b/framework/db/Command.php
@@ -211,7 +211,7 @@ class Command extends Component
                 $params[$name] = ($value ? 'TRUE' : 'FALSE');
             } elseif ($value === null) {
                 $params[$name] = 'NULL';
-            } elseif (!is_object($value) && !is_resource($value)) {
+            } elseif ((!is_object($value) && !is_resource($value)) || $value instanceof Expression) {
                 $params[$name] = $value;
             }
         }