#11523: Fix Filter Customer Report Review

 - Integration test updated
 - Added backport for MAGETWO-53296 to 2.1, as it blocked the flow

Author: ishakhsuvarov

app/code/Magento/Reports/Model/ResourceModel/Review/Customer/Collection.php

@@ -83,7 +83,7 @@ protected function _joinCustomers()
         $this->getSelect()->reset(
             \Magento\Framework\DB\Select::COLUMNS
         )->joinInner(
-            ['customer' => $connection->getTableName('customer_entity')],
+            ['customer' => $this->getTable('customer_entity')],
             'customer.entity_id = detail.customer_id',
             []
         )->columns(
@@ -99,6 +99,21 @@ protected function _joinCustomers()
         return $this;
     }
 
+    /**
+     * {@inheritdoc}
+     *
+     * Additional processing of 'customer_name' field is required, as it is a concat field, which can not be aliased.
+     * @see _joinCustomers
+     */
+    public function addFieldToFilter($field, $condition = null)
+    {
+        if ($field === 'customer_name') {
+            $field = $this->getConnection()->getConcatSql(['customer.firstname', 'customer.lastname'], ' ');
+        }
+
+        return parent::addFieldToFilter($field, $condition);
+    }
+
     /**
      * Get select count sql
      *

dev/tests/integration/testsuite/Magento/Reports/Model/ResourceModel/Review/Customer/CollectionTest.php

@@ -30,7 +30,7 @@ protected function setUp()
      */
     public function testSelectCountSql()
     {
-        $this->collection->addFieldToFilter('customer_name', ['like' => '%john%']);
+        $this->collection->addFieldToFilter('customer_name', ['like' => '%John%'])->getItems();
         $this->assertEquals(1, $this->collection->getSize());
     }
 }