MAGETWO-45413: Reports feature Refresh Lifetime Statistics is broken

Author: slopukhov

app/code/Magento/Reports/Model/ResourceModel/Report/AbstractReport.php

@@ -384,6 +384,10 @@ public function getStoreTZOffsetQuery(
         if (null === $from) {
             $selectOldest = $connection->select()->from($table, ["MIN({$column})"]);
             $from = $connection->fetchOne($selectOldest);
+            if (null === $from) {
+                $date = new \DateTime();
+                $from = $date->format('Y-m-d H:i:s');
+            }
         }
 
         $periods = $this->_getTZOffsetTransitions(