empty arrays fix

Author: ierusalim

src/ClickHouseSQLParser.php

@@ -867,13 +867,15 @@ public function parseCreateTableSql($create_full)
             return $eng_arr;
         }
 
-        $names = $parse_fields = [];
         if (!empty($create_fields)) {
             $fields_arr = $this->parseCreateFields($create_fields);
             if (\is_array($fields_arr)) {
                 \extract($fields_arr);
             }
         }
+        if (!isset($names)) {
+            $names = $parse_fields = [];
+        }
         return \array_merge(\compact(
             'create_fn',     //str First part of sql request (CREATE ...)
             'table',         //str