SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier _shard_num
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function clusterAllReplicas (children 1)
       ExpressionList (children 1)
        Literal \'test_cluster_one_shard_two_replicas\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier _shard_num
