SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function count (children 1)
     ExpressionList
    Function count (children 1)
     ExpressionList (children 1)
      Identifier n
    Function count (children 1)
     ExpressionList (children 1)
      Identifier s
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function cluster (children 1)
       ExpressionList (children 3)
        Literal \'test_cluster_two_shards\'
        Function currentDatabase (children 1)
         ExpressionList
        Identifier t
