SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Function array (alias x) (children 1)
     ExpressionList
    Function CAST (alias y) (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal \'Array(Array(Array(Tuple(UInt64, String))))\'
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier y
