SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 2)
      Literal \'median\'
      Function array (children 1)
       ExpressionList (children 1)
        Function toDecimal128OrZero (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal UInt64_2
