SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 2)
      Literal \'medianExact\'
      Function array (children 1)
       ExpressionList (children 1)
        Function toDecimal128OrNull (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal UInt64_2