SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function less (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Function materialize (children 1)
           ExpressionList (children 1)
            Literal \'1\'
          Literal UInt64_0
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal \'2\'
          Literal UInt64_0
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal UInt64_0
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal \'2\'
          Literal UInt64_0