SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function toDecimal128 (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'42.42\'
      Literal UInt64_4
    Function round (children 1)
     ExpressionList (children 2)
      Function lgamma (children 1)
       ExpressionList (children 1)
        Identifier x
      Literal UInt64_6
    Function round (children 1)
     ExpressionList (children 2)
      Function divide (children 1)
       ExpressionList (children 2)
        Function tgamma (children 1)
         ExpressionList (children 1)
          Identifier x
        Literal Float64_1e50
      Literal UInt64_6