SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function toDecimal32 (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'42.42\'
      Literal UInt64_4
    Function toDecimal32 (alias y) (children 1)
     ExpressionList (children 2)
      Function log (children 1)
       ExpressionList (children 1)
        Identifier x
      Literal UInt64_4
    Function round (children 1)
     ExpressionList (children 2)
      Function exp (children 1)
       ExpressionList (children 1)
        Identifier y
      Literal UInt64_6