SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function mapConcat (children 1)
     ExpressionList (children 2)
      Function map (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'0.1\'
          Literal \'Float64\'
        Literal UInt64_4
      Function map (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'0.2\'
          Literal \'Float64\'
        Literal UInt64_5