SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function toFloat32 (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Literal \'Bool\'
      Literal \'UInt8\'
