>On 9 Oct 2017 13:13, "Durumdara" <durumdara(at)gmail(dot)com> wrote:
>
> "cached plan must not change result type"
As far as I remember, this kind of errors you can get from a prepared
statement execution, when the result type of it was changed (as in your
case by adding a column to a table that provides the data for a prepared
statement).