This requirement was not documented anywhere and it can thus be a surprising error to hit. But it's actually not needed for this to be an error, as long as we send the correct RowDescription there does not have to be a problem for clients when the result types or column counts change.
What if a client has *cached* an old version of RowDescription
and the server changed it to something new and sent resultdata
with the new RowDescription. Will the client still be able to work
expectly?
I don't hope my concern is right since I didn't go through any of
the drivers in detail, but I hope my concern is expressed correctly.
