Re: Controlling changes in plpgsql variable resolution

Pavel Stehule wrote:
> 2009/10/20 Tom Lane <tgl@sss.pgh.pa.us>:
> > Merlin Moncure <mmoncure@gmail.com> writes:
> >> How about warning for release before making the big switch? ?The text
> >> cast change, while ultimately good, maybe could have been stretched
> >> out for a release or two...it was painful. ?I do though absolutely
> >> think that it was good in the end to not support a compatibility
> >> option in core.
> >
> > As long as we provide a backwards-compatible setting, I don't believe
> > this change will be a huge deal. ?The problem with the implicit-casts
> > business was that there was no reasonable way to provide a control
> > switch --- the catalog entries were either there or not :-(. ?So far
> > as I can tell at the moment, there won't be any large technical cost
> > to providing a backwards-compatible option for this plpgsql change.
> 
> I don't thing, so drop some implicit-casts was huge problem. Somebody
> could to use Peter's patch, that recreate missing casts.

True, but we should have had those compatibility pathes (Peter's patch)
ready before we released, and advertised them in the release notes.

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