"TJ O'Donnell" <tjo@acm.org> writes:
> So, my question is: Is there some hard and fast rule about when
> one needs to recompile c-language functions from one pg version to
> another? Always for a major version change? minor? I suppose
> the wise thing is to recompile with ANY pg version change.
You should definitely expect to recompile for a major version change.
You can generally get away without it in minor version updates, although
once in a while we will change internal APIs in a minor update if it's
necessary to fix a bug.
regards, tom lane