Bruce Momjian <pgman@candle.pha.pa.us> writes:
> meaning if ecpg references PGnotify, should it have a new major number
> too,
No, because PGnotify is *not part of ecpg's API*.
The ecpg library, when compiled, will show a dependency on the new major
number for libpq. That does not mean that applications linked to ecpg
need to be recompiled. They don't (unless they depend directly on libpq
too).
regards, tom lane