Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom Lane wrote:
>> themselves. (I'd also be inclined to include the hash code in the
>> transmitted message, so that readers could more quickly ignore
>> uninteresting messages.)
> Doesn't seem worth it, and how would the user know their hash;
This is not the user's problem; it is the writing backend's
responsibility to compute and add the hash. Basically we trade off some
space to compute the hash code once at the writer not N times at all the
readers.
regards, tom lane