James Coleman <jtc331@gmail.com> writes:
> On Thu, Jun 25, 2020 at 12:33 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> I think the right way to think about this is that we are building
>> an output data structure according to a schema that should be fixed
>> for any particular plan shape. If event X happened zero times in
>> a given execution, but it could have happened in a different execution
>> of the same plan, then we should print X with a zero count. If X
>> could not happen period in this plan, we should omit X's entry.
> Do we print zeroes for memory usage when all sorts ended up spilling
> to disk then?
I did not claim that the pre-existing code adheres to this model
completely faithfully ;-). But we ought to have a clear mental
picture of what it is we're trying to achieve. If you don't like
the above design, propose a different one.
regards, tom lane