Robert Haas <robertmhaas@gmail.com> writes:
> On Tue, May 15, 2018 at 3:45 PM, legrand legrand
> <legrand_legrand@hotmail.com> wrote:
>> Would there be some functional or performances reasons to prefer jumbling to
>> hashing normalized plan text?
> Basically, I would be nervous about the idea of an EXPLAIN output
> that's required to reflect all and only the plan details that should
> be jumbled. The "normalized" option to EXPLAIN which you mentioned
> upthread doesn't exist today...
Indeed, and if we did write it, I think it would largely consist of
throwing away info that a jumbling mechanism could ignore far more easily.
Not to mention that we'd have to expend the cycles to emit a text
representation that we didn't actually have use for. It sounds like a
complete loser both in terms of coding effort and runtime performance.
regards, tom lane