Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 02/19/2011 11:07 PM, Tom Lane wrote:
>> However, it occurs to me that as long as we're passing the function the
>> ExplainState, it has what it needs to add arbitrary EXPLAIN result
> If we allow the invention of new explain states we'll never be able to
> publish an authoritative schema definition of the data. That's not
> necessarily an argument against doing it, just something to be aware of.
> Maybe we don't care about having EXPLAIN XML output validated.
I thought one of the principal arguments for outputting XML/etc formats
was exactly that we'd be able to add fields without breaking readers.
If that's not the case, why did we bother?
regards, tom lane
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