Hi Tom,
On 05/25/2009 08:04 PM, Tom Raney wrote:
So, why not put ALL interesting data in the EXPLAIN XML feed? I'm not
suggesting for this discussion that we include discarded plans, but that
we include every piece of data that may be of interest to folks building
connecting tools. The parsers can pick and choose what they use easily
and, because the feed isn't positional, won't break when addition data
is added. A GUC parameter could govern the data included in this variant
of EXPLAIN, but even that seems unnecessary. This approach will allow
the standard EXPLAIN to evolve in whatever way pleases the humans
without interfering with the machines.
Well, there is the problem Robert Haas described - some stats may be too
expensive to gather (like the io-stats) for regular use, but still be
quite usefull.
Andres
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