Re: Hide 'Execution time' in EXPLAIN (COSTS OFF)

On June 3, 2014 9:40:27 PM CEST, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>On Tue, Jun 3, 2014 at 3:08 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Andres Freund <andres(at)2ndquadrant(dot)com> writes:
>>> In 9.4. COSTS OFF for EXPLAIN prevents 'Planning time' to be
>>> printed. Should we perhaps do the same for 'Execution time'? That'd
>make
>>> it possible to use EXPLAIN (ANALYZE, COSTS OFF, TIMING OFF) in
>>> regression tests.
>>
>>> Currently the output for that is:
>>> postgres=# EXPLAIN (ANALYZE, TIMING OFF, COSTS OFF) SELECT 1;
>>> QUERY PLAN
>>> --------------------------------
>>> Result (actual rows=1 loops=1)
>>> Total runtime: 0.035 ms
>>> (2 rows)
>>
>>> Leaving off the total runtime doesn't seem bad to me.
>>
>> It seems a little weird to call it a "cost" ... but maybe that
>> ship has sailed given how we're treating the planning-time item.
>
>Maybe we could make it be controlled by TIMING. Seems like it fits
>well-enough there.

Don't think that fits well - TIMING imo is about reducing the timing overhead. But the server side total time is still interesting. I only thought about tacking it onto COST because that already is pretty much tailored for regression test usage. C.F. disabling the planning time.

Andres

--
Please excuse brevity and formatting - I am writing this on my mobile phone.

Andres Freund http://www.2ndQuadrant.com/
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