Re: WIP: explain analyze with 'rows' but not timing

Excerpts from Tomas Vondra's message of vie dic 23 11:45:40 -0300 2011:

> One thing I'm wondering about is that the InstrumentOptions are not
> exclusive - INSTRUMENT_TIMER means 'collect timing and row counts' while
> INSTRUMENT_ROWS means 'collect row counts'. Wouldn't it be better to
> redefine the INSTRUMENT_TIMER so that it collects just timing info. I.e.
> to get the current behaviour, you'd have to do this
>
>    instrument_options |= (INSTRUMENT_TIMER | INSTRUMENT_ROWS)
>
> It's quite trivial change in explain.c, the problem I have with that is
> that it might break extensions.

No, maybe add INSTRUMENT_TIMER_ONLY and then define INSTRUMENT_TIMER as
setting both.  That way you don't break compatibility.

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Álvaro Herrera <alvherre@commandprompt.com>
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