Hi, On 2019-05-07 18:34:11 +0200, David Fetter wrote: > On Tue, May 07, 2019 at 08:41:47AM -0700, Andres Freund wrote: > > On 2019-05-07 09:30:47 +0200, David Fetter wrote: > > > It can get a little tedious turning on (or off) all the boolean > > > options to EXPLAIN, so please find attached a shortcut. > > > > I'm not convinced this is a good idea - it seems likely that we'll > > add conflicting options at some point, and then this will just be a > > pain in the neck. > > I already left out FORMAT for a similar reason, namely that it's not a > boolean, so it's not part of flipping on (or off) all the switches.
Which is already somewhat hard to explain. Imagine if we had CPU_PROFILE = on (which'd be *extremely* useful). Would you want that to be switched on automatically? How about RECORD_IO_TRACE? How about DISTINCT_BUFFERS which'd be like BUFFERS except that we'd track how many different buffers are accessed using HLL or such? Would also be extremely useful. > Are you seeing a point in the future where there'd be both mutually > exclusive boolean options and no principled reason to choose among > them? If so, what might it look like? Yes. CPU_PROFILE_PERF, CPU_PROFILE_VTUNE. And lots more. Greetings, Andres Freund
