Jeff Janes <jeff.janes@xxxxxxxxx> writes: > Is there a reason to not just elog the HJDEBUG stuff? Yes --- it'd be expensive (a "no op" elog is far from free) and useless to ~ 99.999% of users. Almost all the conditionally-compiled debug support in the PG executor is legacy leftovers from Berkeley days. If it were useful more often than once in a blue moon, we probably would have made it more easily reachable long ago. I'm a bit surprised we haven't just ripped it out, TBH. When I find myself needing extra debug output, it's almost never the case that any of that old code does what I need. There might be a case for changing it all to print to stderr not stdout, so that it plays more nicely with elog/ereport output when you do have it turned on, though. regards, tom lane
