Setting a boolean is, quite often, an important event you want to keep track of. (Specifically, when it is a flag indicating an event took place, eg, once it's been set it is rarely if ever unset.) Of course it isn't universally applicable to every boolean column; nothing is. Of course you need to understand your schema and the problem you're solving. That doesn't make it mindless or make it any less valuable. It is a good pattern which does lead to good things. If it is mindless, your suggestion of tracking every change in an audit table, and the created_at and updated_at fields you approved of, are equally mindless.

As it stands, I feel I've articulated straightforward and realistic advantages of using timestamps as booleans. But I haven't heard from you why I shouldn't.

▲ setr 5 days ago | parent [-]

The original premise, from TFA, is

    Another is the Twitter-optimized “you’re a terrible engineer if you ever store booleans in a database” clever trick

That is, universal application. My point is: doing that, for the most part, will not the track the things you actually want, because bools are not the driving decision maker on value of tracking (and many things that need to be tracked will not be bools). It may accidentally capture useful tracking, but it’s more by accident than anything else. Thus, universal application is clearly wrong, and TFA is right to apply it conditionally.

You appear to agree on all of these points. I’m not arguing that, should you need to timetrack a bool, bool—>timestamp is a bad way to do it. As I’ve said, the universal application of it is only stated because it’s free to do. But being free doesn’t make it useful, and since you agree on that as well, I don’t know if there’s any argument actually occurring here.

	▲	maxbond 4 days ago \| parent [-]
		I think we agree more than we disagree on how to go about designing a schema, but that my narrow disagreement is that I think a.) timestamps and enums are better choices than booleans most of the time (without judging anyone who uses booleans to be a "terrible engineer", it's not malpractice) and b.) that's a legitimate trick of the trade rather than something "mindless". I would agree that throwing a table together based on Twitter vibes without actually designing it will only work like a stuck clock, but I think that goes without saying. I kinda disregard opinions attributed to nebulous Twitter posters and not specific people. I think when you conflate people's opinions together like that you reduce their position to a caricature. If you poll that group of people almost all of them will have a more nuanced opinion.