postgressomethi

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2 yıl öncediscuss

I always thought there should be a two-arg overload of new, so you could write new(bool, true) or new(int, 20). Would solve the problem without any trickery.

postgressomethi

2 yıl öncediscuss

A Nintendo Switch is a non-hardware decryption system?

postgressomethi

2 yıl öncediscuss

Could "effectively controls access" be attacked here? The purpose of the hardware is not to control access.

postgressomethi

2 yıl öncediscuss

> You might think adding a UNIQUE index would cause the "losing" xact to get constraint errors, but instead both xacts succeed and no longer have a race condition.

This is not true. What happens is that the (sub)transaction that loses the race to the index is aborted:

  =# INSERT INTO foo (bar) (SELECT max(bar) + 1 FROM foo);
  ERROR:  duplicate key value violates unique constraint "foo_bar_idx"
  DETAIL:  Key (bar)=(2) already exists.

postgressomethi

3 yıl öncediscuss

> Imagine booting your computer and having to give an email to login offline.

As much as I hate what modern Windows has become, this is not actually true. If you know the correct sequence of clicks you can avoid this. Not defending this bullshit, though.

postgressomethi

3 yıl öncediscuss

Ah, now I see I responded to the wrong message.

postgressomethi

3 yıl öncediscuss

I'm sorry, I wasn't being clear. Any column meaning "this row is to be ignored for most applications" is an annoying pattern.

postgressomethi

3 yıl öncediscuss

While that's kind of convenient in a lot of ways, it also makes querying the database really annoying, since you have to remember to add the filtering to every single query or you're screwed. Personally, I wish there was a database-implementation-acknowledged "deleted" flag, which could even expose a "history table"-like interface.

postgressomethi

3 yıl öncediscuss

Sequences kind of have the same issue, because you don't know if a gap is because of a rollback or an uncommitted transaction. Though with some logic you can do a pretty good job at this with sequences. And then you're not in the realm of "simple" anymore, at all.

postgressomethi

3 yıl öncediscuss

Polling an updated_at column is not robust in its most simple form, as transactions are not guaranteed to commit in that order.