Well at least we got a backup, right?
Right???
this post was submitted on 06 Nov 2023
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It last ran a week ago and we technically haven't tested it. Just our hot replicas which also just deleted all that data.
And of course by now every downstream system replicated AND CACHED that data.
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Backup? What is this backup you speak of?
This is what we in the industry refer to as a “big oof.”
I thing the technical term for this is an RGE.
(Resume Generating Event)
But it’s only, like, a handful of rows 🙃
Must be a technical term.
For everyone's sanity, please restrict access to the prod DB to like two people. No company wants that to happen to them, and no developer wants to do that.
Me applying for any database access ever: “read only. I do not want write. READ ONLY.”
Just a funny story. All of our devs and even BAs used to have prod access. We all knew this was a bad idea and put in a process of hiring a DBA.
I think in the first two weeks the DBA screwed up prod twice. I can't remember the first mess up but the second he had a lock on the database and then went to lunch.
We eventually hired two awesome DBAs to replace that one but oh boy.
Imagine being hired to help prevent people from fucking something up, only to fuck that thing up in your first week—not once, but twice. You’d think after the first time it wouldn’t happen again…
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8388409 = 2^23 - 199
I may have noticed this on a certain other aggregator site once upon a time, but I'm still none the wiser as to why.
199 rows kind of makes sense for whatever a legitimate query might have been, but if you're going to make up a number, why 2^23? Why subtract? Am I metaphorically barking up the wrong tree?
Is this merely a mistyping of 8388608 and it was supposed to be ±1 row? Still the wrong (B-)tree?
WHY DO I CARE
Are you Ramanujam reborn or a nerd who put every number they found on wolfram alpha?
In a place for programmer humour, you've got to expect there's at least one person who knows their powers of two. (Though I am missing a few these days).
As for considering me to be Ramanujan reborn, if there's any of Srinivasa in here, he's not been given a full deck to work with this time around and that's not very karmic of whichever deity or deities sent him back.
I know up to like 2^16 or maybe 2^17 while sufficiently caffeinated. Memorizing up to, or beyond, 2^23 is nerd award worthy.
I know that 2^20 is something more that a million because is the maximum number of rows excel can handle.
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Ramanujan reborn - the main protagonist from the Wheel of Maths books.
It's a good way to wake yourself up in the morning
Doctors HATE this one simple trick! Lose up to 100% of MyChart data - and KEEP it off!
Can help reduce blood pressure, high cholesterol, weight, height, gender, name and more to NULL! Wake up feeling NULL and NULL!
Ah reminds me of the time (back in the LAMP days) when I tried to apply this complicated equation that sales had come up with to our inventory database. This was one of those "just have the junior run it at midnight" type of shops. Anyway, I made a mistake and ended up exactly halving all inventory prices on production. See OP's picture for my face.
In retrospect, I'm thankful for that memory.
Ive had one of those moments. Where you fuck up so bad that your emotions wrap all the way around from panic, through fear, confusion, rage, dread and back to neutral, and you go 'Hmm..."
Yeah that's a good way to put it. It's like so close to the thing you were dreading, that it's a sort of sick relief when it actually happens.
It's like...
This is now the correct database.
Rollback.
I don't understand environments that don't wrap things in transactions by default.
Especially since an update or delete without a where clause is considered valid.
I'm a data engineer that occasionally has to work in sql server, I use dbeaver and have our prod servers default to auto-wrap in transactions and I have to push a button and confirm I know it's prod before it commits changes there, it's great and has saved me when I accidentally had a script switch servers. For the sandbox server I don't have that on because the changes there don't matter except for testing, and we can always remake the thing from scratch in a few hours. I haven't had an oppsie yet and I hope to keep that streak
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No transaction to rollback
Just hit Ctrl+Z to Undo
You can also do this by forgetting a WHERE clause. I know this because I ruined a production database in my early years.
Always write your where before your insert, kids.
Always start every command with EXPLAIN and don't remove it until you've run it
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That's what backups are for.
Checking the backups... Ah yes, the backup done in August 2017.
Hello boss, I broke the company. I'll see myself out
If you don't have apt backups, that is a failure of the process, not yours.
Plot twist, they were also the one responsible for developing the backup process.
You should take it upon yourself to make regular backups in case you fuck up really bad. I had an intern that deleted everything on its fifth day, luckily l was automatically making backups two times a day, so it was fine.
Why would an intern be allowed anywhere near prod DB? Do you not have lower environments?
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This is missing NSFW tag!
Legit have nightmares about this.
I actually screwed up twice on dev environment. Luckily the second case was salvageable without using data from an old backup(I wasn't given one that time) and I managed to sweep it up fast.
I started testing my queries super carefully after the first incident, but I was too tired once that I forgot to restrict the update scope for testing and screwed up again.
'content' :)
Whenever SQL databases come up, I always think of this video from one of the greatest 'content' creators in history.
Looks like little bobby tables is at it again. (edit: for reference: https://xkcd.com/327/)
Edit #2: For lemmy app users: https://xkcd.com/327
And thanks to @Gestrid@lemmy.ca for the correction.
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oopsie daisy moment
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