I messed up carelessly in production. Learnt how SQL queries bite you in the ass when it knows you are under pressure.

Was hosting an online quiz kinda thing during my college techfest. Tens of thousands of people participating.

Using MySQL as database and thousands of queries were being executed. Everyone were pretty excited as the event just opened up.

None of the teams could solve one particular level. Turns out the solution was wrong and was asked by the organisers to change the solution for that particular level. Usual stuff, right?

Was too lazy to open up the web UI for the back office and so, straight ahead logged in to the MySQL server and ran the UPDATE query on the table consisting of the solutions.

It had been a couple of hours and the organisers came to me with a weird problem. There were no changes in the scoreboard for the last two hours. Everyone were stuck wherever they were. Weird, right?

I then realized.

Fk.

In that dreaded query, I had only run

UPDATE 'qa' SET answer = 'something'

leaving out the where clause, specifying the question to update, like

WHERE qno=13

As a result, solutions to all the questions were updated to the same answer. After hastily fixing everything back, I had the dreaded conversation.

Org: What was the problem?

Me: It was the cache.

Org: Damn thing. Always messes up.

Me: *sheepishly* yeah

Probably the most embarrassing moment in my life, wrt coding 😑