Programming

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I accidentally removed the WHERE clause from my SQL query in a personal tool. Every row is now the same. I overwrote 206,000+ rows. I have no backup, I am stupid. (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/programming

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"UPDATE table_name SET w = $1, x = $2, z = $4 WHERE y = $3 RETURNING *",

does not do the same as

"UPDATE table_name SET w = $1, x = $2, y = $3, z = $4 RETURNING *",

It's 2 am and my mind blanked out the WHERE, and just wanted the numbers neatly in order of 1234.

idiot.

FML.

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[–] [email protected] 74 points 1 year ago (3 children)

Pro tip: transactions are your friend

[–] [email protected] 24 points 1 year ago

Completely agree, transactions are amazing for this kind of thing. In a previous team we also had a policy of always pairing if you need to do any db surgery in prod so you have a second pair of eyes + rubber duck to explain what you're doing.

[–] [email protected] 2 points 1 year ago (1 children)

They are - until you leave them open and go home....

[–] [email protected] 4 points 1 year ago

Temporarily locked overnight >>> broken stuff in prod

[–] [email protected] 1 points 1 year ago

This is the way.