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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 9 months ago* (last edited 9 months ago) by drekly@lemmy.world to c/programming@programming.dev

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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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[–] towerful@programming.dev 52 points 9 months ago* (last edited 9 months ago) (2 children)

Postgres has a useful extension, pg_safeupdate

https://github.com/eradman/pg-safeupdate

It helps reduce these possibilities by requiring a where clause for updates or deletes.
I guess if you get into a habit of adding where 1=1 to the end of your SQL, it kind of defeats the purpose.

[–] myersguy@lemmy.simpl.website 26 points 9 months ago (1 children)

MySQL (and by extension, MariaDB) has an even better option:

mysql --i-am-a-dummy

[–] tau@lemmings.world 5 points 9 months ago

Amazing! These are going in my.conf ASAP.

[–] fmstrat@lemmy.nowsci.com 5 points 9 months ago

Transactions help more, IMO. The 1=1 becomes a real habit.