this post was submitted on 11 Oct 2023
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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] 92 points 1 year ago (2 children)

This doesn’t help you but may help others. I always run my updates and deletes as selects first, validate the results are what I want including their number and then change the select to delete, update, whatever

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

I learned this one very early on in my career as a physical security engineer working with access control databases. You only do it to one customer ever. 🤷‍♂️

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

Same. I think it’s good to have a healthy fear/respect for updates and deletes and treat them as radioactive. Luckily by simply writing it as a select first we can easily see how many and which records will be affected.