"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.
In MSSQL, you can do a BEGIN TRAN before your UPDATE statement.
Then if the number of affected rows is not about what you'd expect, doing a ROLLBACK would undo the changes.
If the number of affected rows did look about right, doing a COMMIT would make the changes permanent.
Yup, exact tip I was gonna write!
I have them commented out and highlight the COMMIT when I'm ready.