A constraint added for documentation, which then rejected eleven thousand rows from a supplier feed. The constraint caught the absurd case and not the plausible one, which is…
A failover procedure written in 2023 and executed for the first time on a Saturday in January. A runbook that has never been executed is a hypothesis, and…
A constraint added not for integrity, which was already sound, but because the relationship was undocumented anywhere else. A schema is the most-read document in an application and…
A query that improved by a factor of twenty after a major version upgrade, examined rather than accepted. Understanding why something got faster is worth the ten minutes…
A configuration file carried forward since 2018, containing a variable the new version refuses to start with. A refusal to start is the correct severity for an unknown…
An 8.4 container image, an application that could not connect, and a plugin that was disabled by default rather than removed. The plugin can still be loaded with…