The Prunable trait declares which rows are expendable and does nothing until something runs the command. The pruning hook loads and deletes row by row, which is correct…
A full restore of a 180 GB database to fix one table is hours of downtime for a problem affecting forty thousand rows. The transportable tablespace route is…
The optimiser assumes an even distribution for a non-indexed column, which is wrong for a status column where one value is ninety per cent of the rows. The…
An expression in a WHERE clause cannot use an index, and a generated column moves the expression somewhere indexable. The automatic substitution is the good part and requires…
There is no merge and no notification — the database copy wins entirely, and the only signal is a “Customized” label in an editor screen nobody opens. Deleting…
A deleted_at column means every query filters on it forever, and the rows stay in the index, in the buffer pool and in the backup. PostgreSQL’s partial index…