james.maesandClaude Fable 5.2
2837f4152a
The PostgreSQL 17 journal qualification refused every call on Amazon Aurora
PostgreSQL, which reports full_page_writes=off and does not expose the
parameter in its cluster parameter group.
- The settings query gains an eleventh column,
to_regprocedure('aurora_version()') IS NOT NULL, which is true on Aurora,
false on stock PostgreSQL 17 and never raises.
- full_page_writes=off is accepted only when that column is true. Stock
PostgreSQL with full_page_writes=off is still refused, and synchronous_commit,
fsync, recovery, isolation, time zone and lock timeout are unchanged on Aurora.
- The decision is the pure function tornPagesPrevented, covered by an always-on
unit test. The opt-in real PostgreSQL 17 suite simulates Aurora with a
function named aurora_version() and full_page_writes=off on the server.
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>