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fix(upload-journal): accept Amazon Aurora PostgreSQL (full_page_writes=off) #65

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james.maes merged 1 commits from fix/aurora-full-page-writes-develop into develop 2026-11-10 15:27:46 +00:00
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james.maesandClaude Fable 5.2 2837f4152a fix(upload-journal): accept Amazon Aurora PostgreSQL (full_page_writes=off)
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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>
 2026-11-09 20:26:14 -06:00