fix(postgres): accept full_page_writes = off on Amazon Aurora PostgreSQL only (release/0.4) #10

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james.maes merged 1 commits from fix/aurora-full-page-writes-0.4 into release/0.4 2026-11-10 15:31:18 +00:00

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Author	SHA1	Message	Date
james.maesandClaude Fable 5.2	3eb120a823	fix(postgres): accept full_page_writes = off on Amazon Aurora PostgreSQL only ... RecordFilesPostgres refused every Amazon Aurora PostgreSQL database: Aurora reports full_page_writes = off (measured on engine 17.9) and the parameter is not in the cluster parameter group, so it cannot be changed. Its storage layer does not write torn pages, so the protection that setting gives stock PostgreSQL is not needed there. The settings query now carries a twelfth column, to_regprocedure('aurora_version()') IS NOT NULL, which is true on Aurora and false on stock PostgreSQL without raising. full_page_writes = off is accepted only when that column is true. Stock PostgreSQL with full_page_writes = off is still refused, and fsync, synchronous_commit, the writable primary, version, UTC, READ COMMITTED, the lock_timeout bound and every owner-table check are unchanged on both. Tests: PostgresDurabilityRuleTest (pure rule, every build) and PostgresAuroraQualificationTest (opt-in, real PostgreSQL 17, Aurora simulated by a test-only aurora_version() function and ALTER SYSTEM full_page_writes). Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>	2026-11-10 09:11:47 -06:00