Switch default PostgreSQL from 17 to 18 #2356
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PG 18 provides the native uuidv7() function, making time-ordered UUIDs the out-of-the-box experience without needing IHP_POSTGRES_VERSION=18. - Pin postgresql_18 in devenv service, test environments, and NixOS module - Update PGVersion.hs default from 17 to 18 - Add upgrade instructions to UPGRADE.md - Update database guide documentation Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
uuidv7()function, making time-ordered UUIDs the out-of-the-box experiencepostgresql_18in devenv service, nix test environments, and NixOS deployment modulePGVersion.hsdefault souuidv7()is used without needingIHP_POSTGRES_VERSION=18UPGRADE.mdTest plan
defaultUuidFunctionreturns"uuidv7"with no env var setpostgresql_17referencesnix flake check --impurepasses (CI)🤖 Generated with Claude Code