- db/pg.js: the pg backend (prepare/exec/tx/init) — ?→$N translation, BIGINT parsed
as Number (matches sqlite; else expires_at<Date.now() compares string<number),
transactions on one pooled client, init() applies schema.pg.sql. Same interface as
db/sqlite.js, so repos are unchanged.
- repos.js: the ~7 SQLite-only queries rewritten to run on BOTH engines —
audit.add @named→positional; email lookups COLLATE NOCASE→LOWER()=LOWER();
INSERT OR IGNORE→ON CONFLICT DO NOTHING (addMember/poll vote/favorite);
mergeInto's UPDATE OR IGNORE→UPDATE…WHERE NOT EXISTS/NOT IN and INSERT OR
REPLACE→ON CONFLICT DO UPDATE. Re-validated on sqlite: db-smoke still 22/22.
- server.js: boot now `await db.init()` before listening (pg creates tables; sqlite
no-op), so the first request can't hit a missing table.
- db/migrate-sqlite-to-pg.js: one-shot row copy in FK order (bulk insert, TRUNCATE
first so re-runnable). audit_log id left to PG's identity.
- package.json: add pg ^8.13.1.
Next: validate DB_BACKEND=pg smoke against a real Postgres on the server, then merge.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
server/dbx.js selects a backend by DB_BACKEND (default sqlite; pg added at cutover).
server/db/sqlite.js wraps the synchronous node:sqlite instance in the async
interface repos will call — prepare(sql).{get,all,run}, exec(sql), tx(fn), init().
Results come back as resolved Promises so identical repo code runs on synchronous
SQLite (dev/test) and asynchronous Postgres (prod).
tx() gives multi-statement atomicity that stays correct on both engines (sqlite is
single-connection; the pg backend will run it on one pooled client) — needed for the
account-merge transaction in repos.
Verified: get/all/run/tx all work end-to-end; confirmed no code reads
.changes/.lastInsertRowid, so the repo conversion is purely sync->Promise. Unwired —
nothing requires dbx.js yet; prod path untouched.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
server/db/schema.pg.sql — the full Postgres DDL, every column defined up front (no
ALTER-ordering fragility). SQLite→PG type mapping documented in-file (epoch-ms
INTEGER→BIGINT, 0/1 flags→SMALLINT kept numeric so app code is unchanged, sizes→
BIGINT, audit rowid→GENERATED IDENTITY). Mirrors the three existing FKs and adds a
new idx_messages_attachment (the /files auth scan we cached earlier becomes a keyed
lookup).
Validated against a throwaway Postgres 16: loads with no errors, 24 tables + 44
indexes created. Unwired — nothing uses it yet; the SQLite path is untouched.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Sravan