Production runs DB_BACKEND=pg, but the message_hidden table (#18) and
pinned_at/pinned_by columns (#13) were only added to the SQLite migrations in
db.js — never to schema.pg.sql. So thread/conversations/pinned queries hit a
missing relation/column and 500'd, which surfaced as "chat history removed"
(no data was ever deleted — the reads just errored).
pg.js init() runs schema.pg.sql on every boot. Added the message_hidden table
and, because CREATE TABLE IF NOT EXISTS can't add columns to the existing
messages table, idempotent ALTER TABLE ... ADD COLUMN IF NOT EXISTS for
pinned_at/pinned_by. Restores all chat history and re-enables pin + delete-for-me.
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