The Supabase GitHub integration re-runs migrations on every push.
The original 001_initial_schema.sql used plain CREATE TABLE without
IF NOT EXISTS, so it failed with "relation 'profiles' already exists"
after the first successful run.
Changes:
- CREATE TABLE -> CREATE TABLE IF NOT EXISTS (all 16 tables)
- CREATE INDEX -> CREATE INDEX IF NOT EXISTS
- DROP POLICY IF EXISTS before each CREATE POLICY
(Postgres has no CREATE POLICY IF NOT EXISTS)
- DROP TRIGGER IF EXISTS before each CREATE TRIGGER
- Wrapped ALTER PUBLICATION in DO block that checks pg_publication_tables
- handle_new_user() trigger now uses SECURITY DEFINER, SET search_path,
EXCEPTION handler, and owner=postgres to properly bypass RLS on the
profiles INSERT during signup (fixes "Database error saving new user")
The migration is now safe to re-run any number of times.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
