# Phase 7: Database Updates

## Agent Assignment
**Primary Agent:** infra-agent
**Duration:** 15 minutes

## Prerequisites
- Phase 5 (Network Simplification) must be complete

## Objectives
1. Verify database schema has no tenant_id columns
2. Ensure all tables use user_id isolation only
3. Verify migrations don't reference tenants

## Step-by-Step Instructions

### Step 1: Connect to Database
```bash
docker compose exec mvp-postgres psql -U postgres -d motovaultpro
```

### Step 2: Verify No tenant_id Columns
```sql
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_schema = 'public'
  AND column_name = 'tenant_id';
```
**Expected:** 0 rows

### Step 3: Verify user_id Columns Exist
```sql
SELECT table_name
FROM information_schema.columns
WHERE table_schema = 'public'
  AND column_name = 'user_id';
```
**Expected:** vehicles, fuel_logs, maintenance_logs, documents, etc.

### Step 4: Check Migrations
```bash
grep -r "tenant" backend/src/_system/migrations/
# Expected: 0 results (no tenant references)
```

### Step 5: Verify Platform Schema (if needed)
If mvp-platform uses separate schema:
```sql
CREATE SCHEMA IF NOT EXISTS vehicles_platform;
-- Platform service will initialize its tables
```

## Validation Criteria
- [ ] No tenant_id columns in application database
- [ ] All tables have user_id for isolation
- [ ] Migrations have no tenant references
- [ ] Database accessible from mvp-backend and mvp-platform

## Update EXECUTION-STATE.json
```json
{
  "phases": {"7": {"status": "completed", "validation_passed": true}}
}
```