# @packages/migrator

Database migration tool for moving data between PostgreSQL and SQLite.

## Setup

Install dependencies:
```bash
npm install
```

## Configuration

Edit `src/config.ts` directly to configure database settings:

```typescript
// PostgreSQL Configuration
export const postgresConfig = {
  connectionString: 'postgresql://postgres:postgres@localhost:5432/freshyo',
  ssl: false,
};

// SQLite Configuration
export const sqliteConfig = {
  filename: './data/migrated.db',
};

// Migration Settings
export const migrationConfig = {
  batchSize: 1000,              // Rows per batch
  truncateBeforeInsert: true,   // Clear tables before migration
  excludedTables: [],           // Tables to skip
  includedTables: [],           // Tables to include (empty = all)
};

// Logging
export const logConfig = {
  verbose: true,
  logFile: './migration.log',
};
```

## Usage

### PostgreSQL to SQLite

Migrate data from PostgreSQL to SQLite:

```bash
npm run migrate:pg-to-sqlite
```

### SQLite to PostgreSQL

Migrate data from SQLite to PostgreSQL:

```bash
npm run migrate:sqlite-to-pg
```

### Full Cycle (Testing)

Run both migrations in sequence:

```bash
npm run migrate:full-cycle
```

## Features

- ✅ Automatic schema conversion between PostgreSQL and SQLite
- ✅ Batch processing for large datasets
- ✅ Type mapping between databases
- ✅ JSON/array handling
- ✅ Configurable table filtering
- ✅ Progress logging
- ✅ Transaction support

## Notes

- Arrays and JSON data are stored as TEXT in SQLite and parsed back when migrating to PostgreSQL
- Date/timestamps are stored as ISO strings in SQLite
- Foreign key constraints are enabled in SQLite
- Edit `src/config.ts` to change any settings