@packages/migrator

Database migration tool for moving data between PostgreSQL and SQLite.

Setup

Install dependencies:

npm install

Configuration

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

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

// 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:

npm run migrate:pg-to-sqlite

SQLite to PostgreSQL

Migrate data from SQLite to PostgreSQL:

npm run migrate:sqlite-to-pg

Full Cycle (Testing)

Run both migrations in sequence:

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

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