ratchet

ratchet is a schema migration tool for Cloud Spanner.

Installation

Download the binary from GitHub Releases and drop it in your $PATH.

• Darwin / Mac
• Linux

Usage

You can use by following steps.

1. Initialize the schema for migration

$ ratchet init -p {your-project-id} -i {spanner-instance} -d {spanner-database}

Creating migration table...
Migration table has been created!!

This will create a table to manage migration.

2. Create migration files

$ ratchet new

New migration file has been created in migrations/2021-02-07_07-38-03_23229.sql

The above command makes a migration file for DDL. If you want to make files for DML or Partitioned-DML, please add --dml or --pdml opition.

3. Run migrations

$ ratchet run -p {your-project-id} -i {spanner-instance} -d {spanner-database}

Migration started.
running 2021-02-07_07-38-03_23229 ... done.
Migration completed!