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Skeema is a tool for managing MySQL tables and schema changes in a declarative fashion using pure SQL. It provides a CLI tool allowing you to:

• Export CREATE TABLE statements to the filesystem, for tracking in a repo (git, hg, svn, etc)
• Diff changes in the schema repo against live DBs to automatically generate DDL
• Manage multiple environments (e.g. dev, staging, prod) and keep them in sync with ease
• Configure use of online schema change tools, such as pt-online-schema-change, for performing ALTERs
• Convert non-online migrations from frameworks like Rails or Django into online schema changes in production

Skeema supports a pull-request-based workflow for schema change submission, review, and execution. This permits your team to manage schema changes in exactly the same way as you manage code changes.

Pre-built skeema binaries for Linux and macOS can be downloaded from the releases page.

Compiling from scratch requires the Go programming language toolchain, version 1.9 or higher.

To download, build from master, and install (or upgrade) Skeema, run:

go get -u github.com/skeema/skeema

• Getting started: usage examples and screencasts
• Recommended workflow
• Configuration how-to
• Options reference
• Requirements
• Frequently asked questions

Skeema is generally available, having reached the v1 release milestone in July 2018. Prior to that, it was in public beta since October 2016.

The skeema binary is supported on macOS and Linux. For now, it cannot be compiled on Windows.

Tagged releases are tested against the following databases, all running on Linux:

• MySQL 5.5, 5.6, 5.7, 8.0
• Percona Server 5.6, 5.7
• MariaDB 10.1, 10.2, 10.3

Outside of a tagged release, every commit to the master branch is automatically tested against MySQL 5.6 and 5.7.

A few uncommon MySQL features -- such as partitioning, fulltext indexes, spatial types, virtual columns -- are not yet supported. Skeema is able to create or drop tables using these features, but not alter them. The output of skeema diff and skeema push clearly displays when this is the case. You may still make such alters directly/manually (outside of Skeema), and then update the corresponding CREATE TABLE files via skeema pull.

Created and maintained by @evanelias.

Additional contributions by:

• @tomkrouper
• @efixler
• @chrisjpalmer

Copyright 2018 Skeema LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.