migrate - SQLAlchemy Migrate (schema change management)

Author:Evan Rosson
Maintainer:Domen Kožar <domenNO@SPAMdev.si>
Maintainer:Jan Dittberner <jan.dittbernerNO@SPAMgooglemail.com>
Issues:http://code.google.com/p/sqlalchemy-migrate/issues/list
Source Code:http://code.google.com/p/sqlalchemy-migrate/
CI Tool:http://jenkins.gnuviech-server.de/job/sqlalchemy-migrate-all/
Generated:May 06, 2014
License:MIT
Version:0.7.3.dev

Overview

Inspired by Ruby on Rails’ migrations, SQLAlchemy Migrate provides a way to deal with database schema changes in SQLAlchemy projects.

Migrate was started as part of Google’s Summer of Code by Evan Rosson, mentored by Jonathan LaCour.

The project was taken over by a small group of volunteers when Evan had no free time for the project. It is now hosted as a Google Code project. During the hosting change the project was renamed to SQLAlchemy Migrate.

Currently, sqlalchemy-migrate supports Python versions from 2.6 to 2.7. SQLAlchemy Migrate 0.7.2 supports SQLAlchemy 0.6.x and 0.7.x branches.

Support for Python 2.4 and 2.5 as well as SQLAlchemy 0.5.x has been dropped after sqlalchemy-migrate 0.7.1.

Warning

Version 0.6 broke backward compatibility, please read changelog for more info.

Download and Development

Dialect support

Operation / Dialect sqlite postgres mysql oracle firebird mssql
ALTER TABLE RENAME TABLE yes yes yes yes no not supported
ALTER TABLE RENAME COLUMN yes (workaround) [5] yes yes yes yes not supported
ALTER TABLE ADD COLUMN yes (workaround) [6] yes yes yes yes not supported
ALTER TABLE DROP COLUMN yes (workaround) [5] yes yes yes yes not supported
ALTER TABLE ALTER COLUMN yes (workaround) [5] yes yes yes (with limitations) [7] yes [8] not supported
ALTER TABLE ADD CONSTRAINT partial (workaround) [5] yes yes yes yes not supported
ALTER TABLE DROP CONSTRAINT partial (workaround) [5] yes yes yes yes not supported
RENAME INDEX no yes no yes yes not supported
[5](1, 2, 3, 4, 5) Table is renamed to temporary table, new table is created followed by INSERT statements.
[6]See http://www.sqlite.org/lang_altertable.html for more information. In cases not supported my sqlite, table is renamed to temporary table, new table is created followed by INSERT statements.
[7]You can not change datatype or rename column if table has NOT NULL data, see http://blogs.x2line.com/al/archive/2005/08/30/1231.aspx for more information.
[8]Changing nullable is not supported

Tutorials

List of useful tutorials:

Indices and tables