d4170df40a
The extensions table defined two columns (id and priority) as primary key autoincrement columns. However only one is allowed when defining the primary key. This patch removes the autoincrement attribute from the priority column since it does not need to be as such and really should not have been on there in the first place. This patch also removes 'context', 'exten', and 'priority' from the primary key index and creates a new combined unique contraint index on them. ASTERISK-26183 #close Change-Id: Ib9c712c612a4d7ec1edb0dcb77f1bae0905a470b
Asterisk Database Manager
Asterisk includes optional database integration for a variety of features. The purpose of this effort is to assist in managing the database schema for Asterisk database integration.
This is implemented as a set of repositories that contain database schema migrations, using Alembic. The existing repositories include:
config- Tables used for Asterisk realtime configurationvoicemail- Tables used forODBC_STOARGEof voicemail messages
Alembic uses SQLAlchemy, which has support for many databases.
IMPORTANT NOTE: This is brand new and the initial migrations are still subject to change. Only use this for testing purposes for now.
Example Usage
First, create an ini file that contains database connection details. For help with connection string details, see the SQLAlchemy docs.
$ cp config.ini.sample config.ini
... edit config.ini and change sqlalchemy.url ...
Next, bring the database up to date with the current schema.
$ alembic -c config.ini upgrade head
In the future, as additional database migrations are added, you can run alembic again to migrate the existing tables to the latest schema.
$ alembic -c config.ini upgrade head
The migrations support both upgrading and downgrading. You could go all the way back to where you started with no tables by downgrading back to the base revision.
$ alembic -c config.ini downgrade base
base and head are special revisions. You can refer to specific revisions
to upgrade or downgrade to, as well.
$ alembic -c config.ini upgrade 4da0c5f79a9c
Offline Mode
If you would like to just generate the SQL statements that would have been executed, you can use alembic's offline mode.
$ alembic -c config.ini upgrade head --sql
Adding Database Migrations
The best way to learn about how to add additional database migrations is to refer to the Alembic documentation.