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.. _alembic.ddl.toplevel:
=============
DDL Internals
=============
These are some of the constructs used to generate migration
instructions. The APIs here build off of the :class:`sqlalchemy.schema.DDLElement`
and :ref:`sqlalchemy.ext.compiler_toplevel` systems.
For programmatic usage of Alembic's migration directives, the easiest
route is to use the higher level functions given by :ref:`alembic.operations.toplevel`.
.. automodule:: alembic.ddl
:members:
:undoc-members:
.. automodule:: alembic.ddl.base
:members:
:undoc-members:
.. automodule:: alembic.ddl.impl
:members:
:undoc-members:
MySQL
=============
.. automodule:: alembic.ddl.mysql
:members:
:undoc-members:
:show-inheritance:
MS-SQL
=============
.. automodule:: alembic.ddl.mssql
:members:
:undoc-members:
:show-inheritance:
Postgresql
=============
.. automodule:: alembic.ddl.postgresql
:members:
:undoc-members:
:show-inheritance:
SQLite
=============
.. automodule:: alembic.ddl.sqlite
:members:
:undoc-members:
:show-inheritance:
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