Make database downgrade works

Fixes bug #854905

Use sqlalchemy reflection whenever possible:
    http://sqlalchemy-migrate.readthedocs.org/en/latest/versioning.html

Work around sqlalchemy-migrate sqlite 'bool column not deletable' issue:
    http://code.google.com/p/sqlalchemy-migrate/issues/detail?id=143
    Add following sql scripts for sqlite:
        002_sqlite_downgrade.sql
        015_sqlite_downgrade.sql
        033_sqlite_downgrade.sql
        050_sqlite_downgrade.sql
        068_sqlite_downgrade.sql

Work around sqlalchemy-migrate sqlite 'table with foreign key column not
deletable' issue:
    http://code.google.com/p/sqlalchemy-migrate/issues/detail?id=94
    Add following sql scripts for sqlite:
        003_sqlite_downgrade.sql
        006_sqlite_downgrade.sql
        007_sqlite_downgrade.sql
        012_sqlite_upgrade.sql
        013_sqlite_downgrade.sql
        020_sqlite_downgrade.sql
        030_sqlite_downgrade.sql
        038_sqlite_downgrade.sql
        042_sqlite_downgrade.sql
        053_sqlite_downgrade.sql
        067_sqlite_downgrade.sql

Work around sqlalchemy-migrate 'migrate drops engine reference' issue:
    http://code.google.com/p/sqlalchemy-migrate/issues/detail?id=72

Add following sql scripts for long primary key to work with utf-8
mysql table:
    072_mysql_upgrade.sql

Add following sql scripts for postgresql:
    002_postgresql_downgrade.sql

Add snake walk test cases for database migration based on glance migration
test.

Change-Id: Ib454ecb4662bbf47736c1b12d9a4f969f180ceb6

0 files changed, 0 insertions, 0 deletions