public void Migrate(IEnumerable <IStep> migrationSteps, DatabaseVersion currentVersion, long?targetVersionNumber, IScriptRunner scriptRunner, string schema, string tablespace)
{
if (_databaseMetadataProvider.SchemaExists(schema))
{
if (_versionRespository.GetCurrentVersion(schema).IsNotNull())
{
var orderByDescending = migrationSteps.Select(m => m.BackwardScript).Where(m => m.IsNotNull()).OrderByDescending(m => m.Version);
DowngradeDatabase(orderByDescending, currentVersion, targetVersionNumber, scriptRunner, schema);
}
else
{
Output.Warn("Database schema '{0}' exists, but there are no recorded database versions. Database was most likely not terminated.".FormatWith(schema));
}
}
}
