public override void Perform(SchemaChanges changes, IOutput output)
{
// This step covers both unique keys (including primary keys) and non-unique indexes
foreach (var current in UniqueIndexType.AllFrom(changes.Current))
{
if (!UniqueIndexType.IndexHasChanged(changes, current))
{
continue;
}
changes.Remove(changes.SchemaDriver.GetDropUniqueConstraintSql(current.ParentName, current.Name), current);
}
foreach (var current in NonUniqueIndexType.AllFrom(changes.Current))
{
if (!NonUniqueIndexType.IndexHasChanged(changes, current))
{
continue;
}
changes.Remove(changes.SchemaDriver.GetDropIndexSql(current.ParentName, current.Name), current);
}
}
