When comes time to get the schema of a table, I see there is the ability to pass a parameter to the ExecuteReader() method. This is one example:

oDataReader = oCommand.ExecuteReader(CommandBehavior.KeyInfo Or CommandBehavior.SchemaOnly)

So far, I wasn't including a parameter. If I only want to the get the schema, should I use use the CommandBehavior.SchemaOnly. And, what is the use of those two parameters?