>>>Here is a tip I learned at WhilFest this week to close a table without getting error. Instead of this code:

>>>if used('mytable')
>>>   use in mytable
>>>endif

>>>Someone showed this:

Use in select('mytable')

>This relies on the undocumented behaviour of SELECT() - that it returns 0 if the alias is not found, rather than throwing an error. IMO it's an example of "cute" code vs. code that is self-documenting and that doesn't rely on undocumented features.
>
>In this case we souldn't use select('mytable') at all because it's return value isn't documented. :)

The value *is* documented if "mytable" is USED().