ABAP Dynamic HINTS ?

Hello application development guys,

the DSAG (a german SAP user group) is presenting a speech called "Performance optimization with dynamic hints".

As far as i know is that we can use "static" hints for database queries (hard coded in ABAP)... but i don't know any possibility to generate the hints "dynamically".

Are there any other cases in ABAP where HINTs are used or is what does it mean "optimization with dynamic hints" ?

I can't imagine that database hints are generated dynamically....

Thanks and Regards

Stefan