Temp tables

Hi all,

 

Can someone tell me what the difference is in a plpgsql function between dropping a temp table at the end of a function and not dropping the temp tables.

 

What other tables does it have an effect on?

 

It appears there is some overhead when the drop is being executed.

 

Is there some simple doco I can read to clue me up on the process?

 

Thanks

 

Andrew