@Aggregate aware function is maily used for speed up the 
business objects process.

An aggregate table is summary table that dba  build to execute 
querys faster.@aggregate _aware is an function in bo which
takes advantage of aggregate table when ever possible else
it redirects to original fact table.

syntax:
@aggregate_aware(sum(smallest_table),sum(medium
table),sum(biggest_table));

here smallest table is aggregate table because data is
aggregated by various dimensions.and big table is fact table.