![[assets/ex_functionscan.png|256]] - **Description**: Executes a table-returning function and scans its output. - **Performance**: Depends on function complexity. - **Factors**: Function logic, number of tuples. - **Cost**: `function cost + cpu_tuple_cost * number of tuples` - ![[assets/ex_table_func_scan.svg|200x200]] - **Operates on**: [[Structures/Table]] - **Workloads**: - [[Workloads/LWLock]] - [[Workloads/Sub/BufferContent]] - [[Workloads/Activity]] - background process engagement varies by function