Choosing Access Methods (RelOps)
Performed for each node in RA expression tree ...
Inputs:
- a single RA operation (σ, π, ⋈)
- information about file organisation, data distribution, ...
- list of operations available in the database engine
Output:
- specific DBMS operation to implement this RA operation
|
![[prev]](icon/prev.gif){kind=icon}
![[next]](icon/next.gif){kind=icon}