Name:
Anonymous
2009-04-07 21:00
┌───────────────────────────────┐
│ (or A B) │
│ ┌───┐ │
input │ ┌──►│ A │──────────────┐ │ output
stream of │ │ └───┘ ▼ │ stream of
frames │ │ ▲ ┌───────┐ │ frames
──────────┼──● │ │ merge ├─┼──────────►
│ │ │ └───────┘ │
│ │ │ ┌───┐ ▲ │
│ └─────┼────►│ B │──────┘ │
│ │ └───┘ │
│ │ ▲ │
│ │ │ │
│ └───●───┘ │
│ │ │
└────────────┼──────────────────┘
│
│
data base
Figure 4.6: The or combination of two queries is produced by operating on the stream of frames in parallel and merging the results.