| Object Traversals |
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| Ÿ | Even with lazy
reads, object traversal is not always |
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| ideal |
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| – | To find a phone
number for the manufacturer of a product |
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| that a
particular customer bought, may do several queries: |
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| Ÿ | Get customer in
question |
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| Ÿ | Get orders for
customer |
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| Ÿ | Get parts for
order |
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| Ÿ | Get manufacturer
for part |
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| Ÿ | Get address for
manufacturer |
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| – | Very natural
object traversal results in 5 queries to get |
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| data that can be
done in 1 |
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