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Type inheritance applies to named row types only. You
can use inheritance to group named row types into a type hierarchy in
which each subtype inherits the representation (data fields) and
the behavior (UDRs, aggregates, and operators) of
the supertype under which it is defined. A type hierarchy provides
the following advantages:
- It encourages modular implementation of your data model.
- It ensures consistent reuse of schema components.
- It ensures that no data fields are accidentally left out.
- It allows a type to inherit UDRs that
are defined on another data type.
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