Abstract
A major challenge for search data structures is type hierarchy indexing. In contrast to the situation in relational databases, any query in an OODB may refer either to one type or, implicitly, to a subhierarchy and therefore to a set of types. In this chapter, the specific requirements, the technical issues, and some selected data structure solutions in the context of type hierarchy queries are discussed.
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The quantifier !∃ is to be read as there exists exactly one
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© 1997 Springer Science+Business Media New York
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Mueck, T.A., Polaschek, M.L. (1997). Type Hierarchy Indexing. In: Index Data Structures in Object-Oriented Databases. Advances in Database Systems, vol 7. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-6213-9_4
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DOI: https://doi.org/10.1007/978-1-4615-6213-9_4
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-7849-5
Online ISBN: 978-1-4615-6213-9
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