| Demuth, B. Geppert, A. Gorchs, T. Algebraic query optimisation in the CoOMS structurally object-oriented database system, Query Processing for Advanced Database Systems, eds. Freytag, Maier and Vossen, Morgan Kaufman, 1994. |
....the equivalences inv 1 5 is analogous. The approach of [Clu92] retains a separation of DML and programming language; thus, the possibility of non termination or infinite data structures are not considered. Several other groups have introduced object algebras and strategies for their optimisation [Dem94, Lie92, Sha89, Sto91, Van91] with analogous equivalences to those we propose here. In general these algebras are either computationally incomplete or support optimisations for only a subset of their operators. Also, some provide only limited facilities for optimising user defined data types; while others allow few algebraic ....
Demuth, B. Geppert, A. Gorchs, T. Algebraic query optimisation in the CoOMS structurally object-oriented database system, in Query Processing for Advanced Database Systems, eds. Freytag, Maier and Vossen, Morgan Kaufman, 1994.
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Demuth, B. Geppert, A. Gorchs, T. Algebraic query optimisation in the CoOMS structurally object-oriented database system, Query Processing for Advanced Database Systems, eds. Freytag, Maier and Vossen, Morgan Kaufman, 1994.
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