The application of materialised object-oriented views in object-relational data warehousing systems is promising. In this paper we propose a novel technique for the materialisation of method results in object-oriented views, called hierarchical materialisation. When an object used to materialise the result of method m is updated, then m has to be recomputed. This recomputation can use unaffected intermediate materialised results of methods called from m, thus reducing a recomputation time. The hierarchical materialisation technique was implemented and evaluated by a number of experiments concerning methods without input arguments as well as methods with input arguments. The results showed that hierarchical materialisation reduces method recomputation time. Moreover, materialising methods with input arguments of narrow discrete domains introduces only a small time overhead.
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机译：物化的面向对象视图在对象关系数据仓库系统中的应用是有前途的。在本文中，我们提出了一种新的技术，用于在面向对象的视图中实现方法结果，称为分层实现。当更新用于实现方法 m 的结果的对象时，必须重新计算 m 。此重新计算可以使用从 m 调用的方法的不受影响的中间物化结果，从而减少重新计算时间。通过关于无输入自变量的方法以及具有输入自变量的方法的大量实验，实施并评估了层次化物化技术。结果表明，分层实现减少了方法重新计算的时间。此外，具有狭窄离散域输入参数的实现方法仅会引入很小的时间开销。
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