Query optimization - The CROQUE project

• Main Authors: Andreas Heuer, Joachim Kröger
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1996
• Subjects: OQL; logical and physical algebra; optimization of object-oriented queries; Croque; DML
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.31.3205; http://wwwdb.informatik.uni-rostock.de/~jo/rib_18_1995.ps.gz

This paper describes parts of a concept for the evaluation and optimization of ODMGOQL queries. We present a logical object algebra for the internal representation of OQL queries. Algebraic expressions are also represented as query trees. Different optimization techniques are sketched: factorization...