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A gene-base DBMS | ||
| Journal of Al-Qadisiyah for Computer Science and Mathematics | ||
| Article 1, Volume 1, Issue 1, 2009, Pages 1-4 PDF (0 K) | ||
| Authors | ||
| Hanan A.and Wegdan A; ; Dr.Hadeel Noori | ||
| Abstract | ||
| The task of the query optimizer is to accept as input a tree of relational algebra operators and to produce a query execution plan. This plan specifies exactly which operations should be performed, in which order. Algebra space can express the solution space, whereas a good search algorithm can finding an optimal solution. In this work a genetic algorithm with two crossover strategies will be tested on a B+ tree sorted database example and nested loop join strategy. The results show that using M2S crossover with left-deep strategy will give better solutions. | ||
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