The experiments prove that th~ rewriter rules are effective and genetc algorithm has obvious advantage while processing multi-join query.
结果表明，本文提出的重写规则是很有效的，遗传算法在处理多连接查询时具有明显的优越性。
参考来源 - 关系数据库查询优化技术的研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
Multiway spatial join is the spatial join query which concern several spatial relations.
空间多路连接是涉及多个空间关系的连接查询。
The multi-join query optimization is the critical problem of parallel query optimization in parallel database system.
多连接查询优化是并行数据库系统的核心问题。
If specified, it can only take the value 'TRUE' to indicate that the given table must be the first table accessed in a join query.
如果指定了的话，它将只接受“TRUE”值，表示给定表必须是连接查询中进行访问的第一个表。
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