optimization plan 优化方案; 方案优化; 优化规划; 优化设计 收藏 and Plan optimization 方案优化 收藏 Optimization of conditions 优化条件; 条件优化 收藏 .
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repairing task and plan optimization 维修任务与计划的优化
plan and optimization 规划与优化
plan optimization and evaluation 方案优化与评价
trajectory plan control and optimization 轨迹规划控制及优化
The following examples are demonstrative of optimization profiles usage in 3 categories, namely, general optimization, query rewrite, and plan optimization.
下面的例子演示了优化概要文件在3类情况下的使用，即常规优化、查询重写和计划优化。
The optimizer considers star join optimization when appropriate and decides on star join plan based on cost considerations in order to come up with best execution plan for a star join query.
为了实现星型连接查询的最佳执行计划，优化器在适当的时候会考虑星型连接优化，并根据成本因素来决定星型连接计划。
For the exceptional situations where the optimizer cannot choose an optimal query execution plan, DB2 has added features such as the SELECTIVITY clause and optimization guidelines.
对于优化器不能选择最佳查询执行计划的例外情况，DB 2已经增加了诸如selectivity子句和优化指南之类的特性。
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