能够产生的可供选择的执行计划的数量取决于计划空间(Plan Space)的大小限制和SQL语句的语法。计划空间的大小限制了查询优化器能够产生的可供选择的执行计划的数量。
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parallel query execution plan space 并行查询执行计划空间
Plan 9 from Outer Space 九号行星外层空间计划 ; 外太空计划 ; 外星第九号计划
Green space plan 绿地规划
general space plan [航] 综合空间计划
Urban green space system plan 城市绿地系统规划
plan from outer space 外太空大阴谋
space exploration plan 太空探索计划
underground space plan 地下空间规划
Green space plan design 绿地规划设计
The living and dining areas are part of a bright open-plan space with windows on three sides and a brick fireplace in the living area.
起居和用餐区位于一片采光充裕的开放式空间内,三面有窗,起居区设有一座砖砌壁炉。
The large living room and adjoining sunroom form an open-plan space totaling nearly 750 square feet, with walls of windows facing the yard and pool.
大客厅和旁边的太阳房形成了一个开放式空间,共计近750平方英尺(约合70平方米),其落地窗面向院子和游泳池。
The lower-level apartment is an open-plan space with a kitchen, a wood stove and glass doors opening up to a patio.
低层公寓为开放式空间,设有一间厨房和一个柴炉,其玻璃门通向一座露台。
But Americans were hopeful. If the plan succeeded, it would be the greatest space act since manned flights began.
VOA: special.2009.06.24
The plan is for Orion to provide astronauts with a spacecraft that can link with the International Space Station.
VOA: special.2010.04.28
Next year, the Chinese plan to launch a small space laboratory to practice docking of spacecraft in orbit.
VOA: special.2010.04.28
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