The query processor could not start the necessary thread resources for parallel query execution.
查询处理器未能为并行查询的执行启动必要的线程资源。
And it implements parallel query processing through query localization based on data partitioning and replication.
利用数据划分和复制将查询本地化从而实现并行查询。
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。
The search space of parallel query execution plan is exponential complexity. How to prune the search space efficiently is the key problem of parallel query optimization.
并行查询执行计划的搜索空间里指数级增长，如何高效地裁剪搜索空间是并行查询优化的关键所在。
The search space of parallel query execution plan is exponential complexity. How to prune the search space efficiently is the key problem of parallel query optimization.
并行查询执行计划的搜索空间里指数级增长，如何高效地裁剪搜索空间是并行查询优化的关键所在。
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