openGauss通过CStoreIndexScan算子进行向量化索引扫描。其实具体到索引上,比如btree索引,仍旧是沿用原有逻辑进行扫描,只不过将ItemPointerData存入VctorBatch中,然后将其再存入Batchsortstate进行排序,最后从排序结果中拿取VectorBatch。以此保证取出的ItemPointerData都是根据页号排序的,避免了heap页的随机读取。向量化索引扫描...
thrust::device_vector<int> A(3); thrust::device_vector<char> B(3); A[0] = 10; A[1] = 20; A[2] = 30; B[0] = 'x'; B[1] = 'y'; B[2] = 'z'; thrust::maximum< thrust::tuple<int, char> > binary_op; thrust::tuple<int, char> init = thrust::make_zip_iterator(...
1.1 一个项目入门 C++ 足以:CPlusPlusThings CPlusPlusThings 是国人开源一个 C++ 学习项目。它系统地将...
vector 数组 随机读改、尾部插入、尾部删除 O(1)头部插入、头部删除 O(n) 无序 可重复 支持随机访问 deque 双端队列 头尾插入、头尾删除 O(1) 无序 可重复 一个中央控制器 + 多个缓冲区,支持首尾快速增删,支持随机访问 forward_list 单向链表 插入、删除 O(1) 无序 可重复 不支持随机访问 list 双向链表...
c++ 疑难杂症(7) std::tuple c++ 疑难杂症(6) std::map c++ 疑难杂症(5) std::pair c++ 疑难杂症(4) std:vector c++ 疑难杂症(3) 模板特化 c++ 疑难杂症(2) std::move c++ 疑难杂症(1) std::thread 本站仅提供存储服务,所有内容均由用户发布,如发现有害或侵权内容,请点击举报。
vector 数组 随机读改、尾部插入、尾部删除 O(1)头部插入、头部删除 O(n) 无序 可重复 支持随机访问 deque 双端队列 头尾插入、头尾删除 O(1) 无序 可重复 一个中央控制器 + 多个缓冲区,支持首尾快速增删,支持随机访问 forward_list 单向链表 插入、删除 O(1) 无序 可重复 不支持随机访问 list 双向链表...
Error_2_The type or namespace name 'Vector2' could not be found (are you missing a using directive or an assembly reference?)_ Error_96_The type or namespace name 'Button' could not be found (are you missing a using directive or an assembly reference?)_ Error: An object reference is...
N4387 Improving pair And tuple VS 2015.2 14 N4389 bool_constant VS 2015 14 N4508 shared_mutex (Untimed) VS 2015.2 14 N4510 Supporting Incomplete Types In vector/list/forward_list VS 2013 14 N4562 Library Fundamentals: <algorithm> sample() VS 2017 15.0 N4562 Library...
N4387 Improving pair And tuple VS 2015.2 14 N4389 bool_constant VS 2015 14 N4508 shared_mutex (Untimed) VS 2015.2 14 N4510 Supporting Incomplete Types In vector/list/forward_list VS 2013 14 N4562 Library Fundamentals: <algorithm> sample() VS 2017 15.0 N4562 Library...
N4387 Improving pair And tuple VS 2015.2 14 N4389 bool_constant VS 2015 14 N4508 shared_mutex (Untimed) VS 2015.2 14 N4510 Supporting Incomplete Types In vector/list/forward_list VS 2013 14 N4562 Library Fundamentals: <algorithm> sample() VS 2017 15.0 N4562 Library...