Avoiding the N+1 problem List recent tweets List users and all their tweets Using prefetch Avoiding the N+1 problem The N+1 problem refers to a situation where an applicatio...

Nacos Contributing Flow 1. Fork Alibaba/Nacos repository to your Github. 2. Clone your fork Nacos repository to local. 3. Add Alibaba/Nacos repository as upstream repo. 4. Choos...

Background JDBC ODBC HTTP Server Project structure Status Implemented Not implemented Clients Microsoft .NET driver for Apache Phoenix Query Server Apache Phoenix/Avatica S...

架构 部署图 Job 提交 生成 Job 逻辑执行图 生成 Job 物理执行图 分配 Task Job 接收 Task 运行 Shuffle read Discussion 架构 前三章从 job 的角度介绍了用户写的 program 如何一步步地被分解和执行。这一章主要从架构的角度来讨论 master，worker，driver ...

声明游标变量 使用动态 SQL 定义游标变量 使用游标变量循环获取记录集的每行记录 与游标一样，游标变量也是一个指向多行查询结果集合中当前数据行的指针。但与游标不同的是，游标变量是动态的，而游标是静态的。游标只能与指定的查询相连，即固定指向一个查询的内存处理区域，而游标变量则可与不同的查询语句相连，它可以指向不同查询语句的内存处理区域（但不能同时指向...

Hashes Hashes 📄️ HDELLearn how to use Redis HDEL command to remove a field from a hash map. Great for data maintenance operations. 📄️ HEXISTSLearn how to use Redis HEXISTS com...

Hashes Hashes 📄️ HDELLearn how to use Redis HDEL command to remove a field from a hash map. Great for data maintenance operations. 📄️ HEXISTSLearn how to use Redis HEXISTS com...

Location API Location flag Extended usage Fetch API Worker modules Only use if necessary Location API Deno supports the location global from the web. Please read on. Lo...

Location API Location flag Extended usage Fetch API Worker modules Only use if necessary Location API Deno supports the location global from the web. Please read on. Lo...

Location API Location flag Extended usage Fetch API Worker modules Only use if necessary Location API Deno supports the location global from the web. Please read on. Lo...