所谓“多租户（Multi-Tenancy）”，本质上就是：一套系统，同时服务多个客户，并且每个客户的数据互相隔离。 很多团队第一次做 SaaS 系统时，对“多租户”这件事的理解都非常粗暴。 数据库实例爆炸、连接池失控、迁移困难、资源利用率极低。 更致命的是 ...

Enterprise stacks keep shifting to the cloud, yet local database setups refuse to disappear. Developers, students, and testers still need a reliable system running on their machines. PostgreSQL ...

Prototyping is my favorite part of programming. I like building new stuff and getting things working. It’s no surprise, then, that I am a big fan of MongoDB and NoSQL in general. Don’t get me wrong: I ...

如果不想这样，只能修改代码的所有表对象的字段类型和传参类型保证与postgres数据库的字段类型对应，但是有些依赖的框架底层自己操作数据库可能就无法修改源码了，只能修改数据库表字段类型了。 spring: datasource: # 修改驱动类 driver-class-name: org.postgresql.Driver ...

pgtt is a PostgreSQL extension to create, manage and use Oracle-style Global Temporary Tables and the others RDBMS. The objective of this extension it to provide the Global Temporary Table feature to ...

💰 Mentorship to six figure software engineer - https://calcur.tech/mentorship ⚙️ Backend Engineering Mind Map - https://calcur.tech/mindmap 💻 System Design Playlist - ...

PostgreSQL with the pgvector extension allows tables to be used as storage for vectors, each of which is saved as a row. It also allows any number of metadata columns to be added. In an enterprise ...

Our previous blog article, “The Part of PostgreSQL We Hate the Most,” discussed the problems caused by everyone’s favorite street-strength DBMS multi-version concurrency control (MVCC) implementation.