在PostgreSQL中，创建数据库时实际上通过拷贝一个已有数据库进行工作的。在默认情况下，将拷贝名为template1的标准系统数据库。所以该数据库是创建新数据库的“模板”。如果为template1数据库增加对象，这些对象将被拷贝到后续创建的用户数据库中。这种行为允许对数据库中标准对象集合的进行修改。例如，如果把过程语言PL/Perl安装到template1中，那么在创建用户数据库后不需要额外....

文章 2025-01-17 来自：开发者社区

PolarDB PostgreSQL版：商业数据库替换与企业上云首选

PolarDB PostgreSQL版：商业数据库替换与企业上云首选内容介绍：一、PolarDB技术架构二、PolarDB弹性、性能、降本与多模特性更新三、商业数据库替换与上云解决方案与案例本次演讲将介绍PolarDB for PostgreSQL弹性、性能、成本、多模等方向上新的技术突破，包括Serverless...

文章 2024-11-28 来自：开发者社区

【赵渝强老师】PostgreSQL的数据库

PostgreSQL的逻辑存储结构主要是指数据库中的各种数据库对象，包括：数据库集群、数据库、表、索引、视图等等。所有数据库对象都有各自的对象标识符oid（object identifiers）,它是一个无符号的四字节整数，相关对象的oid都存放在相关的系统目录表中，比如数据库的oid和表的oid分别存放在pg_database,pg_class表中。下图展示了PostgreSQL数据库的逻辑存....

文章 2024-11-26 来自：开发者社区

【赵渝强老师】PostgreSQL的数据库集群

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