目录PostgreSQL有两种生成uuid的方法。可以先通过sql查看是否已安装扩展函数，和可以安装的扩展函数1，安装 pgcrypto 扩展函数2，安装 uuid-ossp 扩展函数postgresql有两种生成uuid的方法。
In C (or C++ for that matter), pointers are special if they have the value zero: I am adviced to set pointers to zero after freeing their memory, because it means freeing the pointer again isn\'t dang
加载中,请稍侯......