加入收藏 | 设为首页 | 会员中心 | 我要投稿 我爱故事小小网_铜陵站长网 (http://www.0562zz.com/)- 视频终端、云渲染、应用安全、数据安全、安全管理!
当前位置: 首页 > 教程 > 正文

oracle SQL解析流程小结

发布时间:2021-12-07 20:45:10 所属栏目:教程 来源:互联网
导读:1 The syntax of the SQL statement is verified. SQL的语法检查 2 The data dictionary is searched to verify table and column definitions. 从数据字典检查表名和字段名 3 The data dictionary is searched to verify security privileges on relevant ob
1 The syntax of the SQL statement is verified.
 
SQL的语法检查
 
2 The data dictionary is searched to verify table and column definitions.
 
从数据字典检查表名和字段名
 
3 The data dictionary is searched to verify security privileges on relevant objects.
 
从数据字典中检查权限
 
4 Parse locks are acquired on the relevant objects.
 
解析相关对象的锁
 
5 The optimal execution plan is determined.
 
选在执行计划运行SQL
 
6 The statement is loaded into the shared SQL area (also known as the library cache) in the shared pool of the system global area (SGA).
 
执行后SQL语句放在SGA的SQL共享区

(编辑:我爱故事小小网_铜陵站长网)

【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容!

    热点阅读