oracle SQL 解析 步骤，爱好oracle的朋友可以参考下，了解工作流程。
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
版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。
如发现本站有涉嫌抄袭侵权/违法违规的内容， 请发送邮件至 chuangxiangniao@163.com 举报，一经查实，本站将立刻删除。
发布者：程序猿，转转请注明出处：https://www.chuangxiangniao.com/p/432714.html
微信扫一扫 
支付宝扫一扫 
