oracle SQL解析流程小结
发布时间：2021-12-01 16:04:19 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
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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：宁德站长网） 【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! |
