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 lo