文档解释
ORA-19596: SPFILE already included
Cause: The SPFILE is already specified for inclusion in this backup or restore conversation. A backup or restore conversation may process only a single instance of the SPFILE.
Action: No action required – the conversation is still active, and more files can be specified.
等等
ORA-19596：RMAN 「SPFILE已包括」的错误
这表明尝试将特定的文件加入到恢复目录，但SPFILE文件已经包含在该恢复目录中。
官方解释
ORA-19596: file is already included in the recovery catalog
Cause: An attempt was made to include a specific file in the recovery catalog, but the SPFILE was already included in the recovery catalog.
Action: Drop the SPFILE from the recovery catalog before attempting to include the file.
常见案例
当使用RMAN从备份恢复数据库时，我们可能会碰到此错误，错误可能发生在“SET UNTIL SCN”语句上。
一般处理方法及步骤
1. 首先，通过执行“rman：catalog”来列出恢复列表中的SPFILE文件：
RMAN> catalog;
2. 然后从恢复列表中删除SPFILE文件：
RMAN> delete noprompt SPFILE;
3. 最后，从恢复期间的SPFILE中可恢复到目标数据库：
RMAN> restore spfile from ”;
