ORA-20011: Approximate NDV failed: ORA-00600: internal error code, arguments-优快云博客

本文详细介绍了在进行EBS跨平台迁移过程中遇到的DBMS_STATS.GATHER_FIXED_OBJECTS_STATSFails错误的解决方法，通过升级到11.2.0.2版本或应用补丁9056912来解决ORA-600错误。同时，提供了替代解决方案以避免在收集外部表统计信息时出现错误。

在做EBS 跨平台迁移时，有一个步骤如下:

取消统计信息自动收集

从源应用服务器上拷贝$APPL_TOP/admin/adstats.sql到目标数据库端，以SYSDBA连接到sqlplus, 使用下面的命令重新启动数据库为 restricted 模式，运行 adstats.sql 脚本：

$ sqlplus "/ as sysdba"
SQL> alter system enable restricted session;
SQL> @adstats.sql
$ sqlplus "/ as sysdba"
SQL> alter system disable restricted session;
SQL> exit;

结果运行报错：
ERROR at line 1:
ORA-20011: Approximate NDV failed: ORA-00600: internal error code, arguments:
[1350], [1], [23], [], [], [], [], [], [], [], [], []
ORA-06512: at “SYS.DBMS_STATS”, line 24867
ORA-06512: at “SYS.DBMS_STATS”, line 25408

查询可能有如下几个原因：

A Solution :
echo $ORA_NLS10
export ORA_NLS10=$ORACLE_HOME/nls/data/9idata
查询发现 ORA_NLS10设置正确。

继续查询metalink , 发现是一个未发布的bug - DBMS_STATS.GATHER_FIXED_OBJECTS_STATS Fails With ORA-600 [1350], [1], [23] (文档 ID 1138205.1)

Cause
This is caused by unpublished Bug:9056912 - GATHERING STATISTICS ON EXTERNAL TABLES REQUIRES NULL FOR ESTIMATE_PERCENT
See Note:9056912.8 for an overview
Bug:9056912 is fixed in RDBMS 11.2.0.2 and 12.1 (Future Release).

Solution
To implement a solution for Bug:9056912, please execute any of the below alternative solutions:
•Upgrade to 11.2.0.2
OR
•Download and apply interim Patch:9056912, if available for your platform. and RDBMS release.
To check for conflicting patches, please use the MOS Patch Planner Tool.
OR
•Use the workaround with specify null for estimate_percent when collecting stats for an external table using gather_table_stats.

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