Oracle 19C 无法启用Auto Indexes特性
环境：
OS:Red Hat Enterprise Linux Server release 7.5 (Maipo)
DB:Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
说明：
近期查看Oracle 19C新特性，发现Auto Indexes特性特别实用，想模拟实验看看效果;
1 查看auto_index特性未启用；
SQL> select * from dba_auto_index_config;
2 在启用Automatic Indexing时报如下错误，不支持该特性：
SQL> alter session set container=cjcpdb;
SQL> EXEC DBMS_AUTO_INDEX.CONFIGURE('AUTO_INDEX_MODE','IMPLEMENT');
BEGIN DBMS_AUTO_INDEX.CONFIGURE('AUTO_INDEX_MODE','IMPLEMENT'); END;
*
ERROR at line 1:
ORA-40216: feature not supported
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 79
ORA-06512: at "SYS.DBMS_AUTO_INDEX_INTERNAL", line 9180
ORA-06512: at "SYS.DBMS_AUTO_INDEX", line 283
ORA-06512: at line 1
问题原因：
只有在EXADATA systems系统下才支持Auto Index特性。
Auto indexing will be allowed only in EXADATA systems, if not it will raise ORA-40216: feature not supported when we try it turn it on in non exadata systems.
ORA-40216 When Using Auto Index Feature (Doc ID 2570076.1)
APPLIES TO:
Oracle Database - Enterprise Edition - Version 19.3.0.0.0 and laterInformation in this document applies to any platform.
SYMPTOMS
When attempting to use auto index feature ,e.g. DBMS_AUTO_INDEX.CONFIGURE('AUTO_INDEX_MODE','IMPLEMENT');it reports
ORA-40216: feature not supportedORA-6512: at "SYS.DBMS_SYS_ERROR", line 79ORA-6512: at "SYS.DBMS_AUTO_INDEX_INTERNAL", line 9180ORA-6512: at "SYS.DBMS_AUTO_INDEX", line 283ORA-6512: at line 1
CHANGES
CAUSE
This issue has been discussed in
Bug 30017206 : ADW : AUTO INDEX FEATURE NOT WORKING IN FUTURE PRODUCTION
Closed as 'Not a Bug.'Development explains:Auto indexing will be allowed only in EXADATA systems, if not it will raise ORA-40216: feature not supported when we try it turn it on in non exadata systems.
SOLUTION
Do not use AUTO INDEX FEATURE in non-exadata systems.
想学习AUTO INDEX FEATURE可以查看docs.oracle.com
Database Administrator’s Guide---21 Managing Indexes
21.7 Managing Auto Indexes
You can use the automatic indexing feature to configure and use auto indexes in an Oracle database to improve database performance.
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