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今天在18c做测试的时候，对PDB创建快照，发生如下的报错信息:
[oracle@oracle18c ~]$ sqlplus / as sysdba
SQL*Plus: Release 18.0.0.0.0 - Production on Fri Sep 28 22:25:22 2018
Version 18.3.0.0.0
Copyright (c) 1982, 2018, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.3.0.0.0
SQL> alter pluggable database pdb1 snapshot pdb1_test1;
alter pluggable database pdb1 snapshot pdb1_test1
*
ERROR at line 1:
ORA-12754: Feature PDB SNAPSHOT CAROUSEL is disabled due to missing capability
.
解决办法：
[oracle@oracle18c ~]$ sqlplus / as sysdba
SQL*Plus: Release 18.0.0.0.0 - Production on Fri Sep 28 22:34:08 2018
Version 18.3.0.0.0
Copyright (c) 1982, 2018, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.3.0.0.0
SQL> alter session set container=cdb$root;
Session altered.
SQL> alter system set "_exadata_feature_on"=true scope=spfile;
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 1191181104 bytes
Fixed Size 8895280 bytes
Variable Size 771751936 bytes
Database Buffers 402653184 bytes
Redo Buffers 7880704 bytes
Database mounted.
Database opened.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
5 PDB1 MOUNTED
SQL> alter pluggable database pdb1 open;
Pluggable database altered.
SQL> alter session set container=pdb1;
Session altered.
SQL> alter pluggable database pdb1 snapshot pdb1_test1;
Pluggable database altered.
SQL> SET LINESIZE 150
COL CON_NAME FORMAT a10
COL SNAPSHOT_NAME FORMAT a30
COL SNAP_SCN FORMAT 9999999
COL FULL_SNAPSHOT_PATH FORMAT a55SQL> SQL> SQL> SQL>
SQL> select con_id, con_name, snapshot_name,snapshot_scn as snap_scn, full_snapshot_path from dba_pdb_snapshots order by snap_scn;
CON_ID CON_NAME SNAPSHOT_NAME SNAP_SCN FULL_SNAPSHOT_PATH
---------- ---------- ------------------------------ -------- -------------------------------------------------------
5 PDB1 PDB1_TEST1 1711651 /u01/oradata/pdb1/snap_70485319_1711651.pdb