分类目录归档：Oracle 23ai

Oracle23ai新特性—sqlplus errordetails功能

发表于 2024 年 7 月 30 日 由 惜分飞

在oracle 23ai中如果sqlplus执行遇到ORA-错误,会有对应的Help: https://docs.oracle.com/error-help/db/ORA-XXXXX提示,由于以前的使用习惯或者是提示本身意义不大等原因,还是希望在sqlplus中关闭这类提示.通过分析确认该提示是由errordetails来控制的

[oracle@xifenfei admin]$ sqlplus / as sysdba

SQL*Plus: Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems on Mon Jul 29 22:44:23 2024
Version 23.5.0.24.07

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Enterprise Edition Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems
Version 23.5.0.24.07

SQL> select * from xff.xifenfei;
select * from xff.xifenfei
                  *
ERROR at line 1:
ORA-00942: table or view "XFF"."XIFENFEI" does not exist
Help: https://docs.oracle.com/error-help/db/ora-00942/

SQL> show errordetails   <--该值默认为on
errordetails ON

设置errordetails off即可实现关闭Help: https://docs.oracle.com/error-help/db/ORA-XXXXX提示

SQL> set errordetails off
SQL>  select * from xff.xifenfei;
 select * from xff.xifenfei
                   *
ERROR at line 1:
ORA-00942: table or view "XFF"."XIFENFEI" does not exist

设置errordetails verbose可以实现更加详细的提示

SQL> set errordetails verbose
SQL> select * from xff.xifenfei;
select * from xff.xifenfei
                  *
ERROR at line 1:
ORA-00942: table or view "XFF"."XIFENFEI" does not exist
Help: https://docs.oracle.com/error-help/db/ora-00942/
Cause:     The specified table or view did not exist, or a synonym
           pointed to a table or view that did not exist.
           To find existing user tables and views, query the
           ALL_TABLES and ALL_VIEWS data dictionary views. Certain
           privileges may be required to access the table. If an
           application returned this message, then the table that the
           application tried to access did not exist in the database, or
           the application did not have access to it.
Action:    Check each of the following:
           - The spelling of the table or view name is correct.
           - The referenced table or view name does exist.
           - The synonym points to an existing table or view.

           If the table or view does exist, ensure that the correct access
           privileges are granted to the database user requiring access
           to the table. Otherwise, create the table.

           Also, if you are attempting to access a table or view in another
           schema, make sure that the correct schema is referenced and that
           access to the object is granted.
Params: 1) object_name: The table or view name specified as
                        SCHEMA.OBJECT_NAME, if one is provided.
                        Otherwise, it is blank.

如果要实现sqlplus启动即屏蔽该提示,可以在glogin.sql文件($ORACLE_HOME/sqlplus/admin目录中)设置
errordetails-off

[oracle@xifenfei admin]$ sqlplus / as sysdba

SQL*Plus: Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems on Mon Jul 29 22:44:23 2024
Version 23.5.0.24.07

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Enterprise Edition Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems
Version 23.5.0.24.07

SQL> show errordetails;
errordetails OFF
SQL> select * from xifenfei.xff;
select * from xifenfei.xff
                       *
ERROR at line 1:
ORA-00942: table or view "XIFENFEI"."XFF" does not exist
发表在 Oracle 23ai | 标签为 , | 评论关闭

Oracle23ai新特性—SCHEMA级授权( grant select any table on schema)

发表于 2024 年 7 月 29 日 由 惜分飞

创建测试用户a并在a中创建t1,t2两个测试表,另外创建用户b(只授权登录权限)

[oracle@xifenfei ~]$ ss

SQL*Plus: Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems on Mon Jul 29 22:14:11 2024
Version 23.5.0.24.07

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Enterprise Edition Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems
Version 23.5.0.24.07

SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         3 XIFENFEI                       READ WRITE NO

SQL> create user b identified by oracle;

User created.

SQL> grant create session  to b;

Grant succeeded.

SQL> grant unlimited tablespace to a;

Grant succeeded.

SQL> create table a.t1 as select * from dba_objects;

Table created.

SQL> c/t1/t2;
  1* create table a.t2 as select * from dba_objects
SQL> /

Table created.

SQL> select count(1) from a.t1;

  COUNT(1)
----------
     70638

SQL> select count(1) from a.t2;

  COUNT(1)
----------
     70639

SQL> create user b identified by oracle;

User created.

SQL> grant create session  to b;

Grant succeeded.

直接使用b用户登录并尝试查询a用户数据,结果是无法查询数据报ora-00942(意料之中因为b现在无权限访问a.t1表)

SQL> conn b/oracle@127.0.0.1/xifenfei
Connected.
SQL> select count(1) from a.t1;
select count(1) from a.t1
                       *
ERROR at line 1:
ORA-00942: table or view "A"."T1" does not exist
Help: https://docs.oracle.com/error-help/db/ora-00942/

直接schema级别授权a用户下面的表给b用户查询权限

[oracle@xifenfei ~]$ ss

SQL*Plus: Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems on Mon Jul 29 22:07:14 2024
Version 23.5.0.24.07

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Enterprise Edition Release 23.0.0.0.0 - for Oracle Cloud and Engineered Systems
Version 23.5.0.24.07

SQL>  grant select any table on schema a to b;

Grant succeeded.

SQL>  conn b/oracle@127.0.0.1/xifenfei
Connected.
SQL> select count(1) from a.t1;

  COUNT(1)
----------
     70638

SQL> select count(1) from a.t2;

  COUNT(1)
----------
     70639

在a用户中新增加表,在b用户中可以直接查询(无需再次授权)

SQL> conn a/oracle@127.0.0.1/xifenfei
Connected.
SQL>  create table t3 as select * from tab;

Table created.

SQL> select count(1) from t3;

  COUNT(1)
----------
         3

SQL> conn b/oracle@127.0.0.1/xifenfei
Connected.
SQL> select count(1) from a.t3;

  COUNT(1)
----------
         3

Oracle 23ai中，Oracle引入了架构级（SCHEMA级别）授权。这允许你以更简单、更直观的方式对整个Schema进行授权。以前的版本中如果需要类似授权操作,需要对schema下面所有表进行grant select on user.table to user2形式授权工作量比较大而且user1中如果新增加表还需要额外授权

发表在 Oracle 23ai | 标签为 , | 评论关闭

Oracle 23ai rm redo*.log恢复

发表于 2024 年 5 月 4 日 由 惜分飞

在oracle 23ai的pdb中创建用户和表,并且插入数据(不提交),在另外一个会话中abort库,并从os层面rm删除掉redo文件,模拟数据库当前redo丢失,数据库恢复
创建用户和表并插入数据

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:40:55 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

SQL> 
SQL> 
SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 FREEPDB1                       READ WRITE NO

SQL> alter session set container=FREEPDB1;

Session altered.

SQL> create user xff identified by oracle;

User created.

SQL> grant dba to xff ;

Grant succeeded.

SQL> conn xff/oracle@FREEPDB1
Connected.
SQL> create table t1 as select * from dba_objects;

Table created.


SQL> insert into t1 select *from t1;

75877 rows created.

SQL> /

151754 rows created.

另外一个会话中abort库

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:43:30 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

SQL> shutdown abort;
ORACLE instance shut down.
SQL> 
SQL> 
SQL> 
SQL> exit
Disconnected from Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

操作系统层面rm -rf 删除redo

[oracle@xifenfei ~]$ cd $ORACLE_BASE/oradata
[oracle@xifenfei oradata]$ ls
FREE
[oracle@xifenfei oradata]$ cd FREE/
[oracle@192 FREE]$ ls
control01.ctl  FREEPDB1  redo01.log  redo03.log    system01.dbf  undotbs2.dbf
control02.ctl  pdbseed   redo02.log  sysaux01.dbf  temp01.dbf    users01.dbf
[oracle@xifenfei FREE]$ ls -ltr
total 2441036
drwxr-x---. 2 oracle     1000         85 May  1 16:49 pdbseed
-rw-r-----. 1 oracle oinstall   20979712 May  1 16:51 temp01.dbf
drwxr-x---. 2 oracle     1000        104 May  1 16:55 FREEPDB1
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:23 redo01.log
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:23 redo02.log
-rw-r-----. 1 oracle oinstall    7348224 May  3 15:23 users01.dbf
-rw-r-----. 1 oracle oinstall 1080041472 May  3 15:43 system01.dbf
-rw-r-----. 1 oracle oinstall  692068352 May  3 15:43 sysaux01.dbf
-rw-rw----. 1 oracle oinstall   52436992 May  3 15:43 undotbs2.dbf
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:43 redo03.log
-rw-r-----. 1 oracle oinstall   18759680 May  3 15:43 control01.ctl
-rw-r-----. 1 oracle oinstall   18759680 May  3 15:43 control02.ctl
[oracle@xifenfei FREE]$ rm -rf redo0*
[oracle@192 FREE]$ ls -l redo*
ls: cannot access 'redo*': No such file or directory
[oracle@xifenfei FREE]$

尝试启动数据库，报ora-00313，ora-00312，ora-27037等错误

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:44:17 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
Database mounted.
SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/opt/oracle/oradata/FREE/redo03.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 7

由于所有redo均被删除(包含当前redo),因此只能强制resetlogs方式打开库,尝试打开数据库

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount pfile='/tmp/pfile'
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
Database mounted.
SQL> recover database until cancel;
ORA-00279: change 4244588 generated at 05/03/2024 15:23:22 needed for thread 1
ORA-00289: suggestion :
/opt/oracle/product/23ai/dbhomeFree/dbs/arch1_6_1167842962.dbf
ORA-00280: change 4244588 for thread 1 is in sequence #6


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/opt/oracle/oradata/FREE/system01.dbf'


ORA-01112: media recovery not started

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-00603: ORACLE server session terminated by irrecoverable error
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kcbzib_kcrsds_1], [], [], [], [],
[], [], [], [], [], [], []
Process ID: 5596
Session ID: 29 Serial number: 63204

数据库遇到常见的ORA-600 kcbzib_kcrsds_1错误,这类错误类似oracle在12c之前版本中的ORA-600 2662错误
ORA-600 kcbzib_kcrsds_1报错
存储故障,强制拉库报ORA-600 kcbzib_kcrsds_1处理
redo异常强制拉库报ORA-600 kcbzib_kcrsds_1修复
ORA-00603 ORA-01092 ORA-600 kcbzib_kcrsds_1
这种一般就是scn问题,通过修改数据库scn,数据库启动报ORA-16433错误

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:49:00 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount pfile='/tmp/pfile';
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
SQL> alter database mount;

Database altered.

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-16433: The database or pluggable database must be opened in read/write mode.


SQL> shutdown abort;
ORACLE instance shut down.

处理ctl,open数据库成功

SQL> startup nomount pfile='/tmp/pfile'
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "FREE" NORESETLOGS  NOARCHIVELOG
  2      MAXLOGFILES 16
  3      MAXLOGMEMBERS 3
  4      MAXDATAFILES 1024
  5      MAXINSTANCES 8
  6      MAXLOGHISTORY 292
  7  LOGFILE
  8    GROUP 1 '/opt/oracle/oradata/FREE/redo01.log'  SIZE 200M BLOCKSIZE 512,
  9    GROUP 2 '/opt/oracle/oradata/FREE/redo02.log'  SIZE 200M BLOCKSIZE 512,
 10    GROUP 3 '/opt/oracle/oradata/FREE/redo03.log'  SIZE 200M BLOCKSIZE 512
 11  -- STANDBY LOGFILE
 12  DATAFILE
 13    '/opt/oracle/oradata/FREE/system01.dbf',
 14    '/opt/oracle/oradata/FREE/pdbseed/system01.dbf',
 15    '/opt/oracle/oradata/FREE/sysaux01.dbf',
 16    '/opt/oracle/oradata/FREE/pdbseed/sysaux01.dbf',
 17    '/opt/oracle/oradata/FREE/users01.dbf',
 18    '/opt/oracle/oradata/FREE/pdbseed/undotbs01.dbf',
 19    '/opt/oracle/oradata/FREE/FREEPDB1/system01.dbf',
 20    '/opt/oracle/oradata/FREE/FREEPDB1/sysaux01.dbf',
 21    '/opt/oracle/oradata/FREE/FREEPDB1/undotbs01.dbf',
 22    '/opt/oracle/oradata/FREE/FREEPDB1/users01.dbf',
 23    '/opt/oracle/oradata/FREE/undotbs2.dbf'
 24  CHARACTER SET AL32UTF8
 25  ;

Control file created.

SQL> recover database;
Media recovery complete.
SQL> alter database open;

Database altered.

SQL> show pdbs;

          CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------------- ------------------------------ ---------- ----------
               2 PDB$SEED                       READ ONLY  NO
               3 FREEPDB1                       READ WRITE NO

至此当前数据库redo故障模拟和恢复基本完成

发表在 Oracle 23ai, Oracle备份恢复 | 标签为 , , , | 评论关闭