[20190102]ORA-01775 looping chain of synonyms.txt
[20190102]ORA-01775 looping chain of synonyms.txt
--//别人的系统导出遇到ora-01775错误,这个问题以前也遇到过.重复演示出来,主要问题在于用户以前导出异常中断,
--//里面存在SYS_IMPORT_SCHEMA_01表,并且给这个表建立同义词.以后维护中删除SYS_IMPORT_SCHEMA_01表.这样再使用
--//导入操作时就会遇到这个问题.
1.环境:
SCOTT@book> @ ver1
PORT_STRING VERSION BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
SCOTT@book> desc SYS_EXPORT_TABLE_01
ERROR:
ORA-04043: object SYS_EXPORT_TABLE_01 does not exist
SCOTT@book> create public synonym SYS_EXPORT_TABLE_01 for SYS_EXPORT_TABLE_01;
Synonym created.
SCOTT@book> desc SYS_EXPORT_TABLE_01
SP2-0749: Cannot resolve circular path of synonym "SYS_EXPORT_TABLE_01"
--//oracle设计存在一些缺陷,即使对象不存在可以建立这样的同义词.
SCOTT@book> desc SYS_IMPORT_TABLE_01
ERROR:
ORA-04043: object SYS_IMPORT_TABLE_01 does not exist
SCOTT@book> create public synonym SYS_IMPORT_TABLE_01 for SYS_IMPORT_TABLE_01;
Synonym created.
SCOTT@book> desc SYS_IMPORT_TABLE_01
SP2-0749: Cannot resolve circular path of synonym "SYS_IMPORT_TABLE_01"
2.导出:
$ expdp scott/book tables=depty
Export: Release 11.2.0.4.0 - Production on Wed Jan 2 15:37:06 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SCOTT"."SYS_EXPORT_TABLE_01": scott/a***** tables=depty
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 64 KB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported "SCOTT"."DEPTY" 5.968 KB 6 rows
Master table "SCOTT"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_TABLE_01 is:
/u01/app/oracle/admin/book/dpdump/expdat.dmp
Job "SCOTT"."SYS_EXPORT_TABLE_01" successfully completed at Wed Jan 2 15:37:12 2019 elapsed 0 00:00:05
--//导出没有问题.
SCOTT@book> rename depty to deptz;
Table renamed.
3.导入:
$ impdp scott/book tables=depty
Import: Release 11.2.0.4.0 - Production on Wed Jan 2 15:40:05 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39001: invalid argument value
ORA-01775: looping chain of synonyms
--//导入出现ora-01775错误.
$ oerr ora 1775
01775, 00000, "looping chain of synonyms"
// *Cause:
// *Action:
4.跟踪看看:
SYS@book> alter system set events '1775 trace name ERRORSTACK level 3';
System altered.
$ impdp scott/book tables=depty
....
$ grep -i ora-01775 *.trc
book_ora_61255.trc:ORA-01775: looping chain of synonyms
--//检查跟踪文件可以发现如下:
dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x0, level=3, mask=0x0)
----- Error Stack Dump -----
ORA-01775: looping chain of synonyms
----- Current SQL Statement for this session (sql_id=4mbjyfu9mumx7) -----
SELECT COUNT(*) FROM SYS_IMPORT_TABLE_01
----- PL/SQL Stack -----
----- PL/SQL Call Stack -----
object line object
handle number name
0x7e2d2aa8 158 package body SYS.DBMS_DATAPUMP
0x7e2d2aa8 5213 package body SYS.DBMS_DATAPUMP
0x7cf39980 1 anonymous block
SCOTT@book> SELECT COUNT(*) FROM SYS_IMPORT_TABLE_01;
SELECT COUNT(*) FROM SYS_IMPORT_TABLE_01
*
ERROR at line 1:
ORA-01775: looping chain of synonyms
--//感觉先检查这个表.结果报错.
SCOTT@book> select * from dba_objects where object_name='SYS_IMPORT_TABLE_01';
OWNER OBJECT_NAME SUBOBJECT_ OBJECT_ID DATA_OBJECT_ID OBJECT_TYPE CREATED LAST_DDL_TIME TIMESTAMP STATUS T G S NAMESPACE EDITION_NAME
------ -------------------- ---------- ---------- -------------- ----------- ------------------- ------------------- ------------------- ------- - - - --------- -------------
PUBLIC SYS_IMPORT_TABLE_01 90566 SYNONYM 2019-01-02 15:38:28 2019-01-02 15:41:03 2019-01-02:15:41:03 VALID N N N 1
SCOTT@book> drop public synonym SYS_IMPORT_TABLE_01 ;
Synonym dropped.
SYS@book> alter system set events '1775 trace name errorstack off';
System altered.
$ impdp scott/book tables=depty
Import: Release 11.2.0.4.0 - Production on Wed Jan 2 15:47:43 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SCOTT"."SYS_IMPORT_TABLE_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_IMPORT_TABLE_01": scott/a****** tables=depty
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "SCOTT"."DEPTY" 5.968 KB 6 rows
Job "SCOTT"."SYS_IMPORT_TABLE_01" successfully completed at Wed Jan 2 15:47:47 2019 elapsed 0 00:00:03
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