Question

ORA-01775: looping chain of synonyms - What is the SQL to find the synonyms causing the problem?

Asked by: bcarlis

Hi,

I logged into a newly created APEX environment
and went to the Home>SQL Workshop>SQL Scripts
and got the following error:

Invalid exists/not exists condition: ORA-01775: looping chain of synonyms
I have not created any objects yet.

I looked up:
ORA-01775: looping chain of synonyms
Cause: Through a series of CREATE synonym statements, a synonym was defined that referred to itself. For example, the following definitions are circular:

CREATE SYNONYM s1 for s2 CREATE SYNONYM s2 for s3 CREATE SYNONYM s3 for s1
 
Action says: Change one synonym definition so that it applies to a
base table or view and retry the operation.

What is the SQL to find the synonyms causing the problem?

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Asked On
2008-12-24 at 06:54:40ID24007924
Tags

DBA

,

APEX

,

database

,

SQL

,

Oracle SCM

Topic

Enterprise Software

Participating Experts
1
Points
100
Comments
7

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Answers

 

by: angelIIIPosted on 2008-12-24 at 07:21:28ID: 23240372

this happens also when the synonym and the base object it pointed to had the same name, after which the base object is dropped, the synonym refers to itself.

the only solution is to drop the synonym in question or recreate an object with that name.

how to find:
http://www.telligence.com.au/site/index.cfm?display=18718
Orphaned Synonyms: Michael Barwell: Shows orphaned synonyms i.e. syns which point TO objects that no longer exist . ... (0.8 Kb)

 

by: bcarlisPosted on 2008-12-24 at 08:27:31ID: 23240714

File not found: /site/content.cfm

Orphaned Synonyms: Michael Barwell: Shows orphaned synonyms i.e. syns which point TO objects that no longer exist . ... (0.8 Kb)

it is gone....

 

by: angelIIIPosted on 2008-12-24 at 09:12:37ID: 23240998

not good :(

the query is anyhow based on ALL_SYNONYMS and ALL_OBJECTS finding out the synonyms for which the base object does not exist:

http://www.ss64.com/orad/ALL_SYNONYMS.html
http://www.ss64.com/orad/ALL_OBJECTS.html

SELECT s.*
  FROM ALL_SYNONYMS s
  LEFT JOIN ALL_OBJECTS o
    ON o.OBJECT_OWNER = s.TABLE_OWNER
   AND o.OBJECT_NAME = s.TABLE_NAME
 WHERE o.OBJECT_NAME IS NULL
                                              
1:
2:
3:
4:
5:
6:

Select allOpen in new window

 

by: bcarlisPosted on 2008-12-30 at 05:51:51ID: 23262444

the query returns 353 rows.

so I just drop them all and the problem goes away?

They are definately not used for anything?

 

by: angelIIIPosted on 2008-12-30 at 07:13:52ID: 23263070

I would exclude those for SYS and SYSTEM owner.

SELECT s.*
  FROM ALL_SYNONYMS s
  LEFT JOIN ALL_OBJECTS o
    ON o.OWNER = s.TABLE_OWNER
   AND o.OBJECT_NAME = s.TABLE_NAME
 WHERE o.OBJECT_NAME IS NULL
   AND o.OWNER NOT IN ( 'SYS', 'SYSTEM' )

                                              
1:
2:
3:
4:
5:
6:
7:

Select allOpen in new window

 

by: bcarlisPosted on 2008-12-30 at 08:02:19ID: 23263460

don't you mean    s.OWNER

AND s.OWNER NOT IN ( 'SYS', 'SYSTEM' )

they are all owned by PUBLIC

 

by: angelIIIPosted on 2008-12-30 at 08:32:07ID: 23263720

yes, sorry, s.owner...

if they are owned by public , it should not be a problem.
you might upload the listing in a file, if you want me to check...

20120131-EE-VQP-002

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