Querying remote database via database link

I need to get data from RemoteDB1 while I am logged in to SourceDB. I found that there are two database links previously created on SourceDB to RemoteDB1, called SourceDB_TO_RemoteDB and RemoteDB.

When I queried dba_db_links, I saw that OWNER for both links is PUBLIC, and username for both links is RemoteDB (same as the GLOBAL_NAME in the RemoteDB).

RemoteDB user does not exist in RemoteDB1 but not in SourceDB.

Now I also have user RPT in RemoteDB1 database that has a view in its schema Main_view. Main_view was created on a couple of catalog views that user RPT has SELECT privileges on.

SourceDB also has a user RPT created.

I was trying to use datbase link RemoteDB while logged in to the SourceDB to access Main_view in RPT user schema:

SELECT FIELD1 "Field 1", FIELD2 "Field 2"
FROM Main_view@RemoteDB
WHERE START_TIME > SYSDATE-1
AND FIELD3='Open'
ORDER BY FIELD1;

I get an error

ERROR at line 2:
ORA-00942: table or view does not exist
ORA-02063: preceding line from RemoteDB

I have gotten this error both, while logged in as RPT user and as SYS user.

Can someone help me to query data from RemoteDB1?
LVL 35
YZlatAsked:
Who is Participating?
 
Docteur_ZConnect With a Mentor Commented:
Yous wrote
RemoteDB user does not exist in RemoteDB1 but not in SourceDB.
I guess you've ment "RemoteDB user does exist in RemoteDB1 but not in SourceDB."

So your issue is that this RemoteDB  user doesn't have the necessary grants on the view you want to query (RPT.MAIN_VIEW). So all the tables underlying this view.
0
 
johnsoneConnect With a Mentor Senior Oracle DBACommented:
The error would indicate that the either the user that is connecting to the remote db doesn't have privileges, or you are using an incorrect name.

What happens if you try:

SELECT FIELD1 "Field 1", FIELD2 "Field 2"
FROM RPT.Main_view@RemoteDB
WHERE START_TIME > SYSDATE-1
AND FIELD3='Open'
ORDER BY FIELD1;
0
 
YZlatAuthor Commented:
I tried that and gotten the same error.

I was wondering how would I give the user on SourceDB priveleges on a view on RemotDB1?
0
Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

 
johnsoneSenior Oracle DBACommented:
The user on SourceDB doesn't need privileges on RemotDB1.  The user that the database link connects as in RemotDB1 needs the privilege.  My guess is that you need to connect to RemotDB1 and grant privileges on the view you are trying to select from (RPT.MAIN_VIEW) to the user the link is connecting as.
0
 
YZlatAuthor Commented:
Docteur_Z, yes that's the issue. I did grant the RemoteDB user on the Main_view but still no difference.

What I found is that the underlying view for Main_view is a nother view that is in RemoteDB user's schema. Shouldn't RemoteDB user have privileges then?
0
 
YZlatAuthor Commented:
Got it!

I needed to do two things:

1) Grant SELECT permissions on Main_view to RemoteDB user
2) Perfix Main_view name with schema name when querying from SourceDB

Thanks guys!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.