Creating Views over DB links

I have a requirement to create views in 3 different versions of Oracle 8i, 9i and 10g. All the views will be created over DB links and the source tables reside in an Oracle 10g instance. Other than the performance is anybody aware of any other issues with this approach?
Thanks
Martin

Again, though, you're going to need to be more specific about the database releases...
Database links between 10.2 and 8.1.7 are supported.
Database links between 10.2 and 9.2 require that the 9.2 end be on 9.2.0.4 or later
Database links between 10.1 and 8.1.7 require that the 8.1.7 end be on 8.1.7.4 or later
Database links between 10.1 and 9.2 are supported
You'll want to review the Client/Server Interoperability Matrix on Metalink to get more detailed information on what is and is not supported.
Justin

Similar Messages

Create View from Database Links - Question

Question
I'm missing something simple.
I'm trying to create a view, from a Database Link.
CREATE VIEW view_name
AS SELECT a.*
FROM schema.tablename@dblink a;
When I run this in the SQL Commands window.
I get this error message.
ORA-00933: SQL command not properly ended
What am I missing? Any help is appreciated...

CREATE VIEW vw_name
AS SELECT a.*
FROM [email protected] a;

 
1) User (schema) which is creating view must have proper db_link to source database. For that try this for testing purpose:
select 1 from [email protected] 
If this fail then db_link is not ok! This step is absolute must to go any further step to!!!
 
2) when db_link is set, then your view should be named as:
CREATE VIEW vw_name
AS SELECT *
FROM schema_name.[email protected]; 
please pay attention to "schema_name", because from remote side every table is in some schema so it really need declaration of owner schema.
 
Hope this helps...

BC4J, 1012: Cannot create view over 2 different EOs

Hi,
a strange thing is happening here:
I have EOs in different packages. I want to create a join-view over these EOs in one of the packages.
For some or other reason i cannot have the 2 EOs together. I can add either one of them with any other EO in the project but not these specific 2 EOs.
Can someone from oracle please tell me what validations are done in the "Create View" - wizard when adding a EO to participate in the view so that i can check the code for irregularities? There is no error message - it just refuses to go to the "selected" window.
Any ideas PLEASE?
Thanks.

Fixing the FK name in the association.xml file, bouncing JDev(since JDev doesn't refresh internal state when a xml file changes externally), fixes the problem.

User defined function in materialized view over db link

I am working in Oracle 10g. Trying to create a materialized view to populate a reporting warehouse from a transactaional database (also oracle 10g).
In SQL plus I can access a function in a package on the remote database but when I try to use the "working" sql statement in a materialized view I get an invalid identifier error.
Basically my select statement is ...
select
ColA,
ColB,
PackageName.Function@db_link(parameters)
from
SourceTable@db_link .....
The select statement works but when I use it within a create materialized view statement I get ora-00904: PackageName.Function: invalid identifier.
Any help is appreciated.
Tx,

What about the error message doesn't make sense?
The identifier is valid when used in the SQL statement outside of the Create Materailized view. It is my understanding that "most any" valid SQL statement should be usable in an MV.
Put the function in the local schema?
I tried that. If the function does not have any input parameters it works. But if it has input parameters the create view statement complains about ORA-00997: illegal use of LONG datatype.
I made a real simple function Pkg.ASTRING - no input parameters just returns the string 'ABC' -- that worked.
Then I added an input parameter Pkg.ASTRING (TheInString VARCHAR2) that returns the same 'ABC' string.
When I include it in the create MV statement Pkg.ASTRING('XYZ') I get the illegal use of LONG datatype.
What LONG datatype?

Ora-00980 creating mv over db link

Hi,
I need some help traking down a pesky ora-00980 syn tranlation no longer valid. Here is my situation. I have a view foo
created in schema A that access data over a db link defined in schema A. User A can access data just fine. User A has granted select on the view to user B. User B can select data from the view just fine.
select * from a.foo ;
...lots of data
User B sees data...no synonym is involved.
Now user B tries to create a mv
create materialized view bar as select * from a.foo;
throws ora-00980
User A can create the same MV just fine.
Any suggestions? 10.2.0.4.0
Steve

Hi,
I suppose you are getting a below problem.
If you have a table in schema A of remote database.
Synonym exist in schema B of local database.
Synonym or when you try to exist this synonym from any other schema or database through pl/sql you would get ora-980 (ie. third level resolution is not possible through PL/sql).
Am not sure whether this would hold true for materialized view or not.
As a test case,
Create a synonym in schema B pointing directly to schema A of remote database (instead of via schema A of local database). Now try to create a materialized view.
But before that make sure schema B has a direct access to synonym of A (without any roles)
Regards
Anurag Tibrewal.

Need Interactive Report EBiz 11.5.9 inventory tables and views over DB Link

I need to create an Interactive report on this SQL:
select glcc.segment4 as ENTITY_CODE
     , glcc.segment2 as DEPARTMENT_NUMBER
     , glcc.segment1 as Account
     , ai.VENDOR_NUMBER as VENDOR_NUMBER
     , ai.VENDOR_NAME as VENDOR_NAME
     , aiv.DESCRIPTION as DESCRIPTION
   -- , aiv.period_name
     , aiv.AMOUNT as INVOICE_DISTRIBUTION_AMOUNT
     , aiv.INVOICE_NUM as INVOICE_NUM
     , aiv.PO_NUMBER as PO_NUMBER
     , trunc(aiV.ACCOUNTING_DATE,'DD') as GL_DATE
     , aipv.CHECK_AMOUNT as CHECK_AMOUNT
     , aipv.CHECK_DATE as CHECK_DATE
     , aipv.CHECK_NUMBER as CHECK_NUMBER
     , glcc.segment3 as FUNDING_SOURCE
     , glcc.segment5 as IC
   -- ,to_char(aiv.INVOICE_DATE,'MON-YY') INVOICE_DAT\
--   ,aiv.DISTRIBUTION_LINE_NUMBER
from
    apps.ap_invoice_distributions_V@FIN_PRD aiv
    ,apps.Ap_invoices_v@FIN_PRD ai
    ,apps.ap_invoice_payments_v@FIN_PRD aipv
    ,apps.gl_code_combinations@FIN_PRD glcc
where 1=1
and aiv.INVOICE_ID=aipv.INVOICE_ID(+)
and ai.INVOICE_ID=aiv.invoice_id
and aiv.PERIOD_NAME='JUL-08'
and glcc.code_combination_id=aiv.DIST_CODE_COMBINATION_ID
--and aipv.CHECK_ID is nullas you can see I am using a database link. I have the link setup and working fine on other Interactive Reports. The thing about this on is I need to run this in the connection before I run the SQL in order to see any data:
begin
    dbms_application_info.set_client_info('0');
end;Any idea how I can do this?

Hi Scott;
I tried this in Home>Application Builder>Application 108>Shared Components>Edit Security Attributes \"Virtual Private Database (VPD)":
if :APP_PAGE_ID = 2 then
begin
dbms_application_info.set_client_info('0');
end;
end if;
The page ran but saw no data.
Then this:
if :APP_PAGE_ID = 2 then
begin
dbms_application_info.set_client_info('0')@FIN_PRD;
end;
end if;
The page failed to run with this error:
ORA-06550: line 3, column 51: PLS-00103: Encountered the symbol "@" when expecting one of the following: := . ( % ; The symbol ":= was inserted before "@" to continue
I thought for sure this would have done it!

Report over database link error

Good morning all.
I have a database link LINKA from USERA on LOCALSERVER to USERB on REMOTESERVER.
(create database link LINKA connect to USERB identified by mypassword using validtns)
In USERC on REMOTESERVER I have a TABLEX, with grant all on TABLEX to USERB on REMOTESERVER.
In USERB on REMOTESERVER I have a view TABLEXV, select * from USERC.TABLEX
From USERA on LOCALSERVER I can select * from TABLEXV@LINKA. In fact I can insert/update/delete tablexv from USERA.
I also have a view TABLEXV on USERA, select * from TABLEXV@LINKA. I can also select/insert/update/delete from USERA.TABLEXV.
So far so good - all working as expected.
Then, my APEX app on LOCALSERVER, interactive report, parsing schema USERA, querying TABLEXV, I get the following:
when "Exclude Link Column", I get the error "The requested URL /pls/apex/f was not found on server.
when "Link to Single Row View", report displays correctly.
when "Link to Custom Target", I get the error "The requested URL /pls/apex/f was not found on server.
When I run the select * from TABLEXV as a regular report (i.e. not interactive), I also get the error.
So the only time I get the report displayed correctly is using IR and "Link to Single Row View".
However, clicking on the link (for Single Row View) I get "The requested URL /pls/apex/wwv_flow.show was not found on this server.".
To summarize:
- accessing table via view over database link
- works outside of apex without issue
- inside only works when Link to Single Row View set
- But clicking on link fails
I could live with just having the Link to Singe Row View option if I could disable displaying of the icon so that the user cant click on it.
APEX 3.2.00.27
EE Database - 10.2.0.3 (yes I know out of support)
Remote EE Database - 10.2.0.5
Real object names replaced to protect the innocent!
Anyone got any clues?
I have used remote tables many times in my APEX applications and never had this issue.
Thanks,
Rob @ very confused .com

Good morning all.
I have a database link LINKA from USERA on LOCALSERVER to USERB on REMOTESERVER.
(create database link LINKA connect to USERB identified by mypassword using validtns)
In USERC on REMOTESERVER I have a TABLEX, with grant all on TABLEX to USERB on REMOTESERVER.
In USERB on REMOTESERVER I have a view TABLEXV, select * from USERC.TABLEX
From USERA on LOCALSERVER I can select * from TABLEXV@LINKA. In fact I can insert/update/delete tablexv from USERA.
I also have a view TABLEXV on USERA, select * from TABLEXV@LINKA. I can also select/insert/update/delete from USERA.TABLEXV.
So far so good - all working as expected.
Then, my APEX app on LOCALSERVER, interactive report, parsing schema USERA, querying TABLEXV, I get the following:
when "Exclude Link Column", I get the error "The requested URL /pls/apex/f was not found on server.
when "Link to Single Row View", report displays correctly.
when "Link to Custom Target", I get the error "The requested URL /pls/apex/f was not found on server.
When I run the select * from TABLEXV as a regular report (i.e. not interactive), I also get the error.
So the only time I get the report displayed correctly is using IR and "Link to Single Row View".
However, clicking on the link (for Single Row View) I get "The requested URL /pls/apex/wwv_flow.show was not found on this server.".
To summarize:
- accessing table via view over database link
- works outside of apex without issue
- inside only works when Link to Single Row View set
- But clicking on link fails
I could live with just having the Link to Singe Row View option if I could disable displaying of the icon so that the user cant click on it.
APEX 3.2.00.27
EE Database - 10.2.0.3 (yes I know out of support)
Remote EE Database - 10.2.0.5
Real object names replaced to protect the innocent!
Anyone got any clues?
I have used remote tables many times in my APEX applications and never had this issue.
Thanks,
Rob @ very confused .com

OBIEE Reports over DB link

Hi,
Can we create reports over Database Link in OBIEE ??
we want to create reports wich is on another database ,we are refering the table in SQL as
apps.gl_je_lines@crp2
how can we refer this in rpd??
thanks in advanced

Any reason why you cannot map your target database tables directly to the RPD (using connection pools)? You don't need to add another server in the middle.

Create a classification view over bapi

Hello,
i start a vb Programm to create a material in sap.
I get all views with material_savedata but the classification view is missing.
Does anybody know if there exist a special bapi to create a classification view
over the .net connector ?
thanks for any help

Hello , thanks a lot for the answers. I am using a vb programm with the proxy connector.
In this connector i have defined:
        Dim oClassnum As String
        Dim oClasstype As String
        Dim oKeydatum As String
        Dim oLanguage As String
        Dim oObjectkey As String
        Dim oObjecttable As String
        Dim oUnvaluated_char As String
        Dim oStandardklasse As String
        Dim oStatus As String
        Dim oAllocvaluechar As New BAPI1003_ALLOC_VALUES_CHARTable
        Dim oAllocvaluecurr As New BAPI1003_ALLOC_VALUES_CURRTable
        Dim oAllocvaluesnum As New BAPI1003_ALLOC_VALUES_NUMTable
        Dim oReturn0 As New BAPIRET2Table
Try
            oProxy.Bapi_Objcl_Getdetail(oClassnum, oClasstype, oKeydatum, _
            oLanguage, _
            oObjectkey, oObjecttable, oUnvaluated_char, oStandardklasse, _
            oStatus, oAllocvaluechar, _
            oAllocvaluecurr, oAllocvaluesnum, oReturn0)
            MsgBox(oReturn0.Item(0).Message.ToString)
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
When i start the programm i get the error:
The function OBJECT_CHECK_ does not exist.
WHY ??
I have also tried to use
Bapi_Charact_Getdetail
to test, if something works but i really do'nt know what the meaning of
the parameters are . Perhaps somebody can explain them to me.
I have tried with charactername and used a * but the result is always 0.
Has somebody a documentation of the fields and tables that are
needed or filled or a little example of the us of the classification.
thanks a lot

Create view link programatically

Hi all,
I am working on this weird requirement.
Basically, I have to create a detail table on a search resullt table. The search result is seeded search, for Item Advance search in Oracle PIM module which is not based upon a VO. The search result table is dynamically built at run time in the EgoItemSearchHelper class and that's where they build the search result VO (EgoItemSearchResultsVO).
Now, I need to access this VO in the controller class, and create a view link programatically between details table VO and this VO. The problem is since I do not have Impl class for the EgoItemSearchResultsVO, how do I accees the column that is the key attribute. Second I do not know how to create view link between the two VOs programatically.
Please help it's urgent.
Thanks

Pratap, My problem is the seeded VO is in seeded AM and my details VO will be in my custom AM, I don't know if we can have a view link between View objects that are in different AMs.
To bypass that problem, I tried to create a VO in the seeded AM programatically and then created a view link. Now since the AM is seeded, and I am adding my details VO to this AM programatically, I thought of creating a table also programatically on the detais VO.
In the end it does not work, I end up getting a show button on the main table, but when I click I get an error (Cannot find <null> attribute in the EOGITEMSEARCHRESULTVO) which is the seeded VO class. Unfortunately there is no boolean variable on the dynamic seeded VO, so don't know what to put in oatablebean.setDetailViewAttributeName("") method;
Any clues on this, appreciate all responses from the forum gurus.
ViewObject voEmp = oaapplicationmodule.createViewObject("MyEmp", "xxuss.oracle.apps.ego.item.eu.server.DetailsOrderLinesVO");
ViewObject voEmp = am.createViewObject("MyEmp", "xxuss.oracle.apps.ego.item.eu.server.DetailsOrderLinesVO");
AttributeDef[] prjLinkAttrs = new AttributeDef[]{oaapplicationmodule.findViewObject("EgoItemSearchResultsVO").findAttributeDef("INVENTORY_ITEM_ID_B")};
System.out.println("definition for attr = "+ prjLinkAttrs[0]);
AttributeDef[] taskLinkAttrs = new AttributeDef[]{voEmp.findAttributeDef("InvId") };
ViewLink vl = am.createViewLinkBetweenViewObjects("MyLink3",
"DetailInv", // accessor name--more on this below
am.findViewObject("EgoItemSearchResultsVO"), // master
prjLinkAttrs, // department attributes
voEmp, // detail
taskLinkAttrs, // employee attributes
null); // assoc clause
System.out.println("view link =" + vl.getName());
OATableBean tb = (OATableBean)createWebBean(oapagecontext,TABLE_BEAN,null,"table");
tb.setViewUsageName("MyEmp");
OAMessageStyledTextBean beans = (OAMessageStyledTextBean)createWebBean(oapagecontext,MESSAGE_STYLED_TEXT_BEAN,OAWebBeanConstants.VARCHAR2_DATATYPE,"number");
beans.setPrompt("column1");
beans.setViewUsageName("MyEmp");
beans.setViewAttributeName("InvId");
tb.addIndexedChild(beans);
oatablebean.setDetail((OAWebBean)tb);
oatablebean.setDetailViewAttributeName("SelectFlag"); // I just tried this, SelectFlag is not a boolean attribute though, is there a way to create a boolean attribute programatically for seeded VO EGOITEMSEARCHRESULTVO and set it here, will it help
oatablebean.setAllDetailsEnabled(true);

Can we create pl/sql code over database link?

Hi All,
We are using Oracle 9i database.
I want to know if we can create or modify pl/sql code (procedue, package, etc) over the database link? That means - can we create a procedure in remote database using the db link?
Thanks,
Dnyanesh

yes, I can connect to the remote database directly and create/modify the packages.
But I want the users not to create them using the db link.
Is there any way to create the pl/sql package over database link?
Thanks,
Dnyanesh

Insufficient priv error when creating a materialised view using DB link!!!!

Hi,
I have a two databases db1 and db2.
I have created a database link from db2 to access user1 schema in db1.
When i try to create a materialised view by accessing user1 table using user 'user2' in db2 database, i get error "ORA-1031: Insufficient Privilege".
The user2 has the priviliges "create view", "create any view", "create materialised view" etc.
I am able to select data, of the table using the database link, but creating materialised view gives this error.
I want to know if the user "user1" should be granting any privilige to user2, if so how is it possible as user2 dosent exist in db1!
i.e should i give command something like "grant select on user1.table to user2@db2"(this dosent work as it says user2@db2 dosent exist, obviously as its taking user2@db2 as a username in db1 schema)
or is this a problem with user2 priviliges in db2 database, if so what are all the priviliges that have to be given to user2 in db2 schema.
regards,

Hi,
User from db1 can not assign any privs to user on db2 database. If user from db1 want to access any object from db2 database, then on local level user2 on db2 should have all the acess to required object. Then you can use user2 on db2 using dblink from db1 user to access those objects residing on remote database.
If user1 from db1 can grant privs to user2 on db2 database on any objects on db2 database then it is highly security issue. This is not permitted.
Regards
e.g.
conn userx@db2
grant select on userx.table1 to user2;
conn user2@db2
select count(*) from userx.table1;
conn user1@db1
select count(*) from userx.table1@db2_dblink;
Edited by: skvaish1 on Apr 29, 2010 3:57 PM

Unable to create view links ....

Hi,
when i try to create a view link on my custom VO's ..im getting the following error:Ia m not using any standard VO's but still iam facing this issue
Error occurred trying to activate the wizard pageView objects.
Unable to find referenced object.
Object=oracle.apps.ego.common.server.EgoChangeOrderCreationVO
Owner=xxcus.apps.xo2c.sample.server.EgoChangeOrderCreationVOEx
Exception:oracle.jbo.dt.objects.jboReferenceException
I checked for these files on both the server and my local jdev.
only the PosShipmentsCustomVO.xml is present both on the server and my local jdev.the .class file is not there on the server.
Any help is greatly appreciated.
Thanks

Hello,
Check the developer's gude for the following:
Developing Business components -->Creating and modifying View Objects, view Links, Application Modules -->Ways to create View Link instances in the code.
Do let us know if you are still stuck some where.
Pavan K

Interactive report performance problem over database link - Oracle Gateway

Hello all;
This is regarding a thread Interactive report performance problem over database link that was posted by Samo.
The issue that I am facing is when I use Oracle function like (apex_item.check_box) the query slow down by 45 seconds.
query like this: (due to sensitivity issue, I can not disclose real table name)
SELECT apex_item.checkbox(1,b.col3)
, a.col1
, a.col2
FROM table_one a
, table_two b
WHERE a.col3 = 12345
AND a.col4 = 100
AND b.col5 = a.col5
table_one and table_two are remote tables (non-oracle) which are connected using Oracle Gateway.
Now if I run above queries without apex_item.checkbox function the query return or response is less than a second but if I have apex_item.checkbox then the query run more than 30 seconds. I have resolved the issues by creating a collection but it’s not a good practice.
I would like to get ideas from people how to resolve or speed-up the query?
Any idea how to use sub-factoring for the above scenario? Or others method (creating view or materialized view are not an option).
Thank you.
Shaun S.

Hi Shaun
Okay, I have a million questions (could you tell me if both tables are from the same remote source, it looks like they're possibly not?), but let's just try some things first.
By now you should understand the idea of what I termed 'sub-factoring' in a previous post. This is to do with using the WITH blah AS (SELECT... syntax. Now in most circumstances this 'materialises' the results of the inner select statement. This means that we 'get' the results then do something with them afterwards. It's a handy trick when dealing with remote sites as sometimes you want the remote database to do the work. The reason that I ask you to use the MATERIALIZE hint for testing is just to force this, in 99.99% of cases this can be removed later. Using the WITH statement is also handled differently to inline view like SELECT * FROM (SELECT... but the same result can be mimicked with a NO_MERGE hint.
Looking at your case I would be interested to see what the explain plan and results would be for something like the following two statements (sorry - you're going have to check them, it's late!)
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two),
sourceqry AS
(SELECT b.col3 x
       , a.col1 y
       , a.col2 z
FROM table_one a
    , table_two b
WHERE a.col3 = 12345
AND   a.col4 = 100
AND   b.col5 = a.col5)
SELECT apex_item.checkbox(1,x), y , z
FROM sourceqry
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two)
SELECT apex_item.checkbox(1,x), y , z
FROM table_one a
    , table_two b
WHERE a.col3 = 12345
AND   a.col4 = 100
AND   b.col5 = a.col5If the remote tables are at the same site, then you should have the same results. If they aren't you should get the same results but different to the original query.
We aren't being told the real cardinality of the inners select here so the explain plan is distorted (this is normal for queries on remote and especially non-oracle sites). This hinders tuning normally but I don't think this is your problem at all. How many distinct values do you normally get of the column aliased 'x' and how many rows are normally returned in total? Also how are you testing response times, in APEX, SQL Developer, Toad SQLplus etc?
Sorry for all the questions but it helps to answer the question, if I can.
Cheers
Ben
http://www.munkyben.wordpress.com
Don't forget to mark replies helpful or correct ;)

How to create text buttons that link to video?

I've finally gotten around to trying DVD SP, and even though I read the whole manual, it's not at all clear if, or how, you can create text buttons that link to the video you want to play, without displaying a clip of that video in the button itself.
I have no problem creating a text button, but I can't change the font, and editing is counter-intuitive, unlike iDVD. I'd use iDVD, but it doesn't accept .m2v files, and it seems to think that my 6 videos of about 43 minutes each are too large for a DVD+DL disc, so it won't let me burn it or save it as a disc image.
Does anyone have a way out of this conundrum, or am I SOL?
Mulder

It really isn't that hard!
As Drew said, go into your menu and click and drag to create a button rectangle. With the button highlighted, look in the property inspector at the bottom and type in the text that you want to use. Ensure that you 'include in button highlight' and then set the colour choice for selected and activated.
What you get is a simple line of text which illuminates when you roll over it, and changes colour when you click on it.
Once that is done, click on the button area again and set the target to go to the piece of video that you want to have play back.
You should also set the menu call and end jump on that track to make sure your viewer can get back to the menu.
Once that is done the menu will show as a simple piece of text (more buttons means more bits of text, and the first button will be highlighted by default) and no video will play until the button is activated.
DVDSP is definitely a steeper learning curve than iDVD but for very good reasons. You get far greater control and access to far more advanced features in DVDSP. This means that some things will seem harder, whereas in fact they are just different and the process for achieving the result you want is different. Much of what you want to know is in the manual and also in the tutorials which came with the app. Failing that there are several good online spaces where you can find a lot more information... not least of which is right here, of course!

Creating Views over DB links

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