Equivalent of null for CLOB in a view

Hi,
I am trying to create a view using union. One table has a column of CLOB type. The other table doesn't have this column so I am trying to select null like
select a_clob from a
union
select null from b
Its giving me an error "ORA-01790 expression must have the same datatype as corresponding expression".
Any help is greatly appreciated.
Regards,
Wasim.

Try this:
select a_clob from a
union
select empty_clob() from b;

Similar Messages

Equivalent of 'null' for integers?

I was wondering if the integer data type has a value that is the equivalent to 'null'?

yeah don't use 0 0 is a number null is nothing.
The best thing to do if you don't want it to be a
a NPE (NullPointerException) would be to do what was
suggested but use a negitive number (providing your
numbers are supposed to be positive).No.
Don't avoid null just to avoid NPE if null best represents what you're trying to do. Use null, test your code thoroughly to make sure that null is handled properly when it occurs (and "handling it properly" may mean throwing NPE--exceptions aren't evil), and document what null means and how it's handled so that users of your class can use it properly.

ORA-22835: Buffer too small for CLOB to CHAR on Solaris but not Windows

Hi,
I get the following error on Solaris but not Windows equivalent 10.2 installations
ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion (actual: 4575, maximum: 4000)
ORA-06512: at line 65
the code causing the problem is:
SELECT A.TABLE_NAME, A.DEFAULT_DIRECTORY_NAME, B.LOCATION,
CASE
WHEN INSTR(A.ACCESS_PARAMETERS,'RECORDS FIXED')<>0 THEN
SUBSTR(A.ACCESS_PARAMETERS,INSTR(A.ACCESS_PARAMETERS,'RECORDS FIXED')+14,3)
ELSE NULL
END RSZ FROM USER_EXTERNAL_TABLES A, USER_EXTERNAL_LOCATIONS B
WHERE A.TABLE_NAME = B.TABLE_NAME(+);
the entire code being executed is:
DECLARE
EX BOOLEAN;
CNT NUMBER;
SQL1 VARCHAR2(4000);
FLEN NUMBER;
BSIZE NUMBER;
TABNAME VARCHAR2(4000);
DEFDIR VARCHAR2(4000);
RSZ VARCHAR2(4000);
ECODE NUMBER(38);
ERRMSG VARCHAR2(4000);
CURSOR C1 IS
SELECT A.TABLE_NAME, A.DEFAULT_DIRECTORY_NAME, B.LOCATION,
CASE
WHEN INSTR(A.ACCESS_PARAMETERS,'RECORDS FIXED')<>0 THEN
SUBSTR(A.ACCESS_PARAMETERS,INSTR(A.ACCESS_PARAMETERS,'RECORDS FIXED')+14,3)
ELSE NULL
END RSZ FROM USER_EXTERNAL_TABLES A, USER_EXTERNAL_LOCATIONS B
WHERE A.TABLE_NAME = B.TABLE_NAME(+);
TYPE C1_TYPE IS TABLE OF C1%ROWTYPE;
REC1 C1_TYPE;
BEGIN
OPEN C1;
FETCH C1 BULK COLLECT INTO REC1;
FOR I IN REC1.FIRST .. REC1.LAST
LOOP
UTL_FILE.FGETATTR(NVL(REC1(I).DEFAULT_DIRECTORY_NAME,'CARDSLOAD'),
REC1(I).LOCATION, EX, FLEN, BSIZE);
IF EX THEN
IF INSTR(TO_CHAR(REC1(I).RSZ),'\.')<>0 THEN
     DBMS_OUTPUT.PUT_LINE('INVALID RECORDSIZE OR CORRUPTED FILE');
     END IF;
     DBMS_OUTPUT.PUT_LINE('Table Name: ' || TO_CHAR(REC1(I).TABLE_NAME));
DBMS_OUTPUT.PUT_LINE('File Exists '||REC1(I).LOCATION);
     DBMS_OUTPUT.PUT_LINE('File Length: ' || TO_CHAR(FLEN));
     DBMS_OUTPUT.PUT_LINE('Record Size: ' || TO_CHAR(REC1(I).RSZ));
DBMS_OUTPUT.PUT_LINE('Block Size: ' || TO_CHAR(BSIZE));
     DBMS_OUTPUT.PUT_LINE('# RECORDS: ' || FLEN/TO_NUMBER(REC1(I).RSZ));
     BEGIN
     CNT:='';
     SQL1:='SELECT COUNT(*) FROM '|| REC1(I).TABLE_NAME;
     EXECUTE IMMEDIATE SQL1 INTO CNT;
DBMS_OUTPUT.PUT_LINE('SELECT COUNT FOR: ' || REC1(I).TABLE_NAME||' = '||CNT);
     EXCEPTION
     WHEN OTHERS THEN
     DBMS_OUTPUT.PUT_LINE('SELECT COUNT FAILED FOR: ' || REC1(I).TABLE_NAME);
     ECODE := SQLCODE;
ERRMSG := SQLERRM;
DBMS_OUTPUT.PUT_LINE(ECODE||' '||ERRMSG);
     END;
ELSE
DBMS_OUTPUT.PUT_LINE(REC1(I).TABLE_NAME||' '||REC1(I).LOCATION||' File Does Not Exist');
END IF;
     DBMS_OUTPUT.PUT_LINE('-----------------------------------------------------');
END LOOP;
CLOSE C1;
EXCEPTION
WHEN OTHERS THEN RAISE;
END;
Any ideas why Solaris but not Windows would have this problem?
Thanks,
Victor

Check out Bug 4715104 - ORA-22835 / truncated data from USER/ALL/DBA_EXTERNAL_TABLES

Bad query plan for self-referencing CTE view query and variable in WHERE clause. Is there way out or this is SQL Server defect?

Please help. Thank you for your time and expertise.
Prerequisites: sql query needs to be a view. Real view is more than recursion. It computes location path, is used in JOINs and returns this path.
Problem: no matter what I tried, sql server does not produce 'index seek' when using variable but does with literal.
See full reproduction code below.
I expect that query SELECT lcCode FROM dbo.vwLocationCodes l WHERE l.lcID = @lcID will seek UNIQUE index but it does not.
I tried these:
1. Changing UX and/or PK to be CLUSTERED.
2. query OPTION(RECOMPILE)
3. FORCESEEK on view
4. SQL Server 2012/2014
5. Wrap it into function and CROSS APPLY. On large outer number of rows this just dies, no solution
but to no avail. This smells like a bug in SQL Server. I am seeking your confirmation.
I am thinking it is a bug as variable value is high-cardinality, 1, and query is against unique key. This must produce single seek, depending if clustered or nonclustred index is unique
Thanks
Vladimir
use tempdb
BEGIN TRAN
-- setup definition
CREATE TABLE dbo.LocationHierarchy(
lcID int NOT NULL ,
lcHID hierarchyid NOT NULL,
lcCode nvarchar(25) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
lcHIDParent AS lcHID.GetAncestor(1) PERSISTED,
CONSTRAINT PK_LocationHierarchy_lcID PRIMARY KEY NONCLUSTERED (lcID ASC),
CONSTRAINT UX_LocationHierarchy_pltID_lcHID UNIQUE CLUSTERED (lcHID ASC)
-- add some data
INSERT INTO dbo.LocationHierarchy
VALUES
(1, '/', 'A')
,(2, '/1/', 'B')
,(3, '/1/1/', 'C')
,(4, '/1/1/1/', 'D')
--DROP VIEW dbo.vwLocationCodes
GO
CREATE VIEW dbo.vwLocationCodes
AS
WITH ru AS
SELECT
lh.lcID
,lh.lcCode
,lh.lcHID
,CAST('/' + lh.lcCode + '/' as varchar(8000)) as LocationPath
-- to support recursion
,lh.lcHIDParent
FROM dbo.LocationHierarchy lh
UNION ALL
SELECT
ru.lcID
,ru.lcCode
,ru.lcHID
,CAST('/' + lh.lcCode + ru.LocationPath as varchar(8000)) as LocationPath
,lh.lcHIDParent
FROM dbo.LocationHierarchy lh
JOIN ru ON ru.lcHIDParent = lh.lcHID
SELECT
lh.lcID
,lh.lcCode
,lh.LocationPath
,lh.lcHID
FROM ru lh
WHERE lh.lcHIDParent IS NULL
GO
-- get data via view
SELECT
CONCAT(SPACE(l.lcHID.GetLevel() * 4), lcCode) as LocationIndented
FROM dbo.vwLocationCodes l
ORDER BY lcHID
GO
SET SHOWPLAN_XML ON
GO
DECLARE @lcID int = 2
-- I believe this produces bad plan and is defect in SQL Server optimizer.
-- variable value cardinality is 1 and SQL Server should know that. Optiomal plan is to do index seek with key lookup.
-- This does not happen.
SELECT lcCode FROM dbo.vwLocationCodes l WHERE l.lcID = @lcID -- bad plan
-- this is a plan I expect.
SELECT lcCode FROM dbo.vwLocationCodes l WHERE l.lcID = 2 -- good plan
-- I reviewed these but I need a view here, can't be SP
-- http://sqlblogcasts.com/blogs/tonyrogerson/archive/2008/05/17/non-recursive-common-table-expressions-performance-sucks-1-cte-self-join-cte-sub-query-inline-expansion.aspx
-- http://social.msdn.microsoft.com/Forums/sqlserver/en-US/22d2d580-0ff8-4a9b-b0d0-e6a8345062df/issue-with-select-using-a-recursive-cte-and-parameterizing-the-query?forum=transactsql
GO
SET SHOWPLAN_XML OFF
GO
ROLLBACK
Vladimir Moldovanenko

Here is more... note that I am creating table Items and these can be in Locations.
I am trying LEFT JOIN and OUTER APLLY to 'bend' query into NESTED LOOP and SEEK. There has to be nested loop, 2 rows against 4. But SQL Server fails to generate optimal plan with SEEK. Even RECOMPILE does not help
use tempdb
BEGIN TRAN
-- setup definition
CREATE TABLE dbo.LocationHierarchy(
lcID int NOT NULL ,
lcHID hierarchyid NOT NULL,
lcCode nvarchar(25) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
lcHIDParent AS lcHID.GetAncestor(1) PERSISTED,
CONSTRAINT PK_LocationHierarchy_lcID PRIMARY KEY NONCLUSTERED (lcID ASC),
CONSTRAINT UX_LocationHierarchy_pltID_lcHID UNIQUE CLUSTERED (lcHID ASC)
-- add some data
INSERT INTO dbo.LocationHierarchy
VALUES
(1, '/', 'A')
,(2, '/1/', 'B')
,(3, '/1/1/', 'C')
,(4, '/1/1/1/', 'D')
--DROP VIEW dbo.vwLocationCodes
GO
--DECLARE @Count int = 10;
--WITH L0 AS (SELECT N FROM (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N (N))-- 10 rows
--,L1 AS (SELECT n1.N FROM L0 n1 CROSS JOIN L0 n2) -- 100 rows
--,L2 AS (SELECT n1.N FROM L1 n1 CROSS JOIN L1 n2) -- 10,000 rows
--,L3 AS (SELECT n1.N FROM L2 n1 CROSS JOIN L2 n2) -- 100,000,000 rows
--,x AS
-- SELECT TOP (ISNULL(@Count, 0))
-- ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) as Number
-- FROM L3 n1
--SELECT Number as itmID, NTILE(4)OVER(ORDER BY Number) as lcID
--INTO dbo.Items
--FROM x
----ORDER BY n1.N
--ALTER TABLE dbo.Items ALTER COLUMN itmID INT NOT NULL
--ALTER TABLE dbo.Items ADD CONSTRAINT PK PRIMARY KEY CLUSTERED (itmID)
CREATE TABLE dbo.Items (itmID int NOT NULL PRIMARY KEY, lcID int NOT NULL)
INSERT INTO dbo.items
VALUES(1, 1)
,(2, 3)
GO
CREATE VIEW dbo.vwLocationCodes
AS
WITH ru AS
SELECT
lh.lcID
,lh.lcCode
,lh.lcHID
,CAST('/' + lh.lcCode + '/' as varchar(8000)) as LocationPath
-- to support recursion
,lh.lcHIDParent
FROM dbo.LocationHierarchy lh
UNION ALL
SELECT
ru.lcID
,ru.lcCode
,ru.lcHID
,CAST('/' + lh.lcCode + ru.LocationPath as varchar(8000)) as LocationPath
,lh.lcHIDParent
FROM dbo.LocationHierarchy lh
JOIN ru ON ru.lcHIDParent = lh.lcHID
SELECT
lh.lcID
,lh.lcCode
,lh.LocationPath
,lh.lcHID
FROM ru lh
WHERE lh.lcHIDParent IS NULL
GO
-- get data via view
SELECT
CONCAT(SPACE(l.lcHID.GetLevel() * 4), lcCode) as LocationIndented
FROM dbo.vwLocationCodes l
ORDER BY lcHID
GO
--SET SHOWPLAN_XML ON
GO
DECLARE @lcID int = 2
-- I believe this produces bad plan and is defect in SQL Server optimizer.
-- variable value cardinality is 1 and SQL Server should know that. Optiomal plan is to do index seek with key lookup.
-- This does not happen.
SELECT lcCode FROM dbo.vwLocationCodes l WHERE l.lcID = @lcID-- OPTION(RECOMPILE) -- bad plan
-- this is a plan I expect.
SELECT lcCode FROM dbo.vwLocationCodes l WHERE l.lcID = 2 -- good plan
SELECT *
FROM dbo.Items itm
LEFT JOIN dbo.vwLocationCodes l ON l.lcID = itm.lcID
OPTION(RECOMPILE)
SELECT *
FROM dbo.Items itm
OUTER APPLY
SELECT *
FROM dbo.vwLocationCodes l
WHERE l.lcID = itm.lcID
) l
-- I reviewed these but I need a view here, can't be SP
-- http://sqlblogcasts.com/blogs/tonyrogerson/archive/2008/05/17/non-recursive-common-table-expressions-performance-sucks-1-cte-self-join-cte-sub-query-inline-expansion.aspx
-- http://social.msdn.microsoft.com/Forums/sqlserver/en-US/22d2d580-0ff8-4a9b-b0d0-e6a8345062df/issue-with-select-using-a-recursive-cte-and-parameterizing-the-query?forum=transactsql
GO
--SET SHOWPLAN_XML OFF
GO
ROLLBACK
Vladimir Moldovanenko

Limitation for CLOB columns? - ORA-01704: string literal too long

Hello!
I'm trying to update a CLOB column with more than 35000 characteres, but I get "ORA-01704: string literal too long".
The code:
declare
l_clob clob;
begin
update test set test = empty_clob()
WHERE ID = 1
returning test into l_clob;
dbms_lob.write( l_clob, length('A...here 35000xA...A'), 1,'A...here 35000xA...A');
end;
Is there any limitation for CLOB columns?
Thanks for help.
Daniel

user605489 wrote:
32768 characteres :)Actually it's 1 character less than 32K...
*32767*
SQL> declare
2 v_vc varchar2(32768);
3 begin
4 null;
5 end;
6 /
v_vc varchar2(32768);
ERROR at line 2:
ORA-06550: line 2, column 17:
PLS-00215: String length constraints must be in range (1 .. 32767)
SQL>I guess it comes from a legacy thing where signed words (2 bytes) are/were used to represent a value. As the most significant bit of the word is used to represent the sign of the number the range goes from -32768 to 32767.

ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion

Hi all,
the following query select to_char(nvl(round(pc.target_cost*xx_primavera.geteurtolvrate,2),amount),'FM999G999G999G999G990D00') detail_amount,
nvl(ct.cost_type, description) detail_description,
tm_desc.memo_id,
primavera_prj_name detail_prj_name,
hp.party_number detail_party_number,
xpid.interface_line_attribute1,
utl_i18n.unescape_reference(replace(regexp_replace(utl_raw.cast_to_varchar2(tm_desc.task_memo), '<[^>]*>'), chr(13)||chr(10))) document_description,
REPLACE(regexp_replace(utl_raw.cast_to_varchar2(tm_id.task_memo), '<[^>]*>'), chr(13)||chr(10)) prim_memo_client_id
from XX_PRIMAVERA_INVOICES_DETAIL xpid
join admuser.xx_ar_hz_parties xahp on xahp.orig_system_bill_customer_id = xpid.orig_system_bill_customer_id
join hz_parties hp on hp.party_id = xahp.party_id
left join admuser.projcost pc on pc.proj_id = xpid.primavera_prj_id and pc.cost_type_id != 29 and xpid.service_code = 8 and pc.task_id = xx_primavera.getTaskId(xpid.primavera_prj_id,'A1020', 'Изготвяне на оферта') and delete_session_id is null
left join admuser.costtype ct on ct.cost_type_id = pc.cost_type_id
left join admuser.taskmemo tm_id on tm_id.proj_id = xpid.primavera_prj_id and tm_id.memo_type_id = 53 and tm_id.task_id = xx_primavera.getTaskId(xpid.primavera_prj_id,'A1020', 'Изготвяне на оферта')
left join admuser.taskmemo tm_desc on tm_desc.proj_id = xpid.primavera_prj_id and tm_desc.memo_type_id = 55 and tm_desc.task_id = xx_primavera.getTaskId(xpid.primavera_prj_id,'A1020', 'Изготвяне на оферта')
where amount != 0
and xpid.interface_line_attribute1 = :ra_ctp_attribute1
ORDER BY xpid.primavera_prj_name, xpid.description;returns error:
ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion (actual: 2371, maximum: 2000) I found that the error occurs in the row : utl_i18n.unescape_reference(replace(regexp_replace(utl_raw.cast_to_varchar2(tm_desc.task_memo), '<[^>]*>'), chr(13)||chr(10))) document_description,and tried to change it to: utl_i18n.unescape_reference(replace(regexp_replace(utl_raw.cast_to_varchar2(dbms_lob.substr(tm_desc.task_memo,1,2000)), '<[^>]*>'), chr(13)||chr(10))) document_description,....but it returns not value for that field... am i using dbms_lob.substr at the wrong place? The column 'tm_desc.task_memo' is BLOB type.
Any ideas how to cheat it ?
Version: Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
PL/SQL Release 11.1.0.7.0 - Production
"CORE     11.1.0.7.0     Production"
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - ProductionThanks in advance,
Bahchevanov.

Your second example has the parameters reversed. The amount (length) comes first and then the offset:
DBMS_LOB.SUBSTR (
   lob_loc     IN    BLOB,
   amount      IN    INTEGER := 32767,
   offset      IN    INTEGER := 1)
RETURN RAW;
DBMS_LOB.SUBSTR (
   lob_loc     IN    CLOB   CHARACTER SET ANY_CS,
   amount      IN    INTEGER := 32767,
   offset      IN    INTEGER := 1)
RETURN VARCHAR2 CHARACTER SET lob_loc%CHARSET;
DBMS_LOB.SUBSTR (
   file_loc     IN    BFILE,
   amount      IN    INTEGER := 32767,
   offset      IN    INTEGER := 1)
RETURN RAW;Also, remember that # of bytes is not necessarily the same as the # of characters depending on your character set. So 2000 bytes might become 4000 characters. And you have to make sure the BLOB is actually character data and not arbitrary binary data.
Post the results of reversing the parameters and using a smaller chunk size.

Comparison for clob type

Hi All,
Can Anyone please tell how to compare clob type in select query with where condition ?
Ex: field: Desc_ short(Clob )
field ean_code(number,pk)
And i want to see those ean_code list matching to particullar clob pattern matching in the record in any where in the record.
Please help.
Thanks and regards,
DK.

COMPARE function
This function compares two entire LOBs or parts of two LOBs. You can only compare LOBs of the same datatype (LOBs of BLOB type with other BLOBs, and CLOBs with CLOBs, and BFILEs with BFILEs). For BFILEs, the file must be already opened using a successful FILEOPEN operation for this operation to succeed.
COMPARE returns zero if the data exactly matches over the range specified by the offset and amount parameters. Otherwise, a non-zero INTEGER is returned.
For fixed-width n-byte CLOBs, if the input amount for COMPARE is specified to be greater than (4294967295/n), then COMPARE matches characters in a range of size (4294967295/n), or Max(length(clob1), length(clob2)), whichever is lesser.
Syntax
DBMS_LOB.COMPARE (
   lob_1            IN BLOB,
   lob_2            IN BLOB,
   amount           IN INTEGER := 4294967295,
   offset_1         IN INTEGER := 1,
   offset_2         IN INTEGER := 1)
RETURN INTEGER;
DBMS_LOB.COMPARE (
   lob_1            IN CLOB CHARACTER SET ANY_CS,
   lob_2            IN CLOB CHARACTER SET lob_1%CHARSET,
   amount           IN INTEGER := 4294967295,
   offset_1         IN INTEGER := 1,
   offset_2         IN INTEGER := 1)
RETURN INTEGER;
DBMS_LOB.COMPARE (
   lob_1            IN BFILE,
   lob_2            IN BFILE,
   amount           IN INTEGER,
   offset_1         IN INTEGER := 1,
   offset_2         IN INTEGER := 1)
RETURN INTEGER;
Pragmas
pragma restrict_references(COMPARE, WNDS, WNPS, RNDS, RNPS);
Parameters
Table 17-7 COMPARE Function Parameters
Parameter Description
lob_1        LOB locator of first target for comparison.
lob_2        LOB locator of second target for comparison.
amount Number of bytes (for BLOBs) or characters (for CLOBs) to compare.
offset_1 Offset in bytes or characters on the first LOB (origin: 1) for the comparison.
offset_2 Offset in bytes or characters on the first LOB (origin: 1) for the comparison.
Returns
INTEGER: Zero if the comparison succeeds, non-zero if not.
NULL, if
amount < 1
amount > LOBMAXSIZE
offset_1 or offset_2 < 1
offset_1 or offset_2 > LOBMAXSIZE
Exceptions
Table 17-8 COMPARE Function Exceptions for BFILE operations
Exception Description
UNOPENED_FILE
File was not opened using the input locator.
NOEXIST_DIRECTORY
Directory does not exist.
NOPRIV_DIRECTORY
You do not have privileges for the directory.
INVALID_DIRECTORY
Directory has been invalidated after the file was opened.
INVALID_OPERATION
File does not exist, or you do not have access privileges on the file.
http://www.java2s.com/Code/Oracle/System-Packages/Usedbmslobcomparetocompare.htm

Operation hasNext is invalid for a working set view object

Can someone point me to soem documentation to why I'm getting this error? I'm obviously misunderstanding something fundamental.
Thanks

I have an application module with a client method as follows:
public void setUserCredentials(String username, String password)
UserAccountViewImpl vo = getUserAccountView1();
vo.setWhereClauseParam(0, username);
vo.setWhereClauseParam(1, password);
vo.executeQuery();
if (vo.hasNext()) (BREAK POINT TWO)
vo.next();
I have a struts action that is based on the BasicADFAction class in the tech paper "Oracle ADF Data Binding Primer and ADF/Struts Overview"
by Steve Muench.
public class IsLoginValidAction extends BasicADFAction
protected ActionForward performActionLogic(ActionMapping mapping,
ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception
.... other code that gets username and password from form
DatamartModule am = (DatamartModule)getApplicationModule("DatamartModuleDataControl", request);
am.setUserCredentials(username, password);
ViewObject vo = am.findViewObject("UserAccountView1");
if (vo.getCurrentRow() == null) -- BREAK POINT ONE
ae.add("InvalidDetails", new ActionError("error.IsLoginValidAction.InvalidDetails"));
return mapping.findForward("LoginError");
UserAccountViewRowClient vr = (UserAccountViewRowClient)vo.getCurrentRow();
.... do some other checks with the user account
As you can see the above Action calls setUserCredentials(). What is driving me mad is the following. If I enter a valid username and password in the login page and reach break point one the method vo.getCurrentRow() returns null which is not what I expect!
If I re-submit my login details again, when I reach break point one for the second time vo.getCurrentRow() is not null??
I have also set a break point two just to make sure setUserCredentials is working and it always brings back a row when I enter the correct details. So why in the action when I select the same view object the current row is not available to me but is available the second time round?? I'm I missing something fundamental??
I had some feedback on metalink where oracle support set check that the vo.isExecuted() == true and if it isn't then re-execute the query. I couldn't see why I should do this but I did. I found that vo.isExecuted is false the first time round but true the second time. It appears the first time round I am implicitly getting the query to execute for the first time even though I believe I have already done this in the setUserCredentials method.
After adding a vo.executeQuery() I obviously needed to add code that obtained the row. As soon as vo.hasNext() is called I get:
oracle.jbo.InvalidOperException: JBO-25048: Operation hasNext is invalid for a working set view object.
     at oracle.jbo.common.ws.WSObject.invalidOperation(WSObject.java:44)
     at oracle.jbo.common.ws.WSRowSetIteratorBase.hasNext(WSRowSetIteratorBase.java:381)
     at view.IsLoginValidAction.performActionLogic(IsLoginValidAction.java:66)
     at view.BasicADFAction.handleLifecycle(BasicADFAction.java:64)
     at view.BasicADFAction.execute(BasicADFAction.java:46)
     at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
     at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
     at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
     at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(Unknown Source)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:228)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:600)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:317)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
I must misunderstand something fundamental. Any help would be really appreciated. Basically in my client code (The struts action) I want to access a single record that is based on a view. I prepare the view object by calling a custom service level method to set the username and password and execute the query.

Portlet bindings are null for portlet component portlet1

I have 2 simple portlets on a Web Center page.
I've added these at design time - the source JSPX shows
<adfp:portlet value="#{bindings.Portlet41_1}" id="portlet1"/>
It does not populate the required attribute portletType when I add this.
The page definition file shows
<portlet id="Portlet41_1"
portletInstance="/oracle/adf/portlet/MyPortlets/ap/Enportlet4default_c5eb69ff_012d_1000_8001_0a033796cd43"
class="oracle.adf.model.portlet.binding.PortletBinding"
retainPortletHeader="false"
xmlns="http://xmlns.oracle.com/portlet/bindings"/>
But at runtime, the page throws this exception
<WCS-39264> <Portlet bindings are null for portlet component portlet1.>
Am I missing an entry in any file?

Yannick - I have tried that exact sequence you've described. This is as per the tutorial.
It works intermittently when added via Design time - on some occasions - it gives the "Portlet bindings are null for portlet component portlet1" error. Other times, it shows the Hello World correctly.
When I see the error on screen, there is no stacktrace in the logs. I restart and it may (or may not) go away. Sorry - I dont have more pinpoint info than this.
My code is as in the first post - dragged and dropped ADFportlet from WSRP Producer, and the basic bindings were generated.
Now if added at runtime - it shows me the correct portlets via the Resource Catalog.
When I try to add, it just hangs for a very long time, without adding the portlet into the PanelCustomizable.
It adds other ADF components like Textbox properly
If I try Adding the portlet, or Adding a box below the panel or any operations more than once it gives this error
<00e884cc3b492be0:702f695:12dcc9dc37d:-8000-0000000000000197> <1296219641236> <BEA-000000> <Server Exception during PPR, #1
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/xpath/jaxp/JAXPPrefixResolver
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:341)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.portlet.client.adapter.adf.ADFPortletFilter.doFilter(ADFPortletFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:191)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:97)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
     at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:247)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:157)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:94)
     at java.security.AccessController.doPrivileged(Native Method)
     at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
     at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:414)
     at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:138)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at com.bea.content.manager.servlets.ContentServletFilter.doFilter(ContentServletFilter.java:178)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.webcenter.lifecycle.filter.LifecycleLockFilter.doFilter(LifecycleLockFilter.java:149)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:159)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.dms.wls.DMSServletFilter.doFilter(DMSServletFilter.java:330)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.doIt(WebAppServletContext.java:3684)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3650)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2268)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2174)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1446)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused By: java.lang.NoClassDefFoundError: org/apache/xpath/jaxp/JAXPPrefixResolver
     at org.apache.xpath.jaxp.XPathImpl.setNamespaceContext(XPathImpl.java:142)
     at oracle.mds.internal.model.dom.DOMModelDocument.evaluateXPath(DOMModelDocument.java:914)
     at oracle.mds.internal.model.dom.DOMModelDocument.findElement(DOMModelDocument.java:674)
     at oracle.mds.internal.model.AbstractImmutableModelDocument.findNodes(AbstractImmutableModelDocument.java:105)
     at oracle.mds.internal.model.parse.InsertCustNodeParser.startElement(InsertCustNodeParser.java:391)
     at oracle.mds.internal.parsefwk.TreeBuilder$Handler.startElement(TreeBuilder.java:298)
     at oracle.xml.parser.v2.NonValidatingParser.parseElement(NonValidatingParser.java:1328)
     at oracle.xml.parser.v2.NonValidatingParser.parseRootElement(NonValidatingParser.java:375)
     at oracle.xml.parser.v2.NonValidatingParser.parseDocument(NonValidatingParser.java:321)
     at oracle.xml.parser.v2.XMLParser.parse(XMLParser.java:226)
     at oracle.mds.internal.parsefwk.TreeBuilder.parse(TreeBuilder.java:143)
     at oracle.mds.internal.parsefwk.TreeBuilder.parse(TreeBuilder.java:105)
     at oracle.mds.internal.model.parse.SAXParserUtils.parse(SAXParserUtils.java:479)
     at oracle.mds.internal.model.parse.SAXParserUtils.parse(SAXParserUtils.java:419)
     at oracle.mds.internal.model.parse.SAXParserUtils.parseCustomizationDocument(SAXParserUtils.java:155)
     at oracle.mds.internal.model.CustDocBuilder.executeInternal(CustDocBuilder.java:320)
     at oracle.mds.internal.model.CustDocBuilder.execute(CustDocBuilder.java:145)
     at oracle.mds.internal.model.ContentModelPipeline.processPipeline(ContentModelPipeline.java:259)
     at oracle.mds.core.MOContent.fetchContent(MOContent.java:502)
     at oracle.mds.core.CachedMOContent.fetchContent(CachedMOContent.java:249)
     at oracle.mds.core.ChainedMOContent.fetchContent(ChainedMOContent.java:372)
     at oracle.mds.core.MOContent.getDocumentFromPipeline(MOContent.java:742)
     at oracle.mds.core.MOContent.getDocument(MOContent.java:659)
     at oracle.mds.core.MetadataObject.getContentWithRetry(MetadataObject.java:1772)
     at oracle.mds.core.MetadataObject.getDocument(MetadataObject.java:393)
     at oracle.mds.core.MetadataObject.getDocument(MetadataObject.java:341)
     at oracle.adfinternal.view.page.editor.utils.ComponentUtils._getDocument(ComponentUtils.java:1046)
     at oracle.adfinternal.view.page.editor.utils.ComponentUtils.isAutoRepeatComponent(ComponentUtils.java:742)
     at oracle.adfinternal.view.page.editor.security.AutoRepeatComponentPolicy.isCustomizable(AutoRepeatComponentPolicy.java:85)
     at oracle.adfinternal.view.page.editor.security.ComponentPolicyProviderImpl.isCustomizable(ComponentPolicyProviderImpl.java:97)
     at oracle.adfinternal.view.page.editor.renderkit.LayoutCustomizableRenderer.hasChangeLayoutPrivilege(LayoutCustomizableRenderer.java:1097)
     at oracle.adfinternal.view.page.editor.renderkit.LayoutCustomizableRenderer.encodeAll(LayoutCustomizableRenderer.java:254)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:405)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$300(PanelGroupLayoutRenderer.java:30)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:654)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:573)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:170)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:290)
     at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:255)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:330)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at oracle.adf.view.rich.render.RichRenderer.encodeStretchedChild(RichRenderer.java:1963)
     at oracle.adfinternal.view.page.editor.renderkit.PageCustomizableRenderer.encodeAll(PageCustomizableRenderer.java:423)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:405)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$300(PanelGroupLayoutRenderer.java:30)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:654)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:573)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:170)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:290)
     at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:255)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:330)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at oracle.adf.view.rich.render.RichRenderer.encodeStretchedChild(RichRenderer.java:1963)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelSplitterRenderer._renderPane(PanelSplitterRenderer.java:1044)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelSplitterRenderer._renderSecondPane(PanelSplitterRenderer.java:943)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelSplitterRenderer.encodeAll(PanelSplitterRenderer.java:197)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:432)
     at oracle.adfinternal.view.faces.renderkit.rich.FormRenderer.encodeAll(FormRenderer.java:220)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:432)
     at oracle.adfinternal.view.faces.renderkit.rich.DocumentRenderer.encodeAll(DocumentRenderer.java:1071)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.__encodeRecursive(UIXComponentBase.java:1515)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeAll(UIXComponentBase.java:785)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:942)
     at com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:271)
     at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:202)
     at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:189)
     at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:193)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:710)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:273)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:205)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.portlet.client.adapter.adf.ADFPortletFilter.doFilter(ADFPortletFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:191)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:97)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
     at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:247)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:157)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:94)
     at java.security.AccessController.doPrivileged(Native Method)
     at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
     at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:414)
     at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:138)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at com.bea.content.manager.servlets.ContentServletFilter.doFilter(ContentServletFilter.java:178)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.webcenter.lifecycle.filter.LifecycleLockFilter.doFilter(LifecycleLockFilter.java:149)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:159)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.dms.wls.DMSServletFilter.doFilter(DMSServletFilter.java:330)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.doIt(WebAppServletContext.java:3684)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3650)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2268)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2174)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1446)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

NullPointerException:Portlet bindings are null for portlet component portle

Hi , I am new to Webcenter, after depoying portlet on weblogic using Jdeveloper, while accessing the url i am facing the following error,
Any help appreciated.
java.lang.NullPointerException: Portlet bindings are null for portlet component portlet1.
at oracle.adf.view.rich.component.portlet.PortletBase.getPortletBinding(PortletBase.java:577)
at oracle.adf.view.rich.component.portlet.PortletBase.getPortletModel(PortletBase.java:599)
at oracle.adfinternal.view.faces.taglib.portlet.CorePortletTag.doStartTag(CorePortletTag.java:669)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspIterationTagNode.executeHandler(OracleJspIterationTagNode.java:45)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspNode.execute(OracleJspNode.java:89)
at oracle.jsp.runtimev2.ShortCutServlet._jspService(ShortCutServlet.java:89)
at oracle.jsp.runtime.OracleJspBase.service(OracleJspBase.java:29)
at oracle.jsp.runtimev2.JspPageTable.compileAndServe(JspPageTable.java:665)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:385)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:802)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:726)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:524)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:253)
at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:410)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at oracle.adfinternal.view.faces.config.rich.RecordRequestAttributesDuringDispatch.dispatch(RecordRequestAttributesDuringDispatch.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidadinternal.context.FacesContextFactoryImpl$OverrideDispatch.dispatch(FacesContextFactoryImpl.java:267)
at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:469)
at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:140)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:189)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:193)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:800)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:294)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:214)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.

Hi , I am new to Webcenter, after depoying portlet on weblogic using Jdeveloper, while accessing the url i am facing the following error,
Any help appreciated.
java.lang.NullPointerException: Portlet bindings are null for portlet component portlet1.
at oracle.adf.view.rich.component.portlet.PortletBase.getPortletBinding(PortletBase.java:577)
at oracle.adf.view.rich.component.portlet.PortletBase.getPortletModel(PortletBase.java:599)
at oracle.adfinternal.view.faces.taglib.portlet.CorePortletTag.doStartTag(CorePortletTag.java:669)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspIterationTagNode.executeHandler(OracleJspIterationTagNode.java:45)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspClassicTagNode.evalBody(OracleJspClassicTagNode.java:87)
at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:58)
at oracle.jsp.runtime.tree.OracleJspCustomTagNode.execute(OracleJspCustomTagNode.java:261)
at oracle.jsp.runtime.tree.OracleJspNode.execute(OracleJspNode.java:89)
at oracle.jsp.runtimev2.ShortCutServlet._jspService(ShortCutServlet.java:89)
at oracle.jsp.runtime.OracleJspBase.service(OracleJspBase.java:29)
at oracle.jsp.runtimev2.JspPageTable.compileAndServe(JspPageTable.java:665)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:385)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:802)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:726)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:524)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:253)
at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:410)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at oracle.adfinternal.view.faces.config.rich.RecordRequestAttributesDuringDispatch.dispatch(RecordRequestAttributesDuringDispatch.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44)
at org.apache.myfaces.trinidadinternal.context.FacesContextFactoryImpl$OverrideDispatch.dispatch(FacesContextFactoryImpl.java:267)
at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:469)
at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:140)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:189)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:193)
at oracle.webcenter.portalframework.sitestructure.handler.CustomViewHandler.renderView(CustomViewHandler.java:279)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:800)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:294)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:214)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.

NULL vs NOT NULL for end effectivity

I am working on a data model that needs to keep track of the properties of a company asset as of certain dates. In short my table looks like this:
(loc is a FK but for this example i made it more legible)
create table assets
asset_id     number,
asset_no     number,
loc          varchar2(20),
eff_start_dt date,
eff_end_dt   date
asset_id asset_no loc         eff_start_dt eff_end_dt
1         1         san diego   10-may-09     13-may-09
2         1         los angeles 13-may-09     14-may-09
3         1         sacromento 14-may-09     null
4         2         san diego   10-may-09     19-may-09
5         2         bakersfield 19-may-09     nullLong story short there was a debate on weather or not the "eff_end_dt" should be null for the current location or if it should be some predetermined date far off into the future like 01-JAN-99. Is one method truly better than the other or should we just pick one and write our queries accordingly.
Cheers,
Tyson Jouglet

Not trying to be the devil's advocate, as I agree on using nulls to represent unknown values, still some authors like CJ Date and others say that using nulls should be avoided. Much of that is based on relational theory though, and in practical real life it becomes much harder to make your data model (and your application) null-proof. Better live with it in my opinion, since SQL and relational databases rely on it. One just has to know how to deal with null properly.
http://www.dcs.warwick.ac.uk/~hugh/TTM/Missing-info-without-nulls.pdf
http://www.snopes.com/autos/law/noplate.asp
http://tkyte.blogspot.com/2009/10/back-from-oracle-openworld.html

Why "null" value is impossible in "switch(val) {case null: }" for enums?

I'm wondering why Java 5.0 does not allow null values
as options in switch statement:
If type E is "enum" then the following language construction is
not allowed:
E val;
switch(val) {
   case A:
     break;
   case B:
       break;
   case null:   // this is not allowed
        break;
}Can somebody explain me why Java does not support it? I beleave that
some serious reasons were for that.
As we know enum types can have "null" values and in case I use nulls
for my enumerations the code with "switch" statement becomes quite urgly because it is necessary to handle 2 separate execution paths:
null and not null.
Thanks

I really don�t know too much about 1.5, but I can tell you that for 1.4 the switch receives as a parameter an int or anything that can be casted automatically to an int. Therefore you can�t never use null cause int, char, short, byte can�t never take as a value null.

How to set printersettings for the crystal report viewer in SAP BI dynamically

Hello
I have set the URL method for my crystal report and with parameter passing as shown below, it was displaying the crystal report viewer by connecting to the SAP BI 4.0 server with this method.
http://cr:port/businessobjects/enterprise115/desktoplaunch/opendoc/openDocument.jsp?sDocName=CRLabelParam&sType=rpt&lsSnPrinted=0&lsSsTestProjectNr=1
This URL will be called from Web application by different users, i would like to set the printer settings differently for different users for this crystal report viewer how shall i need to set the printer options?
shall i need to set the printer settings programatically for each user. Please advise me how do i need to proceed.
Thanks & Regards,
Rajeswari.

There are no BI / CR APIs that would do this for you. The way I see it, you'll have to have your own print button and populate it with the correct printer information for each user as they request the report. Of course, alternatively, use the viewer printer button and get the users to choose the correct printer.
- Ludek
Senior Support Engineer AGS Product Support, Global Support Center Canada
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SQLloder scripts not getting generated for CLOBs

I am trying to migrate MYSQL 3.23 database into Oracle 8.1.7 and after creating the Oracle model and after converting the MYSQL text datatype into CLOB of the Oracle model the SQLloader scripts is not getting generated for CLOB datatypes. I mean the scripts are getting created but there is no change in the script for CLOB datatype.
The script generates the following for the table containing CLOB datatypes:
mysqldump -h <HOST> -u <USERNAME> -p<PASSWORD> -T <DESTINATION_PATH> fields-terminated-by="<ec>" lines-terminated-by="<er>" test av_wbt_course
Please let me know how to load data when the datatype is of CLOB ?

I was able to resolve this issue by using OWM Oracle Migration instead of using offline method by sqlloader scripts.

Using MISSING FIELD VALUES ARE NULL for external table

I want to place a null for values missing in the sub_account field. Here is my external table:
CREATE OR REPLACE DIRECTORY INCOMING_ORDERS_log_dir
AS 'c:\starpubs\starpubs\dataformats\logs\INCOMING_ORDERS\log';
CREATE OR REPLACE DIRECTORY INCOMING_ORDERS_bad_dir
AS 'c:\starpubs\starpubs\dataformats\logs\INCOMING_ORDERS\bad';
create table ext_INCOMING_ORDERS_table (
Account varchar(5),
Sub_Account varchar(1),
Override_Code varchar(1),
Nomenclature varchar(28),
chg_nbr varchar(3),
quantity integer,
U_I varchar(5),
zipcode varchar(5),
type_reject varchar(2)
organization external
type oracle_loader
default directory user_dir
access parameters
records delimited by newline
missing field values are null
badfile INCOMING_ORDERS_bad_dir:'INCOMING_ORDERS%a_%p.bad'
logfile INCOMING_ORDERS_log_dir:'INCOMING_ORDERS%a_%p.log'
fields
Account(1:5) char(5),
Sub_Account(7:7) char(1),
Override_Code(10:10) char(1),
Nomenclature(11:38) char(28),
chg_nbr(40:42) char(3),
quantity(44:48) integer external,
U_I(50:54) char(5),
zipcode(56:60) char(5),
type_reject(61:62) char(2)
location('PTCLICK.MANUAL.NOMEN.TXT','PTCLICK.ORDERS.TXT', 'EUR_RES.TXT', 'MQ.TXT', 'BPRO.TXT')
reject limit unlimited;
How can I place the MISSING FIELD VALUES ARE NULL for missing values for the sub_account?

made the change I received this error:
SQL> select * from ext_INCOMING_ORDERS_table;
select * from ext_INCOMING_ORDERS_table
ERROR at line 1:
ORA-29913: error in executing ODCIEXTTABLEOPEN callout
ORA-29400: data cartridge error
KUP-00554: error encountered while parsing access parameters
KUP-01005: syntax error: found "no": expecting one of: "comma, date_format,
defaultif, enclosed, ltrim, lrtrim, ldrtrim, notrim, nullif, optionally, ),
rtrim, terminated"
KUP-01007: at line 7 column 26
CREATE OR REPLACE DIRECTORY INCOMING_ORDERS_log_dir
AS 'c:\starpubs\starpubs\dataformats\logs\INCOMING_ORDERS\log';
CREATE OR REPLACE DIRECTORY INCOMING_ORDERS_bad_dir
AS 'c:\starpubs\starpubs\dataformats\logs\INCOMING_ORDERS\bad';
create table ext_INCOMING_ORDERS_table (
Account varchar(5),
Sub_Account varchar(1),
Override_Code varchar(1),
Nomenclature varchar(28),
chg_nbr varchar(3),
quantity integer,
U_I varchar(5),
zipcode varchar(5),
type_reject varchar(2)
organization external
type oracle_loader
default directory user_dir
access parameters
records delimited by newline
badfile INCOMING_ORDERS_bad_dir:'INCOMING_ORDERS%a_%p.bad'
logfile INCOMING_ORDERS_log_dir:'INCOMING_ORDERS%a_%p.log'
fields
Account(1:5) char(5),
Sub_Account(7:7) char(1) NO PRESERVE BLANKS,
Override_Code(10:10) char(1),
Nomenclature(11:38) char(28),
chg_nbr(40:42) char(3),
quantity(44:48) integer external,
U_I(50:54) char(5),
zipcode(56:60) char(5),
type_reject(61:62) char(2)
location('PTCLICK.MANUAL.NOMEN.TXT','PTCLICK.ORDERS.TXT', 'EUR_RES.TXT', 'MQ.TXT', 'BPRO.TXT')
reject limit unlimited;

Equivalent of null for CLOB in a view

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