Mediator exception handling when no data found in database

hi Guys,
I am using DB adapter in a composite and using a mediator to invoke them, however not getting how to send the response back,
in case there is NO_DATA_FOUND error.
waiting for response
thanks
Yatan

Yatan
As far as i know a DB adapter will not throw no_data_found exception if it is not able to get rows from database it will just initialize the output variable with null. But yes in case of call to procedure or function it may cause that you should handle then and there only.
Let us know what exactly is the issue you are facing.
Thanks
AJ

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Collapsed Tabular Form Heading when "No data found".

The ' Collapsed Tabular Form Heading when "No data found" ' problem (speculated to be bug 9893564) is discussed here: {message:id=4419231}. Warning link is out of date. I'm still seeing it in APEX 4.2.
I support Kelly's comments "looks like something is broken" and "Now this header (which is sized smaller before data is retrieved) comes between the search items and the help message and looks clumsy.".{message:id=9185914}.
Any suggestion to get around it when no data is found?
1) Is there a way to hide the header when there is no data? Or,
2) Is there a way to adjust the width of the columns if the header must display? I'd like them to be about what they are when data is displayed. I know those lengths but not how to affect the header width for a tabular report with no data.
Example:
WS APEX_EXAMPLES_01
demo
demo
Appl 78329 Tabular Form - page 1. (I forced query not to find any data for demo purposes.)
Thanks,
Howard

Howard (... in Training) wrote:
Paul --
Great! So many new techniques here -- new to me. Generally, I much prefer positive logic as well. But this solution seems to have more pieces than the other.There is method in that.
Firstly, with Aljaz's approach you can see a flicker as the tabular form is actually rendered and then hidden when the script in the footer is eventually run. This will be more apparent with a longer or more complicated page where it takes longer to reach the script and more content needs to be adjusted following removal of the form. Reversing the logic and hiding the form using CSS in the page header prevents this as the form elements are initially created as hidden nodes in the DOM before any of the page is rendered.
More important is that this approach applies the principles of the separation of concerns and unobtrusive JavaScript. At some point when developing in APEX you're going to find yourself seriously losing your cool in a situation where you know the app is executing some JavaScript, but you can't find where that script is defined (maybe you've already been there). Look at the page 2 definition using the tree view: where's the JavaScript that is going to run? Now look at page 1: ah, there are a couple of dynamic actions...
APEX now includes a lot of containers specifically for JavaScript: File URLs, Function and Global Variable Declaration and Execute when Page Loads in page templates and page headers, and declarative and custom Execute JS Code Dynamic Actions. These provide for good separation of concerns: we should use these locations for JS code, and avoid the exasperation of hunting through templates, page/region headers/footers, page 0 regions, pre-/post-element text or wherever to find the script we can see in the page source or JS debugger.
Aljaz's solution also depends on detecting the presence of the No Data Found message with class <tt>nodatafound</tt>, and on modifying the Add Row button.
What if someone changes the class of the No Data Found message in the report attributes? The Exists... condition on the dynamic action performs this check in a more direct way (although it's not ideal: DRY is violated by having both 2 copies and 2 executions of the report SQL; nor is it reusable on other form regions).
Modifying the Add Row button JavaScript directly is intrusive. Like footers and templates, it's another non-obvious location for JS customisation. By using a dynamic action to bind another click handler to the button we're making the modification more obvious, and more importantly we don't have to modify what it's already doing—or in this instance, even care what that is (in other circumstances we might need to change the order or propagation of events, or suppress the original behaviour).
As for reusability, my original solution didn't really consider this (as it wasn't mentioned in the OP). Since the subject has been raised, and in accordance with my comments above, I'd approach it in a different way.
As discussed, I suggest not squirrelling JavaScript away in region templates. I'd create a reusable report template for tabular forms rather than a region one. A <tt>class</tt> defined on the report container there will provide a more direct selector for hide/show behaviour. I'd stick to initially hiding this report via CSS, and use dynamic actions defined on the global page to conditionally show it on page load and bind show behaviour to the Add Row button click. To make these DAs reusable I'd remove the Exists... condition from the first one and replace it with a JS condition that checks to see if the tabular form report contains any visible data rows (the class on the report template will help there as well). Binding the show behaviour to the Add Row button would use the <tt>onclick</tt> attribute as a selector (rather than an ID selector that requires an intrusive edit of the button) so that all Add Row buttons would be affected: <tt>$('button[onclick^="apex.widget.tabular.addRow"]')</tt>.
And about the style code:
#report_tabular-form,
#report_tabular-form .report-standard {
min-width: 90%;
} That is an improvement. I had read about it but not considered it for this. I tried the technique used to adjust column width on other reports but when I use "div," it makes the data in that column display only. I really want to adjust the width of the individual column header. Is there a way to do that?I'm not really clear what you're asking here. (Use "div"? Where? How?)
To control the width of individual report column headers, use the following CSS:
th#COLUMN_ALIAS {
width: 10em;
}Where <tt>COLUMN_ALIAS</tt> is the alias of the column in the query: APEX uses this as the HTML <tt>id</tt> attribute for the column table header element. (Note that <tt>id</tt> attributes must be unique within a document, so it the same column appears in multiple reports/forms, ensure each column alias is unique.)

ApEx 4: after upgrade, "when no data found" message on report not shown

I have a page that displays a tabular form. Initially, the table is empty, and so I have text in the "when no data found" block of the report attributes.
After upgrading to ApEx 4, this text is no longer shown when no results are returned. It displays the table header, but no rows. So for some reason, it thinks data is being returned -- even though the table is completely empty. I've tried several permutations, but have not been able to find a workaround.
I'll try to set up a standalone page, but I can provide a pointer to the existing page on apex.oraclecorp.com on request.
UPDATE: I think this may be related to the bug I reported on tabular forms.
Is it possible that the empty, hidden row we are adding now counts as a returned row, even though the SELECT statement returned nothing? And thus the report never thinks that there is no data found? This would also explain why it's displaying the table headers, even though no rows are visible.
Edited by: kswartz on Jul 8, 2010 12:18 AM

Interesting. I didn't see anything about this change in behavior in the Release Notes. Did I miss something? It definitely didn't do this in 3.2.
Overall, I think that's actually a very non-obvious change. Seeing a set of table headers with nothing below it looks to me like a mistake. Why would you ever show headers for something when you have no rows? In fact, I thought that was a bug the minute I saw it. With due respect, I don't think the new design is less desirable from a usability perspective than the old one.
It also doesn't work as you described regarding the proportions: in my case, the columns in the header row did not match the sizes of the columns as I defined them. Although I didn't place anything beside the tabular form, if I had, it would still alter the layout when "Add Rows" is clicked. If you know what the size of those columns is supposed to be (because they are text fields of size xyz, for instance), why wouldn't you define the header cells to use that information? You won't get it exact most of the time, but you can get close, if they're all text fields of specific width.
Plus, there's nothing on the Report Attributes tab that indicates the "When No Data Found" option won't apply if you are using a tabular form. The textareas should be disabled -- and at the very least, the on-line help should be mentioning this. It doesn't mention anything about this only applying to standard reports.
Finally, I think you should also put this in the Release Notes, because this requires changes to any application where someone with a tabular form required this. In one case, that was where I provided instructions to users entering data for the first time. Now I have to move it. (Not a big deal, but it would have been nice to know that in advance.) On another page, I put a JavaScript block in there to submit and automatically add a row, because I wanted there to always be a blank row if nothing had been entered -- and that was the easiest way. Okay, granted, that's probably not something you intended to support, but there was nothing wrong with it, technically. And, again, it's fixed by moving that block to the header instead and testing for the number of rows in the table -- easy, now that you provide JQuery for us -- but still manual migration work.
Thanks for the explanation.

Suppress the enter-query mode when no-data-found after execute a query.

HI,
Greetings of the day, Can any one suggest me that how to Suppress the enter-query mode when no-data-found after execute a query on the form by a button.
whenever i execute query on form and result is no data found then form :system.mode is still in enter-query mode.
i want that if result is no data found then form comes back it initial state.
i will thank full of him who will help me..
Thanks in Advance..

Put this in your Key-ExeQry trigger:Execute_Query;
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MSG      Varchar2(150) := SUBSTR('   '||MESSAGE_TYPE||'-'
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Orchestration exception:Exception occurred when persisting state to the database because of special character ' ' in HL7 message.

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public void ProcessRequest(XLANGMessage reqMessage)
XmlDocument xmlDocument = (XmlDocument)reqMessage[0].RetrieveAs(typeof(XmlDocument)); It is failing here with the error
“ ', hexadecimal value 0x10, is an invalid character. Line 1, position 1865. “
Note : Please find the special character in the attachment circled in red color.

Hi ,
Please find the xml and the screenshot.
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<OBX_1_SetIdObx>3</OBX_1_SetIdObx>
<OBX_2_ValueType>TX</OBX_2_ValueType>
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<CE_1_Text>Where pt. will be transported to \T\ where famly can wait:</CE_1_Text>
</OBX_3_ObservationIdentifier>
<OBX_4_ObservationSubId />
<OBX_5_ObservationValue>Y</OBX_5_ObservationValue>
<OBX_6_Units>
<CE_0_Identifier />
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<OBX_7_ReferencesRange />
<OBX_8_AbnormalFlags />
<OBX_9_Probability />
<OBX_10_NatureOfAbnormalTest />
<OBX_11_ObservationResultStatus>N</OBX_11_ObservationResultStatus>
</OBX_ObservationResult>

Utl_file - exception handling when inserted in bulk.

Hi,
I am using Oracle 10gR2. I wanted to write data to a file. Due to huge number of records, I am collecting them into a collection, traversing e collection, appending the values in collection to a varchar variable with new line in a loop.If the array size is say 50, I will have 50 values in the Vatchar variable separated by CHR(10). and I will insert the variable using UTL_FILE.PUT so that 50 lines will be inserted with values into the file.
Now my query is if any one among those 50 values gives an exception, I feel all the 50 values can't be loaded. Please suggest exception handling in this case.
Regards,
Naveen Kumar.C.
Edited by: Naveen Kumar C on Sep 17, 2009 5:23 PM

You could use a CLOB in conjunction with UTL_FILE to write it out 32K at a time...
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2    l_file    UTL_FILE.FILE_TYPE;
3    l_clob    CLOB;
4    l_buffer VARCHAR2(32767);
5    l_amount BINARY_INTEGER := 32767;
6    l_pos     INTEGER := 1;
7 BEGIN
8    BEGIN
9      SELECT dbms_xmlgen.getxmltype('select * from emp natural join dept').getclobval()
10      INTO   l_clob
11      FROM   dual;
12    EXCEPTION
13      WHEN NO_DATA_FOUND THEN
14        RETURN;
15    END;
16    l_file := UTL_FILE.fopen('TEST_DIR', 'Sample2.txt', 'w', 32767);
17    LOOP
18      DBMS_LOB.read (l_clob, l_amount, l_pos, l_buffer);
19      UTL_FILE.put(l_file, l_buffer);
20      l_pos := l_pos + l_amount;
21    END LOOP;
22 EXCEPTION
23    WHEN NO_DATA_FOUND THEN -- occurs when end of CLOB reached
24      UTL_FILE.fclose(l_file);
25    WHEN OTHERS THEN
26      DBMS_OUTPUT.put_line(SQLERRM);
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EDN Mediator exception handling

Hi All,
I am subscrbing to business events through mediator.and then i am using the database adaptor to insert the data into a table.
I want to implement exception handling for the events.The delivery policies for event in mediator is guaranteed.Howver i still see the oracle text as The event is guaranteed to be handed to the subscriber, but because there is no global transaction, there is a possibility that a system failure can cause an event to be delivered more than once. If the subscriber throws an exception (or fails in any way), the exception is logged, but the event is not resent.
Does the above statement menas that i will lose my business event data.I cannot afford to miss any business events in any case.So i would like to know if in guaranteed delivery of events if the subscriber gives an error , i want my events to be still stored in database and not give excpetion to the publisher.
Pls help its urgent
Regards.....

I think it is clearly defined here -
http://docs.oracle.com/cd/E28280_01/dev.1111/e10224/obe_intro.htm#CHDIBHBE
guaranteed
Events are delivered to the subscriber asynchronously without a global transaction. The subscriber can choose to create its own local transaction for processing, but it is committed independently of the rest of event processing. This option incurs a lower cost than the one and only one option because there is only the trip to one queue (the main event queue). In addition, EDN does not attempt to resend an event (regardless of the backing store being AQ or JMS). If one or more subscribers fail to consume the event (while others succeed), those subscribers lose the message. In this respect, guaranteed delivery actually means best effort delivery; that is, it is not guaranteed that each subscriber definitely consumes the message.
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Regards,
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Can not view/export a report which has 2 group by field when no data found

Recently I developed a report, which contains 2 group by fields. it runs successfully when the report displays some data.
but when there is no data, i cann't view/export this report.
It shows nothing by html format and shows "this file cannot be opened because it has no pages" message by pdf format.
even there is no records for this report, i still want to see the template file and show some basic information.
please help me.
Daniel

I've found that, just like I used to do in Oracle Reports, if you put in a COUNT column to count your returning rows, you can put 'No Data Found' when there's no data. That way, your report will return and not error out.
For .pdfs, this is the code I use; COUNT with code of <?if:count(field_name)=0?>.
In the .rtf..
COUNT
No Data Found
END COUNT
Put this in the .rtf before your data should appear or else it won't work.
Hope this helps!
Kris

Cancelling a report when no data found

Hi All!
I have a report that prints directly to the printer. But if the report query fetches no data then a blank page is printed.
How should I raise a customized message and stop the report execution if there is no data found?
Thanks in advance

Hello,
Another way is this: Put a report level summary in the data model that counts the rows in the query (use as the summary count source one of the columns of the main query).
Then create an after report trigger that looks something like this:
function AfterReport return boolean is
begin
if (:cs_count = 0) then
raise srw.program_abort;
end if;
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You'll have to warn people about this particular error log entry as this may look like abnormal termination, when in fact it is a deliberate termination of the report. But at least you won't get a blank page.
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Oracle report , when no data found in query then ptint zero in text how

hi ,
i have use oracle report in one query if no data found then i have return O but no row select is there
query is
select sum(nvl(a.pitm_matl_cost,0)),
decode(b.pm_assy_type,'B','B','Z')
from pumpitems a, pumpmast b
where a.pitm_proj_code like 'KAWASII' and
a.pitm_pump_type = b.pm_pump_type and
a.pitm_comp_type = b.pm_comp_type and
a.pitm_sr_no = b.pm_sr_no and
substr(a.pitm_matl_code,1,1) = 'X' and
pitm_itm_cal = 'N'
group by decode(b.pm_assy_type,'B','B','Z')
order by decode(b.pm_assy_type,'B','B','Z')
no data then it return no row select but
i have return 0 how is possible , in report i have check cf, and cs to total , and no data then print 0 in text box so.
sol1:
select count(*), sum(nvl(a.pitm_matl_cost,0)),
decode(b.pm_assy_type,'B','B','Z')
from pumpitems a, pumpmast b
where a.pitm_proj_code like 'KAWASII' and
a.pitm_pump_type = b.pm_pump_type and
a.pitm_comp_type = b.pm_comp_type and
a.pitm_sr_no = b.pm_sr_no and
substr(a.pitm_matl_code,1,1) = 'X' and
pitm_itm_cal = 'N'
/*and
substr(a.pitm_matl_code,1,1) != 'C' and
substr(a.pitm_matl_code,1,1) != 'F' and
substr(a.pitm_matl_code,1,1) != 'S'*/
group by decode(b.pm_assy_type,'B','B','Z')
order by decode(b.pm_assy_type,'B','B','Z')
count(*) is return 0 but it's notworking in this query why i dont no
another soluction than help

This sounds like it's similar to another recent post
Re: How do I print some value when there is no record against field

IR Search bar display on the right when no data found

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Edited by: deandyno on Aug 22, 2011 12:31 PM

deandyno wrote:
How do I get the Interactive Search bar to be left justified when no data is found. I'm using Sand 10 Theme, and the region my interactive report is in is Page Template Region Position 3
Does anyone have a suggestion on this?Have you actually considered where Region Position 3 is located on the page? Content in regions that are located on the right tends to be displayed on the right.
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Hi all
i have report with few user parameters
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Please Guide
thanks And Reagds
Vikas Singhal

Hi,
one solution is to
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2) create a text area where you say for example "No records found...", and enclosing it in a frame.
3) Create format trigger for the frame like
IF :CS_COUNT = 0 THEN
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ı use oracle forms 10.1. when ı use the code below
SET_BLOCK_PROPERTY('MY_BLOCK', DEFAULT_WHERE,     'YEAR=2012') ;
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ALERT_BUTTON Number;
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Mediator Exception Handling without fault policies

Hi,
Could somebody help me on defining exception handling to MEDIATOR component?
Is there is a way where we can do this without using the fault policies?
Thanks,
SV.

Business faults are application-specific and are explicitly defined in the service WSDL file. You can handle business faults by defining the fault handlers in Oracle JDeveloper at design time. System faults occur because of some problem in the underlying system such as a network not being available. Oracle Mediator provides fault policy-based error handling for system faults.http://docs.oracle.com/cd/E21764_01/integration.1111/e10224/med_faulthandling.htm
Regards,
Anuj

Exception Handling - WHEN OTHERS

Good Day to All,
When i am running a procedure in TOAD-Expert... it says below message.
*'Avoid using a WHEN OTHERS clause in an exception section without any other specific handlers.'*
PROCEDURE...
IS
BEGIN
EXCEPTION
WHEN OTHERS THEN
ROLLBACK;
-- Checking whether cursor is open
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UPDATE TABLE
SET COL..
WHERE ...
   COMMIT;
   RAISE;
END procedure;

The manner in which you are dealing with the exception is not wrong. Your handler does a couple of things:
- rollbacks the existing transaction as failed
- attempts resource protection (guard against resource leakage)
- logs the error
- re-raises the exception
None of these are invalid actions when dealing with an exception.
A suggestion though - move the UPDATE out of the exception and create a procedure that performs the logging for you (as an autonomous transaction). This way you have a reusable logging code unit that can be called from anywhere in your code.
Resource protection for explicit cursors are also not that critical in PL/SQL - as cursor handles that go out of scope are automatically released. The exception being a ref cursor handle. Of course, you need to resource protect other handles (like socket and file handles). And seeing that PL/SQL does not offer resource protection blocks, the only alternative is to use the "+when OTHERS+" exception handler for that.

Mediator exception handling when no data found in database

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