Session state in websheets?

Hi guys,
I fear that it is not possible, just wanted to make sure.
I haven't found a way to maintain session state. For example to include a combo box to store a selection in it (e.g. a Project identifier).
Also, it looks like we cannot reference any internal variables like &APP_USER., &APP_ID., &APP_SESSION., etc. either. Am I wrong or is this a true limitation?
Thanks,
Dietmar.

You are on the right track to use caching for shared state. Where caching gets confusing and temporal (as you have seen by different
articles on different dates) is that what used to be called Azure caching is now called Windows
Azure Shared Caching. In October 2012, Windows
Azure Caching was released (as per the article you found) and is role (instance-based as opposed to shared) caching. Use the
'Caching' and not 'Shared Caching' as shared caching does not perform that well, is expensive, and generally replaced by (non-shared) caching. If you need it, shared caching is still available in the old Silverlight portal, which you get to by selecting 'Previous
portal' on the drop-down menu on your name. Other features, such as reporting services, are currently only available in the 'previous portal'.

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How to tell if a user is issuing 'alter session statements'

When I run 'alter session' from sqlplus in my schema, this does not get parsed and go to v$sql or show up in v$open_cursor. I have a user that is running queries from informatica. He says he is passing alter session statements through informatica, I want to see if they actually get there. The person is not real versed in oracle and I don't know informatica.
i cant turn on trace cause he connects and disconnects and this would run immediately, I am not in a position to turn on system level tracing, add a trigger, or turn on auditing (not allowed).
anyway to tell from a data dictionary view or something like that if these were issued by a given session? The queries run for a few minutes, so I have a bit before his session disconnects to query the data. I can't get him to change his code to stay connected. Is there a view that shows parameter changes for a given session?
oracle: 10.2.0.5
4 alter session commands are:
Alter session set sort_area_size=999999999;
Alter session set hash_area_size=999999999;
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alter session enable parallel dml;
Edited by: Guess2 on Jul 17, 2012 12:49 PM

i cant turn on trace cause he connects and disconnects and this would run immediately, I am not in a position to turn on system level tracing, add a trigger, or turn on auditing (not allowed). If Informatica connects to Oracle via network, capturing TCP/IP traffic and mining in it may be your last resort.
you can get session's PDML status from
select pdml_status from v$session;
i cant turn on trace cause he connects and disconnects and this would run immediatelythis contradicts to your following statement
The queries run for a few minutes, so I have a bit before his session disconnects to query the data.
I can't get him to change his code to stay connected. Informatica should have debug. Ask him if he can go step by step.
Edited by: user11181920 on Jul 17, 2012 5:53 PM

Session state is not being passed properly to another page

Hello Gurus,
I have a multi-page application which authenticates using a simple authentication page 101. Right now I have a generic authentication scheme which always returns true (Session Verify Function= return true; I will integrate LDAP later.) It works fine. The app remembers the username from one page to the next (popup pages mainly).
My issue is that, after exporting the application and re-importing into a new workspace, the user/session state is no longer being preserved from page to page. It prompts for a login every new page that is opened (the popups). This ruins the flow and functionality of the app.
I've checked every setting (I think) and cannot find any differences between the two workspaces or apps. Any ideas why this would work in one workspace and not the other?
TIA!
Jonathan
I should also indicate that the issue seems to be specifically in calling "callmypopup" function. For some reason it isn't passing the session id properly to the popup page, where it did fine in the other workspace. function text:
function callMyPopup (sourceItem, popuppagenum, targetItem, appid, appsession) {
//opens popup pg and passes value in sourceItem to targetItem
//sourceitem=calling text box, targetItem=text box in popup page
var minlength = 3;
if (CheckLength(sourceItem, minlength))
var formVal1 = document.getElementById(sourceItem).value.toUpperCase();
var url;
url = 'f?p=' + appid + ':' + popuppagenum + ':' + appsession + '::::' + targetItem + ':' + formVal1;
w = open(url,"winLov","Scrollbars=1,resizable=1,width=800,height=600");
if (w.opener == null)
w.opener = self;
w.focus();
else {alert('Please enter at least ' + minlength + ' characters in your search.');}
Edited by: austindurant on Sep 5, 2008 7:02 AM
Edited by: austindurant on Sep 5, 2008 7:46 AM

It looks like your session id is not correctly passed to your popup page. Try using:
javascript:popUp2('f?p=&APP_ID.:1:&SESSION.:::::', 600, 700);
instead, which does the same thing. Put your parameters for the page items there if required.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Problem with application item and session state

Okay, let's see if I can explain this problem coherently.
I have a small app (one page), with an application item, F_WHERE_CLAUSE.
This page has three regions in which there are items that the users can populate for search conditions. A couple of these items are "select list with submit" (I still need to upgrade to the AJAX method, I know). There is another region which has one hidden field, called P1_WHERE_CLAUSE. This field is defined to "Always, replacing any value in session state..." with source type of "Item (application or page.....", and a source value of F_WHERE_CLAUSE with no default value.
I have a button called "Search" which submits the page and fires a PL/SQL process which builds a where condition based upon the other page items and stores the value to the application item F_WHERE_CLAUSE (correctly).
For testing, I've made the P1_WHERE_CLAUSE field visible so that I can see what's going on. I've also clicked the debug and session buttons to help trace this. After I click the "Search" button and the page submits, debug shows:
0.02: ...Session State: Save "P1_WHERE_CLAUSE" - saving same value: "1=1"
followed later by:
0.05: ...Session State: Saved Item "F_WHERE_CLAUSE" New Value="lower(primary_class) = 'rock' and country = 'Spain'"
The field P1_WHERE_CLAUSE displays with the correct search criteria as signified by F_WHERE_CLAUSE above. However, If I click the "session" button to view the session state values, P1_WHERE_CLAUSE shows up as:
P1_WHERE_CLAUSE Textarea 1=1 U while F_WHERE_CLAUSE displays the correct value still.
The reason this "problem" came up, is that this page also has three SQL report regions which use &P1_WHERE_CLAUSE. for the where condition. While they display the correct results on-screen, each report region also has the "Export to csv" enabled, and the export seems to be using the "1=1" condition (from the "session" window) instead of the search criteria that the on-screen region is using (F_WHERE_CLAUSE and the displayed P1_WHERE_CLAUSE), resulting in a retreival of all records.
Anybody have any idea what's going on and why, and how to get the csv export to use the correct value for the where condition?
Thanks,
Bill Ferguson

It appears the "Export to CSV" functionality requires the item value to be set in session state. The P1_WHERE_CLAUSE item value never gets saved to session state. The page is rendered and the value is put in the item on the page but until you submit the page session state doesn't know what P1_WHERE_CLAUSE is.
Create a before header computation or process to set the value of P1_WHERE_CLAUSE (which will save it to session state). It is interesting that the report regions didn't need to look at the value in session state but the "export to csv" does.
--Jeff

Interactive Report Download and Session State Protection

I have created an Interactive Report in an APEX application that I have enabled
session state protection for. The issue I am having is with the "Download"
functionality of the interactive report to a .csv file.
The URL created by selecting Download from the drop down (javascript:gReport.controls.download();)
is built or constructed without a checksum thus causing the error below.
Error
No checksum was provided to show processing for a page that
requires a checksum when one or more request, clear cache, or argument
values are passed as parameters.
The anchor tag containing the URL (/f?p=app_id:page:session_id:CSV:) is contained within
<div id="apexir_CONTROL_PANEL_DROP" class="drop_panel
clearfix" style="">
Running the following: Application Express 3.1.0.00.32 on Oracle Database 10g Enterprise Edition Release 10.2.0.3.0
Is there a way to add a checksum to this? OR does anyone have any ideas on how to work around this?
Edited by: Bryce Tuohy on Feb 26, 2009 10:08 AM

WORKAROUND:
1.) Create hidden ITEM on page (I named it P23_PREPARED_CSV_DOWNLOAD_URL).
Enter the following for the ITEM
as the SOURCE_TYPE : PL/SQL Function Body
as the SOURCE: return apex_util.prepare_url('f?p=&APP_ID.:&APP_PAGE_ID.:&APP_SESSION.:CSV:')
2.) Create BUTTON that executes javascript to open POPUP window with this url.
a.) Create Button and enter
<a href="javascript:popupURL('&P23_PREPARED_CSV_DOWNLOAD_URL.')">Download and Save to CSV file</a>as the "Text Label/Alt"
Originally had custom code for javascript POPUP and this is not needed .... just use the APEX javascript function.
Edited by: Bryce Tuohy on Mar 5, 2009 10:47 AM

How to update session state from form field values without submitting page?

Hi,
I am new to Oracle APEX. I am using Oracle Apex 4.2 on Oracle 11g release 2. The problem is that when I am entering data on a form, when I enter a value in one field and move to the next field, how can I use the value of first field in the validation procedure of next field? I know that when we enter data in fields, the session state is not updated with these values until we submit the page... right... but I have seen that if there is a control of List box type, then Apex gives an option "Action When List changes" where we can choose option to update corresponding session state field with the value of list box item, without submitting the page.
Now my questions is why this option is only available for List box items? why not for other item types like Text box, Check box,... ? can someone please help me with this?
(the issue with update of session state depending on page submitting, is that we need a complete network round trip from client to server in order for it. However if we can update session state variables without submitting page, then we can avoid this network traffic).
Any help will be greatly appreciated. Thanks in advance.

Create a dynamic action on change and run a PL/SQL process there with the following code:
BEGIN
NULL;
END;Page items to submit > your item.
This will set the session state without submitting the form.
Further examples here:
http://apex.oracle.com/pls/apex/f?p=31517:229
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.apress.com/9781430235125
http://apex.oracle.com/pls/apex/f?p=31517:1
http://www.amazon.de/Oracle-APEX-XE-Praxis/dp/3826655494
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Session State in Report Queries

Hi all,
I've got a report query with XML Structure set to advanced. I added two items to session state - a "department name", and a "current date" - these are application items that I want to put in the page header of my report template.
After I load the XML data and go to insert a field, I see some session info available for inserting (appl id, user, report title, etc.) along with my report fields, but I don't see the two session items I added. I took a look at the XML data and they're not there.
How do I get the session items to be included with the XML?
Thanks!!!

Sorry, I should have mentioned I am using a BI Publisher RTF Layout for my report layout, therefore I don't believe I can use it on apex.oracle.com. If BI Publisher is in fact installed there, then please correct me.
I am including session variables with the report, but the session variables between all of the report queries in my application are common between report queries. (Even though I really only want variables specific to each report to be included) When I add or delete a session variable from one report query, it affects all report queries in my application. This could be a feature, but I doubt it since it does not seem intuitive.
In addition, sometimes a random session variable or set of session variables will disappear from the list. (this is what I meant by drop) I cannot seem to determine when/what triggers this action, but it seems like this may occur when I delete a particular report query.
I can try to put up an example on apex.oracle.com, but I'm not sure if this is dependent on the presence of BI Publisher.
Thanks in advance for any help!
-David

Session state and browser cache - Back button problem

Hi all,
I have a problem (and unless I'm missing something I think we all do) with session state and use of the browser's Back button. I really hope I'm just being dumb...
Background scenario:
Page P has a sidebar list allowing the user to select what content is displayed (e.g. 'stuff relating to X, Y or Z' where X, Y and Z are rows in, say, a table of projects). When a list entry is clicked, we branch to page P with the value of the list item placed in an application-level item (call it G_PROJECT). Reports on page P use G_PROJECT in their WHERE clauses.
So, click list entry X and G_PROJECT is set to X and page P shows reports for project X.
Page P also has a set of buttons which branch to various edit pages which allow attributes of page P's current project to be updated. These pages similarly use G_PROJECT in their WHERE clauses.
Problem scenario:
1. The user goes to page P and picks project X off the list. Project X's stuff is displayed (G_PROJECT = X).
2. The user then picks project Y off the list. Project Y's stuff is displayed (G_PROJECT = Y).
3. The user then clicks the browser's Back button. The page is served from browser cache, so project X's stuff is displayed, but G_PROJECT still = Y.
4. The user clicks an 'Edit' button; we submit, and branch to an edit page which displays (and will edit) data for project Y because G_PROJECT still = Y.
This is SERIOUSLY BAD NEWS - apart from being confusing, the user's edit permissions on projects X and Y may differ, and so the user may be able to perform 'illegal' updates.
I've read what I can on this forum and the rest of the web looking for ways to a) inhibit browsers' 'Back' functions and/or b) prevent pages being cached by the browser, but none of them have worked for me.
Short of waiting for browser manufacturers to recognise that the web is now full of applications as well as static pages, and enable robust programmatic control of cache behaviour, does anybody know how the problem can be avoided - or at least detected?
Thanks,
jd
Failed attempts to date:
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="cache-control" content="no-store">
<meta http-equiv="cache-control" content="private">
<meta http-equiv="cache-control" content="max-age=0, must-revalidate">
<meta http-equiv="expires" content="Wed, 09 Aug 2000 01:01:01 GMT">
<meta http-equiv="pragma" content="no-cache">
Disallowing duplicate submission (page attribute).
window.history.go(1);

Thanks Scott,
I may be being dumb here but I don't see how that would help...
P250_PROJECT and G_PROJECT are currently kept in sync by app logic. Whichever is used to drive, if the page is rendered from cache then the app logic is not executed, so the rendered page contents are not those keyed by P250_PROJECT, as illustrated in steps 1-4 of the problem above.
The user sees X, the session items say Y. The engine doesn't know what the user is seeing.
when page P is POSTed, its hidden item P250_PROJECT should always be used to derive the application item G_PROJECT. Then whether the page was pulled from cache or rendered anew via a click from the sidebar link, the project ID is determined by the contents of that page.
As I said above I tried this, with the 'Edit' branch set to:
Set these items: G_PROJECT
With these values: &P250_PROJECT.
but it makes no difference. The project ID is not determined by the rendered page contents - the engine gets the value of P250_PROJECT from session state.
I can code the 'Edit' pages such that they check permissions and if necessary redirect back to p250 (conditional before-header branch), but that's a clunky cure rather than the prevention I was hoping for.
Please tell me if my understanding is incorrect.
jd

Session state and item values

Hi,
Is it any possibility to bring the session state and an item value to a table?
Thank you

Hi,
For session id use APP_SESSION substitution string
http://download.oracle.com/docs/cd/E23903_01/doc/doc.41/e21674/concept_sub.htm#sthref160
Regards,
Jari
http://dbswh.webhop.net/dbswh/f?p=BLOG:HOME:0

Row fetching, session state, multi-page processing of 1 row - problems

I'm building an application that's updating a couple of tables via an updateable view and an instead-of trigger. That portion of it works OK, EXCEPT for the problems that I'm having with the APEX end.
I've got 3 pages; the first page reads the row in via the automated row fetch and has, say columns 1-20.
Page 2 has, say, columns 20-40 and page 3 has the remainder.
I have the row fetch set up conditionally so that it only executes the first time that page 1 is displayed. All the columns are set as Database Columns.
It seems that if I fill in fields on page 1, move to page 2, and back to page 1, the contents of the fields on page 1 are destroyed unless I set their 'Source used' to 'Only when the current value in session state is null'.
Furthermore, upon update (which is on page 3, via an automated row update), the only columns that get updated are those that exist on page 3. The column values from the other pages no longer exist.
Does navigation to another page not retain the session-state of database-column items?
Am I better off just writing my own processes to perform the updates?
Any other suggestions?
Frank

Hello Frank,
>>I have the row fetch set up conditionally so
that it only executes the first time that page 1 is
displayed …
It seems that if I fill in fields on page 1, moveto page 2, and back to page 1, the contents of the
fields on page 1 are destroyed unless I set their
'Source used' to 'Only when the current value in
session state is null'.
It seems that the first sentence is not consistent
with the second one. The only reason the values are
destroyed, as you call it, is that the ARF is running
again. What condition are you using on your ARF?
In any case, the right way to deal with it is to
change the source used to "Only …", as I understand
you already did.
Hi Arie,
I set an item after the first ARF. I then have the ARF set to execute conditionally based on the presence of that item. (I also display a success message on the ARF, so I know that the ARF is only occurring once). I move to subsequent pages by submitting the current pages.
>>Does navigation to another page not retain the
session-state of database-column items?
Navigating to another page does retain the session state values.
It's depends on what you mean by navigating.
Submitting the page set/update session state.
Redirect without submitting the page will not
set/update the session state.
>>Furthermore, upon update (which is on page 3,
via an automated row update), the only columns that
get updated are those that exist on page 3. The
column values from the other pages no longer
exist.
Automatic DML is working only with the current page
items. You can't use it to insert/update other page
items, even if they are in session state. However, in
your case, it's not the Automatic DML performing the
actual updates, but your triggers. Are your triggers
relying on session state values?
I think this statement 'Automatic DML is working only with the current page
items.' answers my question. My trigger is working on session state values. It's an 'instead-of' trigger, so I was letting the automatic DML perform the 'update' on the view, while allowing the trigger to do the actual update of several tables that the view joins by referring to their :NEW. values in the trigger. Since the DML occurs on my last page, those were the only session state values that my trigger ultimately saw.
>>Am I better off just writing my own processes to
perform the updates?
I believe the correct way is to submit the page and
then branch to the next one. Submitting the page will
save all your items in session state, and allow these
items to be available for page 3 DML.
Regards,
Arie.I'm doing that already - all the values do appear to be in session sate, except only the items that are on the last page actually make it to the automatic DML update, which seems to agree with your previous statement.
I suppose I could write my own process to perform the update, as the values are available in session state.
Thanks,
Frank

Saving session state in database table rather in websever for Ordering App

Hi all,
Ours is a ordering application (telecomm) domain.
Currently, we are storing user sessions data (Order shopping cart session data) in middle tier (iPlanet web server) which inturn consumes lot of memory resources.
Shopping cart could be in MBs if order is a huge business order.
So in order to not to overtax web server (middle tier), we are thinking of storing session data directly in a database table to relieve the overhead on web server and make use of database for storage.
I read that APEX (html db) is already using this "single metadata table" approach for session data management. But we are not using HTML DB to really look into.
Can some one advise how to go about storing "user session data" directly in a "database table" for both storage and retrieval purposes instead of storing it in "webserver".
How does this "metadata table" structure looks like. Is it more generic ?
Really appreciate your time and help/suggestions.

Joel,
Thanks for your response. sorry, i meant to say that "the current application does not use APEX but will look into it".
To build this is an utterly non-trivial exercise. Oh - it may not be so hard to save session state to a table when you POST a page. But you may want to reference this in many places, and it's a question of can you change all of these references to indirect references from session state in your application.In order to free up the load on webserver, we want to maintain session management in database. Could you please explain the above little more :
How do we maintain the "user session" with "database table" ?
Do we need to store "session data" at java object level or by page in database table ? How does the structure of this "metadata table" looks like.
Thanks for your time.

Use session state values to set column value during insert/update

I am building an APEX 4.2 application that uses the canned Data Loading control to upload csv data to a table. I have modified the 'Select Data Source' page of the workflow and it now contains three LOV's that the user selects values from. The selected values are stored in Session State. As I'm new to APEX, I do not know how to reference Session State objects in the context of the Data Loading workflow so that the appropriate columns are set with the correct values. My assumption is that the columns that are apart of the insert statement reside in a collection somewhere. I just don't know how to loop through the collection, determine the correct column, and then set that column's value equal to the corresponding LOV value in Session State.

Scott,
This is in version 2.2.1 and there are no caching features available.
The application does require login.
I'm playing around with the APP_UNIQUE_PAGE_ID right now but I am finding that even in the builder if I edit the attributes of a report column and then try to edit another column it will bring up the last column I edited. Even if I use the record navigation buttons next to the Apply Changes button it will keep bringing me the same page over and over unless I constantly refresh the pages.
Greg

Different ways to referencing Session State variables

Hi,
According to APEX documentation there's 4 different ways to reference session state variables: http://download-west.oracle.com/docs/cd/B32472_01/doc/appdev.300/b32471/concept.htm#BEICHBBG
In an inline PL/SQL statement, what's the difference when using the different methods? I remember reading something that the bind and static text have a size restrictions. What's the difference between the V() and NV() functions?
Thank you.
Martin

Martin,
In PL/SQL, the preferable method is to use bind variable notation, e.g., :P1_ITEM. In HTML contexts, you must use &ITEM. notation. In stored procedures, you can use v or nv, the latter function being identical to the former with the additional characteristic that it raises an exception if the retrieved value is non-numeric.
Scott

URGENT PLEASE HELP-Session State Provider for 8i.

We are looking for a SESSION STATE PROVIDER for .NET 2.0 for Oracle 8i. Please help to find a solution. The current installation on the Oracle website does not work for 8i.
Thanks a BILLION in advance.

You'll need to install the ODP 11 beta...

Feature Request - show substitution string values in session state display

Hi!
I would like to request that in addition to page and application items and session state values that the value of substitution string values be shown. Another option would be to have a separate link (like session) to display them. This would allow developers to see all of the available substitution values and how they change across pages, etc.
Thanks!
Dave Venus

Dave - What are some examples of values that you are not seeing in the session state report that would be useful?
Scott

Session state in websheets?

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