APEX 402 and AnyChart graphing

hi,
I am new to APEX 402, about 3 days, and have been playing around a bit and need some help.
I have a screen with 3 lists, e.g L1, L2 and L3.
I want to design a screen that when the user selects an entry from each list it then creates a graph. The graph is no major problem.
My problem is that if the user selects a differnt value from the lists I need to redraw the graph.
I have played about with hide/show functionality but that is not redrawing graph and also a button to display the graph but that didnt work out.
Anybody help with this issue
Thx,
Michael.

Got this sorted.

Similar Messages

APEX Listener and EPG - strange behaviour

Hi
For some years, I've used EPG for APEX but have struggled with performance particularly as I can have up to 150 student developers using at any one time.
I do a fair amount of work using ORDImage and have successfully developed APEX applications to upload image files and display full-size and thumbnail images.
After upgrading to APEX 4.1 (from 4.0), I decided to install APEX Listener standalone.
Before I did so I checked that my applications still worked in 4.1 and they did.
However, just installing APEX Listener but not configuring it (yet) has meant that my image display in a report using a procedure based on wpg_docload.download_file( l_ordimage_image.source.localData ) no longer works in EPG - the images are not displayed.
Configuring APEX Listener and running the same application through that DOES display the images.
So this part of the application works under APEX Listener but not under EPG.
My application also allows users to upload images from APEX_APPLICATION_FILES using standard code. Under APEX Listener after uploading, I'm left with a blank page with a wwv_flow.accept URL although the image does indeed upload. Under EPG it works as expected and I get a success confirmation.
So this part of the application works under EPG but not under APEX Listener.
Has anyone else come across different behaviour depending on the mode of connection?
Thanks
Brian
[Oracle EE 11gR2, Windows Server 2008R2, APEX 4.1, APEX Listener 1.1.3]

Hi Brian,
it sounds like you have both EPG and APEX Listener running on the same machine, so your problem might result from a port conflict. Note that both services use TCP port 8080 as default.
At least a port conflict would explain the strange behaviour in your case, some things working on one web server and some on the other.
Some parts of your initial post hint to that direction, e.g.
However, just installing APEX Listener but not configuring it (yet) has meant that my image display in a report using a procedure based on >wpg_docload.download_file( l_ordimage_image.source.localData ) no longer works in EPG - the images are not displayed.... because the APEX Listener only interfere with the EPG if it is at least running on the same machine as your database and furthermore, if it is unconfigured in terms of ist database connection, a port conflict might be the only way it could cause anything like that.
However, if you are sure that's not the issue, please check if you see any error in the APEX Listener's log for the following action you performed:
My application also allows users to upload images from APEX_APPLICATION_FILES using standard code. Under APEX Listener after uploading, I'm left with a blank >page with a wwv_flow.accept URL although the image does indeed uploadIf you actually see just a blank screen, something very bad must have happened and you should see some kind of stack trace there.
For further investigations, if necessary, it would be helpful to know how you deployed or started your APEX Listener and which JDK version you use.
For the moment, I still think the port conflict is my best guess.
You could avoid it by either changing the port for EPG (I'd not recommend that if you have other users still using it) or by changing the port for your APEX Listener.
-Udo

Apex RBAC and Seamless Single Sign ON

Hi ,
We are building a GBAC (Group Based Acces Control) and SSO Module in Apex (I know .. Reiventing the wheel) as we have budget constraints and there are some limitiations in standard Apex implementation.
Problem Space:
Apex Version: 4.1.1.00.23
We have Multiple Workspaces and Multiple Applications within those Workspaces.
Our Users currently have a separate link for each App - Very Cumbersome.
The Current Authentication Mechanism is LDAP authentication. We have no Authorisation module in place.
This is a security Nightmare as any user with a valid LDAP account can access the Apex Reports/Forms if they get their hands on the Link.
Solution
We have built an Admin Module where we create Groups (Not Apex Groups) and then assign applications to those Groups. Apex Groups have a limited Scope (Workspace only).
Our Groups are Cross Workspace and can contain applications from Multiple Workspaces.
We finally assign LDAP users to those Groups.
All the Meta Information is stored in DB tables
We also use a lot of the Apex Dictionary tables to Get Application info
Where i am now Stuck
We now have created a Single Lauch Point (New App) to simulate a SSO Portal
Users will log into this Apex App using their LDAP Credentials.
Once the user is successfully Authenticated by LDAP, we check all the Groups the User Belongs to and Populate the Launch Page with Links for the Apps the user has access.
Now rather than Point the Link to Page 101 which is the login page we point the same to the Main Page (Page 1).
When the user Clicks on the Link, he gets shown the Login Page Again.
We do not want the user to Authenticate again as this defeats the Purpose.
Any sort of Pointers most appreciated.

Hi,
79b59e85-1c75-40f2-8ca8-5688ec13cff0 wrote:
Hi ,
We are building a GBAC (Group Based Acces Control) and SSO Module in Apex (I know .. Reiventing the wheel) as we have budget constraints and there are some limitiations in standard Apex implementation.
Problem Space:
Apex Version: 4.1.1.00.23
We have Multiple Workspaces and Multiple Applications within those Workspaces.
Our Users currently have a separate link for each App - Very Cumbersome.
The Current Authentication Mechanism is LDAP authentication. We have no Authorisation module in place.
This is a security Nightmare as any user with a valid LDAP account can access the Apex Reports/Forms if they get their hands on the Link.
Solution
We have built an Admin Module where we create Groups (Not Apex Groups) and then assign applications to those Groups. Apex Groups have a limited Scope (Workspace only).
Our Groups are Cross Workspace and can contain applications from Multiple Workspaces.
We finally assign LDAP users to those Groups.
All the Meta Information is stored in DB tables
We also use a lot of the Apex Dictionary tables to Get Application info
Where i am now Stuck
We now have created a Single Lauch Point (New App) to simulate a SSO Portal
Users will log into this Apex App using their LDAP Credentials.
Once the user is successfully Authenticated by LDAP, we check all the Groups the User Belongs to and Populate the Launch Page with Links for the Apps the user has access.
Now rather than Point the Link to Page 101 which is the login page we point the same to the Main Page (Page 1).
When the user Clicks on the Link, he gets shown the Login Page Again.
We do not want the user to Authenticate again as this defeats the Purpose.
Any sort of Pointers most appreciated.
Please refer following discussion:
Single authentication for all applications in the workspace.
Of the solutions mentioned in the discussion above I have used following:
http://apps2fusion.com/at/64-kr/413-maintaining-authentication-between-apex-applications
which works for SSO using Session Cookie for Oracle APEX applications in ONE Workspace.
Hope it helps!
Regards,
Kiran

Apex Collections and dates

Apex Collections and Dates
I made an earlier posting today on the forum titled “‘ORA-01861: literal does not match format string’ error after my hosting company upgraded to Apex 3.2.” The issue relates to Apex collections and dates. Prior to the hosting company upgrading Apex 3.2 from 3.1 all was working OK. It seemed a reasonable assumption that the issue relates to the upgrade to 3.2. Having tested the code against another Apex 3.2 installation I am satisfied that the issue is not with Apex 3.2. That said, I am still getting the issue on the hosting site.
To demonstrate the issue to my hosting company and this forum, I put together a simple one page application that demonstrates the issue using the least amount of code.
I created a page with an ‘On Load – Before header” process that sets up an Apex Collection with a single value of ’20-FEB-2009’ in the c001 element as follows:
if apex_collection.collection_exists(p_collection_name=>'THEISSUE') then
apex_collection.delete_collection(p_collection_name=>'THEISSUE');
end if;
apex_collection.create_collection(p_collection_name => 'THEISSUE');
APEX_COLLECTION.ADD_MEMBER(
p_collection_name => 'THEISSUE',
p_c001 => '20-FEB-2009');
I added an SQL REPORT region to the page which uses the Apex Collection as follows:
select to_date(c001,'DD-MON-YYYY') testdate
from apex_collections
where collection_name='THEISSUE'
and to_date('20-FEB-2009','DD-MON-YYYY')
= to_date(c001,'DD-MON-YYYY')
When the page is run I get the ‘ORA-01861: literal does not match format string’ error.
If I remove the following from the SQL Report Region:
and to_date('20-FEB-2009','DD-MON-YYYY')
= to_date(c001,'DD-MON-YYYY')
and run the page, the date is displayed OK, i.e., c001 is converted to a date OK. This made me wonder whether it does not like the line to_date('20-FEB-2009','DD-MON-YYYY')? So I changed the where code for the report to :
and to_date(c001,'DD-MON-YYYY')
= to_date(c001,'DD-MON-YYYY')
i.e., convert c001 to a date and compare it to itself. The rationale being that if the c001 converts to a date OK, then comparing c001 converted to a date with itself should not give an error. It did it gave the same error ‘ORA-01861’
It would seem on my hosting site since the upgrade, that Apex and Oracle have problems with Apex Collection elements being converted to dates as part of the where clause.
Now my understating of Oracle Apex collections in simple terms is that all Apex collections are held in a single Oracle table managed by a series of Apex functions. Given that all Apex collections are in the same table, could the issue be with the Oracle database when it is creating its execution plan for the query? Could Oracle be including the value of c001 from other collections (i.e., when c001 is not in a date format ) in the initial stages of its execution plan?
I hope the above make sense and thanks in advance.
Ian

Scott,
I believe I have found the answer the statistics on WWV_FLOW_COLLECTIONS$ and WWV_FLOW_COLLECTION_MEMBERS$. are out of date and Oracle is doing a full table scan instead of using the indices to select only the c001 columns that belong to the given collection_id. If I change my simple example to store the date value in c050 it works ok. (In all probability this will be the only collection on the hosted database to use c050).
I have asked the hosting company to gather stats on all the apex tables.
Thanks for your help
Ian

How to create bar and pie graph from a backing bean in ADF

HI,
my requirement is to populate a line and pie graph based on a collection in a backing bean.
I got the solution for the bar graph with setTabularData(list data) method in one of the thread.
For bar graph,
i constructed the list for the setTabularData(list) method but it is not working with the line and pie graph.Coul'd you explain why?..
Is it different for the line and pie graph.I don't want to use adf bindings.
thanks in advance.
Anil.G

HI,
my requirement is to populate a line and pie graph based on a collection in a backing bean.
I got the solution for the bar graph with setTabularData(list data) method in one of the thread.
For bar graph,
i constructed the list for the setTabularData(list) method but it is not working with the line and pie graph.Coul'd you explain why?..
Is it different for the line and pie graph.I don't want to use adf bindings.
thanks in advance.
Anil.G

Few questions about apex + epg and cookie blocked by IE6

Hi,
I would like to ask a few questions about apex and epg.
I have already installed and configured apex 3.2 on oracle 10g (on my localhost - computer name 'chen_rong', ip address -192.168.88.175 ), and enable anonymous access xdb http server.
now,
1. I can access 'http://chen_rong' , 'http://localhost' , 'http://192.168.88.175' without input username / password for realm 'XDB' in IE6;
2. I can access 'http://localhost/apex/apex_admin' , 'http://192.168.88.175/apex/apex_admin' , and I can be redirected into apex administation page after input admin/<my apex admin password> for realm 'APEX' in IE6;
3. I can access 'http://chen_rong/apex/apex_admin' in IE6, but after input admin/password , I can not be redirected into administation page, because the cookie was blocked by IE6.
then, the first question is :
Q1: What is the difference among 'http://chen_rong' , 'http://localhost' , 'http://192.168.88.175' ? I have already include site 'chen_rong' into my trusted stes! why the cookie was blocked by IE6. I have already tried firefox and google browser, both of them were ok for 'chen_rong', no cookie blocked from site 'chen_rong'!
and,
1. I have tried to use the script in attachment to test http authentication and also want to catch the cookie by utl_http .
2. please review the script for me.
3. I did:
SQL> exec show_url('http://localhost/apex/apex_admin/','ADMIN','Passw0rd');
HTTP response status code: 401
HTTP response reason phrase: Unauthorized
Please supplied the required Basic authentication username/password for realm XDB for the Web page.
Web page http://localhost/apex/apex_admin/ is protected.
MS-Author-Via: DAV
DAV: 1,2,<http://www.oracle.com/xdb/webdav/props>
Server: Oracle XML DB/Oracle Database
WWW-Authenticate: Basic realm="XDB"
Date: Tue, 04 Aug 2009 02:25:15 GMT
Content-Type: text/html; charset=GBK
Content-Length: 147
======================================
PL/SQL procedure successfully completed
4. I also did :
SQL> exec show_url('http://localhost/apex/apex_admin/','ANONYMOUS','ANONYMOUS');
HTTP response status code: 500
HTTP response reason phrase: Internal Server Error
Check if the Web site is up.
PL/SQL procedure successfully completed
SQL> exec show_url('http://localhost/apex/apex_admin/','SYSTEM','apexsite');
HTTP response status code: 401
HTTP response reason phrase: Unauthorized
Please supplied the required Basic authentication username/password for realm APEX for the Web page.
Web page http://localhost/apex/apex_admin/ is protected.
Content-Type: text/html
Content-Length: 147
WWW-Authenticate: Basic realm="APEX"
======================================
PL/SQL procedure successfully completed
my second questions is :
Q2: After I entered into realm 'XDB', I still need went into realm'APEX'. how could I change the script show_url to accomplish these two tasks and successfully get the cookie from site.
the show_url script is as following:
CREATE OR REPLACE PROCEDURE show_url
(url IN VARCHAR2,
username IN VARCHAR2 DEFAULT NULL,
password IN VARCHAR2 DEFAULT NULL)
AS
req UTL_HTTP.REQ;
resp UTL_HTTP.RESP;
name VARCHAR2(256);
value VARCHAR2(1024);
data VARCHAR2(255);
my_scheme VARCHAR2(256);
my_realm VARCHAR2(256);
my_proxy BOOLEAN;
cookies UTL_HTTP.COOKIE_TABLE;
secure VARCHAR2(1);
BEGIN
-- When going through a firewall, pass requests through this host.
-- Specify sites inside the firewall that don't need the proxy host.
-- UTL_HTTP.SET_PROXY('proxy.example.com', 'corp.example.com');
-- Ask UTL_HTTP not to raise an exception for 4xx and 5xx status codes,
-- rather than just returning the text of the error page.
UTL_HTTP.SET_RESPONSE_ERROR_CHECK(FALSE);
-- Begin retrieving this Web page.
req := UTL_HTTP.BEGIN_REQUEST(url);
-- Identify yourself.
-- Some sites serve special pages for particular browsers.
UTL_HTTP.SET_HEADER(req, 'User-Agent', 'Mozilla/4.0');
-- Specify user ID and password for pages that require them.
IF (username IS NOT NULL) THEN
UTL_HTTP.SET_AUTHENTICATION(req, username, password, 'Basic', false);
END IF;
-- Start receiving the HTML text.
resp := UTL_HTTP.GET_RESPONSE(req);
-- Show status codes and reason phrase of response.
DBMS_OUTPUT.PUT_LINE('HTTP response status code: ' || resp.status_code);
DBMS_OUTPUT.PUT_LINE
('HTTP response reason phrase: ' || resp.reason_phrase);
-- Look for client-side error and report it.
IF (resp.status_code >= 400) AND (resp.status_code <= 499) THEN
-- Detect whether page is password protected
-- and you didn't supply the right authorization.
IF (resp.status_code = UTL_HTTP.HTTP_UNAUTHORIZED) THEN
UTL_HTTP.GET_AUTHENTICATION(resp, my_scheme, my_realm, my_proxy);
IF (my_proxy) THEN
DBMS_OUTPUT.PUT_LINE('Web proxy server is protected.');
DBMS_OUTPUT.PUT('Please supply the required ' || my_scheme ||
' authentication username/password for realm ' || my_realm ||
' for the proxy server.');
ELSE
DBMS_OUTPUT.PUT_LINE('Please supplied the required ' || my_scheme ||
' authentication username/password for realm ' || my_realm ||
' for the Web page.');
DBMS_OUTPUT.PUT_LINE('Web page ' || url || ' is protected.');
END IF;
ELSE
DBMS_OUTPUT.PUT_LINE('Check the URL.');
END IF;
-- UTL_HTTP.END_RESPONSE(resp);
-- RETURN;
-- Look for server-side error and report it.
ELSIF (resp.status_code >= 500) AND (resp.status_code <= 599) THEN
DBMS_OUTPUT.PUT_LINE('Check if the Web site is up.');
UTL_HTTP.END_RESPONSE(resp);
RETURN;
END IF;
-- HTTP header lines contain information about cookies, character sets,
-- and other data that client and server can use to customize each
-- session.
FOR i IN 1..UTL_HTTP.GET_HEADER_COUNT(resp) LOOP
UTL_HTTP.GET_HEADER(resp, i, name, value);
DBMS_OUTPUT.PUT_LINE(name || ': ' || value);
END LOOP;
-- Read lines until none are left and an exception is raised.
--LOOP
-- UTL_HTTP.READ_LINE(resp, value);
-- DBMS_OUTPUT.PUT_LINE(value);
--END LOOP;
UTL_HTTP.GET_COOKIES(cookies);
dbms_output.put_line('======================================');
FOR i in 1..cookies.count LOOP
IF (cookies(i).secure) THEN
secure := 'Y';
ELSE
secure := 'N';
END IF;
-- INSERT INTO my_cookies
-- VALUES (my_session_id, cookies(i).name, cookies(i).value,
-- cookies(i).domain,
-- cookies(i).expire, cookies(i).path, secure, cookies(i).version);
dbms_output.put_line('site:'||url);
dbms_output.put_line('cookies:');
dbms_output.put_line('name:'||cookies(i).name);
dbms_output.put_line('value:'||cookies(i).value);
dbms_output.put_line('domain:'||cookies(i).domain);
dbms_output.put_line('expire:'||cookies(i).expire);
dbms_output.put_line('path:'||cookies(i).path);
dbms_output.put_line('secure:'||secure);
dbms_output.put_line('version:'||cookies(i).version);
END LOOP;
UTL_HTTP.END_RESPONSE(resp);
EXCEPTION
WHEN UTL_HTTP.END_OF_BODY THEN
UTL_HTTP.END_RESPONSE(resp);
END;
/

I use oracle database enterprise edtion 10.2.0.3. I have already figured out the epg on 10.2.0.3 to support apex 3.2.
And as I described above, the apex site works fine for ip address , and localhost. but the cookie will be blocked by IE6, if I want to access the site by 'http://computername:port/apex/apex_admin'. This problem does not occured in firefox and google browser. Could someone give me answer?

Problem in Server Admin: cpu and network graphs not updated or empty after lion server update

Hi!
Just for archive purpouses because i've already solved that!
After upgrading from OSX Server 10.7 to 10.7.1 my CPU and Network graphs in Server Admin stop being updated.
In 24h the graphs where blank (disk usage graph seem to keep working).
First i read about "what is the application responsible for this"; it's called ServerPerfLog, and you can see if it's running that way:
     # ps ax | grep ServerPerf
If you don't see anything else than your own "grep", that means that no application is running, no data is being collected.
     41324 s000 R+     0:00.00 grep ServerPerf
A positive response for this (meaning that the service is running) should be something like that (2 lines: your grep and the service app itself):
     94   ?? Ss     0:04.71 /usr/libexec/ServerPerfLog
     41344 s000 R+     0:00.00 grep ServerPerf
Later i read about "where is the config file for this service app", and you can find it here:
     /System/Library/LaunchDaemons/com.apple.ServerPerfLog.plist
If you edit this config file, check that the "Key > Disabled" is set to "False"
     # vi /System/Library/LaunchDaemons/com.apple.ServerPerfLog.plist
        <key>Disabled</key>
        <false/>
After that, i try to launch the service that updates this graphs again, by hand, performing the following command:
     # sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.ServerPerfLog.plist
And the service got launch!!! yeeeepa!! i see a first update in graph data.
Also the "ps" query reply that the service was running!!
The bad things came a day after, when i saw that the graphs stop again....
I check if the service was running executing again the "ps" command, and that show me that the service was stopped again; no ServerPerfLog process was running.
But r e l a x, because the process hang because of a permissions problem.
You should know, I run "Repair permissions" within "Disk Utilities" over the running system disk, eeee... voila!
I hope that helps someone to get his fancy graphs back!
Regards,
t

You are God like!!! Wooo hooo! Thanks bud!

Excel & ActiveX: Insert arbitrary columns from 2D array and create graph problems

Hi there,
I want to insert data from either a 1D or 2D array from LabView into Excel and create graphs.
I used the information from the following example:
http://www.ni.com/example/28934/en/
and was able to create a new Excel file (I'm using Excel 2010), writing data from an 1D array to a column in excel by creating a while loop and using the first element of the array to write it to a specific cell. I use the counter of the loop to write to the next cell when the loop starts over and always delete the first value, which I write to the cell, from the array until it is empty.
Now I also would like to write a 2D array - so the first column in Excel should be the first column from the array and so. Here I cannot use the loop counter directly as Excel only counts 1,2,... for the rows, but uses A,B,... to count columns. Also I do not know in advance how many columns my 2D array will contain, so creating a lookup table like (A means 1, B means 2,...) is not really an option (except there really is no other way). Is there a possibilty to convert numbers into letters or some way to 'explain' to the program that column 2 in the array means column B in Excel for example, or is there a way to insert new columns?
I figured out how to add new Worksheets and as I also need to create a certain number of Worksheets and I know that on standard 3 sheets are present when creating the file, I use the 'add' methode to create every new worksheets before worksheet 3 - I could use the same methode to create new columns in Excel, but so far I didn't find a methode to do so. Or is there a way to enter the whole 2D array at once?
Then I'd like to create a graph (in case of the 1D arrays a bar plot, when using 2D arrays a 3D plot) to view the data. I found this example:
http://www.ni.com/newsletter/51339/en/
-> as I do not have the toolkit I'd like to do it using ActiveX directly, so I tried to do things like shown under the headline 'DIY ActiveX/.NET'
I tried to load the snippet to a new Excel file but got the error message 'microsoft.office.interop.excel.dll not found' and hence the code is not working. That confuses me a little as I would guess when this dll is not present I cannot access Excel from LabView at all, though my understanding of what I'm really doing so far is quiet limited. ;-)
Also - as far as I understand from the snippet - when creating a new chart object I should be able the create methodes for it, however when I do a right click on the chart object of an ActiveX Worksheet symbol there are none listed.
To explain my problems better I added a snippet showing my two problems: The inner of the two while loops shows how I import a 1D array. In the outer loop I seperate the columns. I know that currently this is not working as all data end up in column A of the Excel sheet - so I would need to convert the number of the outer counter to A, B,... or find a different solution.
Moreover on the snippet I placed an ActiveX Worksheet Property with the Chart Object - as I can see the difference to the Chart Object in the example code from the last link above is the color. However I'm not sure what that means and how to change/ solve this.
And just to make sure - I know this way the VI does not run as the Chart Object is placed completely wrong - I just did it, so it is included in the snippet.
I'd be thankful for any suggestions,
Thanks!
Solved!
Go to Solution.
Attachments:
ExcelAreaScan.png ‏60 KB

Hello everyone and thanks for the answers.
I only have the LabView Student Edition available here - is the toolkit included in it too. How can I check if it is installed/ available and in case it is installed - where can I find it?
Today I had time to take a look at the example
Create via ActiveX Labview a XY Scatter plot graph on an excel sheet
It almost does what I want in terms of creating a graph. The only problem I could not fix, is that in this example a sheet is created where only the graph is present. i'd like to add the graph to a previously created worksheet. Today I tried get this working but it seems I stilll don't really understand what I'm doing, I'll post a snippet of my code as soon as I can access the PC with LabView on it again.
I also took a look at the other example for inserting 2D attays - it seems to be what I need, I just had no time so far to test it, I'll post an update when I could test it.
Thanks for the help so far!

Read data from XML file and plot graph on Ms Words

Hi,
I'm using Visual Studio 2010, what I want to do is written in the title.
so far i was able read and plot graph on a Form but i unable to use the same method on Crystal Reporting.
The method plotting in Crystal Reporting is complicated and it require a fix data set or database which is not suitable for my case because every time the number of column and row or data will be different. (this is what i think base on what i found)
is there a way for me to display the output on a ms words?
and what is the method.
thanks.

Hi Huangcongmazhananzi,
Based on your description, I’m afraid that it is not the correct forum for this issue, since this forum is to discuss the VS IDE.
I might not have the correct detailed answer you need, but I might lead you into the right direction to solve your problem.
If this issue is related to the Windows Forum app, this forum would be better:
http://social.msdn.microsoft.com/Forums/windows/en-US/home?category=windowsforms
But if it is related to the Crystal Reporting, you could post the issue here:
http://forums.sdn.sap.com/forum.jspa?forumID=313&start=0
is there a way for me to display the output on a ms words?
If it is related to the Office, maybe you could select the correct forum here:
http://social.msdn.microsoft.com/Forums/office/en-US/home?category=officedev
Best Regard,
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

How does Apex access and manage db objects in other schemas?

I'm looking for a description of how Apex accesses and manages database objects in other schemas.
I'm sure I've seen such a description somewhere earlier but am unable to find it again...

Hi Rene,
When you are connected to sqlworkshop, it is basically connected to the sceham owner of the workspace. If you execute the query
select sys_context( 'userenv', 'current_schema' ), user, username from user_users;you would see the schema and user(currently connected) and schema owner through which you have logged in. The user will have all the privileges granted to schema owner. So basically you get connected through APEX_PUBLIC_USER and it has all the privileges of the schema owner.
In order to run scripts in another schema you would need grants on other schema same like you are connected to user A through sqlplus and wants to create objects in schema B. For example lets say you want to create a table in schema B and you have create table privileges in scehma B , you can execute command create table B.emp as select * from A.emp;
I hope this answers your question.
Regards,
Manish

Prepare for 1z0-402 and 1z0-403 with CentOS?

Hi
Can I prepare for 1z0-402 and 1z0-403 (Oracle Enterprise Linux Administrator Certified Associate) with CentOS? Because there are no free security updates for Oracle Linux.

Philippe Ludwig wrote:
Hi
Can I prepare for 1z0-402 and 1z0-403 (Oracle Enterprise Linux Administrator Certified Associate) with CentOS? Because there are no free security updates for Oracle Linux.IMHO The security updates are relatively unimportant from an exam viewpoint.
This is RHEL/OEL 4 based, so centos or OEL or RHEL could be used as appropriate. They important thing to note is the '4' .. which is now a little ancient ... some things a little different in '5' and '6'. The exam could usefully do with a makeover IMHO.

Oracle Linux Administrator Certified Associate: 1Z0-402 and 1Z0-403

Hi
there is a study guide available soon Oracle Enterprise Linux Administrator Certified Associate Exam Guide (Exams 1z0-402 and 1z0-403), that why I will take exam ;-)

Unfortunately LPIC expires after 5 years unless you take a higher level or retake same level .....
RHCT similarly.
The Oracle exam certification relates to OEL/RHEL 4 ... which is a bit oldhat rather than redht nowadays. The advantage for you is it is an easy win, the disadavantage is it doen't really say much mor eabout yourself. RHSA on RHEL 6 might suit and say more .... but might be harder to gain. Any it wouldn't help any Oracle Partnership points iof that was important. However as pointed out you should be able to waiver 1z0-402

Suggestions about interface: graph, directed and undirected graph

Hello all,
I'm having some doubts about the right 'choice' of interfaces. I'm designing a little library for graphs and I was thinking about the difference between directed and undirected graphs, and how I should reflect this in the library. My apologies for my bad English.
There is a small, but elegant, difference between directed and undirected graphs. Therefor, I don't know if it's worth to distuingish this difference in interfaces or not. I'll explain the difference by example. Usually, you can ask a directed graph the following queries:
- all out-edges of a node + the total of such edges (outdegree)
- all in-edges of a node + indegree
- the successors of a node
- the predecessors of a node
The same questions can be asked to a undirected graph, but the in-edges and the out-edges of a node are equal, the successors and the predecessors are equal, etc... Thats basically the only difference between directed and undirected graphs.
I found some solutions to define graphs, directed graphs and undirected graphs by means of interfaces.
[1] one interface, duplicate methods, no tagging interfaces
public interface Graph {
    Set getOutEdges(Node node);
    int getOutDegree(Node node);
    Set getinEdges(Node node);
    int getinDegree(Node node);
    Set getSuccessors(Node node);
    Set getPredecessor(Node node);
    boolean isDirected(); // no tagging interface
}[2] one interface, duplicate methods, tagging interfaces
public interface Graph {
    Set getOutEdges(Node node);
    int getOutDegree(Node node);
    Set getinEdges(Node node);
    int getinDegree(Node node);
    Set getSuccessors(Node node);
    Set getPredecessor(Node node);
public DirectedGraph extends Graph { } // tagging interface
public UndirectedGraph extends Graph { } // tagging interface[3] three interfaces
public interface Graph {
public interface DirectedGraph extends Graph {
    Set getOutEdges(Node node);
    int getOutDegree(Node node);
    Set getinEdges(Node node);
    int getinDegree(Node node);
    Set getSuccessors(Node node);
    Set getPredecessor(Node node);
public interface UndirectedGraph extends Graph {
    Set getTouchingEdges(Node node);
    int getdegree(Node node);
    Set getNeighbors(Node node);
}In the first solution, you dont know at compile time whether a graph is directed or undirected. However, it is very elegant for algorithms, since a lot of algorithms work for directed and undirected graphs. The main disadvantage of this solution is that you have duplicate functions in case of of undirected graphs: getOutEdges and getInEdges return the same set, etc.
The difference between the first and the second solution is that the second solutions gives a way to detect whether a graph is directed or undirected at compile-time.
The third solution has two seperate interfaces. This is much logical, and you know the graphtype at compile-time. However, this approach might lead to bloated code, as the algoritms for undirected and directed graphs now have two graphtypes (this can ofcourse be fixed by itroducing some kind of decorator, which in fact simulates the first solution).
As I don't have much experience in design, I can't forsee any big problems or disadvantes of one of the approaches. Therefor, I would like to ask for your opinion. What approach is most common and best practice?
Thanks in advance.

I would tend to go with true inheritance for this case. There is a strong ISA relationship between a graph and uni-directional and bi-directional graphs. Programming to an interface (as in the Lyskov substitution principle) will give you a parallel heirachy of interfaces and implementations. This can become a problem if you start out not knowing what interface needs to be published, but in the case of graphs this should not be a problem. With a heirachy all the shared code can be written once. In this case the specialized code will just simplify calling more general code in the parent class.
If all your graphs fit into memory then the implemenation should not be a problem. I used to work with map data where the graph does not fit into memory. Then you have to be careful about your interface or you will be getting calls that cannot be properly optimized "behind the scenes". Another specialization is in game programming where nodes are not actually expanded until they are "arrived at". Then you have to keep information about what parts of the structure are fleshed out and which are provisional.

Is it legal to create packaged APEX applications and sell them?

Is it legal to create packaged APEX applications and sell them to Oracle DB licensed clients?
A.

No licensing applies to any environment where you have a live database. The exception is that you can try a product without license, but as soon as development of a product of developing/testing of an in-house solution is done, you need to be licensed. Being a partner changes this slightly assuming all parties involved are partners (one sigle tester from the outside shifts it back to full license mode).
Another situation where license is not needed is to use XE for which no license is required.
Yet one more way to have al low cost is to use Amazon AWS to set up an image with an included license. The cost per hour is really low so it may be a good model to not have to pay everything upfront.
You can also reduce license cost by using named user licensing in development assuming there are few people who ned to access the database. Though there are minimums of number of named user licenses you can have depending on edition of the database.
Overall, knowing your licensing requirements is key. The defense "We didn't know" has been tried before and has not proven to help at all. The cost of an audit will often be a CLM for the person responsible to pay the licenses.

Line and stock graph combination

Is it possible to have a line and stock graph combination?
I need to have a graph that shows high, low, and a line that connects on the average(what I would be putting under close in the stock graph).
Is there some way to set the stock graph to do this, or is it possible to have overlapping graphs?
I'm using report builder 10.1.2.
EDIT: Also is it not possible to make reference lines in stock graphs?
Edited by: 878576 on Aug 10, 2011 6:58 AM

Is it possible to have a line and stock graph combination?
I need to have a graph that shows high, low, and a line that connects on the average(what I would be putting under close in the stock graph).
Is there some way to set the stock graph to do this, or is it possible to have overlapping graphs?
I'm using report builder 10.1.2.
EDIT: Also is it not possible to make reference lines in stock graphs?
Edited by: 878576 on Aug 10, 2011 6:58 AM

APEX 402 and AnyChart graphing

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