PL/SQL Counter for HTMLDB - Application Express - Survey Counter

I wonder if somebody could help me to clarify the HowTo on this Survey.
Based on:
http://www.oracle.com/technology/products/database/application_express/index.html
http://www.oracle.com/technology/oramag/oracle/06-mar/o26browser.html
I follow up however that is not exactly what I like to see in my Survey. I like to make something more elegant and flexible.
On this example he put 10 questions/ page. I like to use 1 Question / Page.
And I like to extend to more than 10 pages. for example 20.
My question to the forums is:
If I create an application with Only 3 pages [ Welcome, Survey, End ]
And the main page for the Survey is the second page.
How would programatically be the logic to:
Start the Welcome page => Setup variable counter = 1
Then using sessions with a button click on Start Survey.
Survey Page check for the existence of counter variable if exist retrieve the Question from the Questions table and the properly Answer will be recorded.
This answer could include comments, and the Rating could be an LOV.
After the Question 1 is asnwered then the Next Button on the Page 2 Call the same page 2. If the Questions is the max number of questions [20] then go to the End or Summary Page. if not just increase the counter variable then retrieve the next question.
Am I asking to much ???. I'm just starting on PL/SQL and HTMLDB I'm not sure how to manipulate those variables. I've been trying but I'm stuck.
Thanks in Advance for your Help.
Dino.
http://htmldb.oracle.com/pls/otn/f?p=42721:1:4875344191023058749:::::
PS -> As soon as have the answer will post it public in htmldb.oracle.com =)

Move this over to :
Oracle Application Express (APEX)

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To Oracle Application Express Development Team,
Yesterday I installed Oracle Application Express 3.2.0.00.27.
While doing my r&d, I came across one problem in SQL Command.
For example I wanted to run sql "select * from tab"
When I checked "Autocommit" checkbox it worked fine.
But when I unchecked the "Autocommit" checkbox it gave me following error:
ORA-01003: no statement parsed
Please check post
http://www.oraclebrains.com/2009/03/sql-command-problem-in-application-express-3200027/ for more details.
Cheers

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Fixed Size 1288820 bytes
Variable Size 264242572 bytes
Database Buffers 331350016 bytes
Redo Buffers 2904064 bytes
Database mounted.
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PL/SQL procedure successfully completed.
PL/SQL procedure successfully completed.
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Hi folks. I would appreciate any help I could get with this problem - it's a fairly serious one and I'm hoping for some feedback.
We are using HTMLDB 2.0 and are using Oracle Applications. We have a rogue developer who has a bit of a control problem - he likes to run UPDATE, DELETE, and INSERT statements against our production database. However, he does develop HTMLDB reports for us and does a good job with that. Is there any way we can limit his developer account in HTMLDB so that he can't run these kinds of queries in the SQL Editor in HTMLDB?
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Thanks so much!
Steve

Are queries run in the SQL Editor logged?
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Name                                      Null?    Type
ID                                        NOT NULL NUMBER
COMMAND                                            CLOB
PARSED_SCHEMA                                      VARCHAR2(30)
CREATED_BY                                         VARCHAR2(255)
CREATED_ON                                         DATE
SECURITY_GROUP_ID                         NOT NULL NUMBERThe security_group_id maps to the workspace.
To get the security group id for your workspace, run
select provisioning_company_id,short_name
from flows_020000.wwv_flow_companies
where provisioning_company_id>10;Then you can keep an eye for
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Dead lock detected in alert log for HTMLDB application

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Thanks in advance,
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*** SESSION ID:(289.143) 2005-11-17 10:35:48.976
DEADLOCK DETECTED
Current SQL statement for this session:
DELETE FROM WWV_FLOW_DATA WHERE FLOW_INSTANCE = :B1 AND ITEM_ID IN (SELECT ID FROM WWV_FLOW_PAGE_PLUGS WHERE FLOW_ID = :B3 AND PAGE_ID = :B2 AND PLUG_SOURCE_TYPE IN ( 'SIMPLE_CHART', 'UPDATABLE_SQL_QUERY', 'DBMSSQL_CURSOR', 'FUNCTION_RETURNING_DBMSSQL_CURSOR', 'FUNCTION_RETURNING_SQL_QUERY_CACHED', 'FUNCTION_RETURNING_SQL_QUERY', 'STRUCTURED_QUERY', 'SQL_QUERY'))
----- PL/SQL Call Stack -----
object line object
handle number name
7000000bb989300 228 package body FLOWS_020000.WWV_FLOW_DISP_PAGE_PLUGS
7000000bbc922c8 8961 package body FLOWS_020000.WWV_FLOW
7000000bbd00000 236 procedure FLOWS_020000.F
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or from issuing incorrect ad-hoc SQL. The following
information may aid in determining the deadlock:
Deadlock graph:
---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name process session holds waits process session holds waits
TX-00050005-00756507 308 289 X 295 276 X
TX-0002000f-006fc0df 295 276 X 308 289 X
session 289: DID 0001-0134-00000005 session 276: DID 0001-0127-00000002
session 276: DID 0001-0127-00000002 session 289: DID 0001-0134-00000005

Rakesh,
Please see if (ora-600 [12333] / ora-3137 [12333] Troubleshooting [ID 828123.1]) and/or (ORA-600 [12333] "Fatal Two-Task Protocol Violation" [ID 35928.1]) is applicable.
Did you try to bounce the database and see if you can reproduce the issue?
If you still encounter the same error, please log a SR.
Thanks,
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Dynamic SQL queries in HTMLDB application

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Regards
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Best beginner book for Oracle Application Express?

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Minimum resources for Oracle Application Express

Hi,
I'm new to the forum, and a bit confuse here trying to find an answer to what supposedly is a simple question:
What kind of resources do I have to have to develop and deploy screens with Oracle Application Express?
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I have this Oracle application all created in forms that we are planning to give to our customers in a web based.
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Use sql notification for console application C#

I have developed ucma C# console application which sends IM to users.
Now I want to send IM if any new entry is added in the table
So i want to use query notification .
I have enabled service broker on my database .
And I have added code for sqldepedency in my code file.
as follows.
public static void Main(string[] args)
UCMASampleInstantMessagingCall ucmaSampleInstantMessagingCall =
new UCMASampleInstantMessagingCall();
ucmaSampleInstantMessagingCall.connectionfunction();
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string connectionString = @"Data Source=PIXEL-IHANNAH2\PPINSTANCE;User ID=sqlPPUser;Password=ppuser1;Initial Catalog=Ian;";
SqlDependency.Stop(connectionString);
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SqlCommand sqlCommand = new SqlCommand(statement, sqlConnection);
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SqlDependency dependency = new SqlDependency(sqlCommand, null, 0);
SqlDependency.Start(connectionString);
dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
ucmaSampleInstantMessagingCall.run()
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Now I want to run this application in the background , so f any new entry is added it will notify my C# application and call run function.
i tried above code but it was not working.
Sample code is avaliableon net but it is for form application and we can see output if we run the form application .
so if i want to run my C# application what should I do?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Security.Principal;
using System.Security.Cryptography.X509Certificates;
using System.Net;
using System.Threading;
using System.Diagnostics;
using Microsoft.Rtc.Collaboration;
using Microsoft.Rtc.Signaling;
using System.Runtime.InteropServices;
//using Microsoft.Rtc.Collaboration.Sample.Common;
namespace UserPresence
class UCMASampleInstantMessagingCall
#region Locals
// The information for the conversation and the far end participant.
// Subject of the conversation; will appear in the center of the title bar of the
// conversation window if Microsoft Lync is the far end client.
private static String _conversationSubject = "The Microsoft Lync Server!";
// Priority of the conversation will appear in the left corner of the title bar of the
// conversation window if Microsoft Lync is the far end client.
private static String _conversationPriority = ConversationPriority.Urgent;
// The Instant Message that will be sent to the far end.
private static String _messageToSend = "Hello World! I am a bot, and will echo whatever you type. " +
"Please send 'bye' to end this application.";
private InstantMessagingCall _instantMessaging;
private InstantMessagingFlow _instantMessagingFlow;
//private ApplicationEndpoint _applicationEndpoint;
private UserEndpoint _userendpoint;
private UCMASampleHelper _helper;
private static SqlDependency dependency;
private static string connectionString = @"Data Source=MyServer;Initial Catalog=MyDatabase;Integrated Security=SSPI";
// Event to notify application main thread on completion of the sample.
private AutoResetEvent _sampleCompletedEvent = new AutoResetEvent(false);
#endregion
#region Methods
/// <summary>
/// Instantiate and run the InstantMessagingCall quickstart.
/// </summary>
/// <param name="args">unused</param>
//private string _helper;
//UCMASampleHelper _helper = new UCMASampleHelper();
public static void Main(string[] args)
UCMASampleInstantMessagingCall ucmaSampleInstantMessagingCall =
new UCMASampleInstantMessagingCall();
var connection = new SqlConnection(connectionString);
SqlDependency.Start(connectionString);
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
SqlCommand command = new SqlCommand(
"select col1 from dbo.tblTest",
connection);
// Create a dependency (class member) and associate it with the command.
dependency = new SqlDependency(command, null, 5);
// Subscribe to the SqlDependency event.
dependency.OnChange += new OnChangeEventHandler(onDependencyChange);
// start dependency listener
SqlDependency.Start(connectionString);
//ucmaSampleInstantMessagingCall.Run();
private static void onDependencyChange(Object o, SqlNotificationEventArgs args)
run();
private void Run()
// Initialize and startup the platform.
Exception ex = null;
try
// Create the UserEndpoint
_helper = new UCMASampleHelper();
_userendpoint = _helper.CreateEstablishedUserEndpoint();
Console.Write("The User Endpoint owned by URI: ");
Console.Write(_userendpoint.OwnerUri);
Console.WriteLine(" is now established and registered.");
List<string> _Users = new List<string>();
_Users.Add("sip:[email protected]");
_Users.Add("sip:[email protected]");
foreach (string useruri in _Users)
// Setup the conversation and place the call.
ConversationSettings convSettings = new ConversationSettings();
convSettings.Priority = _conversationPriority;
convSettings.Subject = _conversationSubject;
// Conversation represents a collection of modes of communication
// (media types)in the context of a dialog with one or multiple
// callees.
//Convers conver =new ConversationParticipant
Conversation conversation = new Conversation(_userendpoint, convSettings);
InstantMessagingCall _instantMessaging = new InstantMessagingCall(conversation);
// Call: StateChanged: Only hooked up for logging. Generally,
// this can be used to surface changes in Call state to the UI
_instantMessaging.StateChanged += this.InstantMessagingCall_StateChanged;
// Subscribe for the flow created event; the flow will be used to
// send the media (here, IM).
// Ultimately, as a part of the callback, the messages will be
// sent/received.
_instantMessaging.InstantMessagingFlowConfigurationRequested +=
this.InstantMessagingCall_FlowConfigurationRequested;
// Get the sip address of the far end user to communicate with.
//String _calledParty = "sip:" +
// UCMASampleHelper.PromptUser(
// "Enter the URI of the user logged onto Microsoft Lync, in the User@Host format => ",
// "RemoteUserURI");
// Place the call to the remote party, without specifying any
// custom options. Please note that the conversation subject
// overrides the toast message, so if you want to see the toast
// message, please set the conversation subject to null.
// _instantMessaging.Conversation()
_instantMessaging.BeginEstablish(useruri, new ToastMessage("Hello Toast"), null,
CallEstablishCompleted, _instantMessaging);
catch (InvalidOperationException iOpEx)
// Invalid Operation Exception may be thrown if the data provided
// to the BeginXXX methods was invalid/malformed.
// TODO (Left to the reader): Write actual handling code here.
ex = iOpEx;
finally
if (ex != null)
// If the action threw an exception, terminate the sample,
// and print the exception to the console.
// TODO (Left to the reader): Write actual handling code here.
Console.WriteLine(ex.ToString());
Console.WriteLine("Shutting down platform due to error");
_helper.ShutdownPlatform();
// Wait for sample to complete
_sampleCompletedEvent.WaitOne();
// Just to record the state transitions in the console.
void InstantMessagingCall_StateChanged(object sender, CallStateChangedEventArgs e)
Console.WriteLine("Call has changed state. The previous call state was: " + e.PreviousState +
"and the current state is: " + e.State);
// Flow created indicates that there is a flow present to begin media
// operations with, and that it is no longer null.
public void InstantMessagingCall_FlowConfigurationRequested(object sender,
InstantMessagingFlowConfigurationRequestedEventArgs e)
Console.WriteLine("Flow Created.");
_instantMessagingFlow = e.Flow;
// Now that the flow is non-null, bind the event handlers for State
// Changed and Message Received. When the flow goes active,
// (as indicated by the state changed event) the program will send
// the IM in the event handler.
_instantMessagingFlow.StateChanged += this.InstantMessagingFlow_StateChanged;
// Message Received is the event used to indicate that a message has
// been received from the far end.
_instantMessagingFlow.MessageReceived += this.InstantMessagingFlow_MessageReceived;
// Also, here is a good place to bind to the
// InstantMessagingFlow.RemoteComposingStateChanged event to receive
// typing notifications of the far end user.
_instantMessagingFlow.RemoteComposingStateChanged +=
this.InstantMessagingFlow_RemoteComposingStateChanged;
private void InstantMessagingFlow_StateChanged(object sender, MediaFlowStateChangedEventArgs e)
Console.WriteLine("Flow state changed from " + e.PreviousState + " to " + e.State);
// When flow is active, media operations (here, sending an IM)
// may begin.
if (e.State == MediaFlowState.Active)
// Send the message on the InstantMessagingFlow.
_instantMessagingFlow.BeginSendInstantMessage(_messageToSend, SendMessageCompleted,
_instantMessagingFlow);
private void InstantMessagingFlow_RemoteComposingStateChanged(object sender,
ComposingStateChangedEventArgs e)
// Prints the typing notifications of the far end user.
Console.WriteLine("Participant "
+ e.Participant.Uri.ToString()
+ " is "
+ e.ComposingState.ToString()
private void InstantMessagingFlow_MessageReceived(object sender, InstantMessageReceivedEventArgs e)
// On an incoming Instant Message, print the contents to the console.
Console.WriteLine(e.Sender.Uri + " said: " + e.TextBody);
// Shutdown if the far end tells us to.
if (e.TextBody.Equals("bye", StringComparison.OrdinalIgnoreCase))
// Shutting down the platform will terminate all attached objects.
// If this was a production application, it would tear down the
// Call/Conversation, rather than terminating the entire platform.
_instantMessagingFlow.BeginSendInstantMessage("Shutting Down...", SendMessageCompleted,
_instantMessagingFlow);
_helper.ShutdownPlatform();
_sampleCompletedEvent.Set();
else
// Echo the instant message back to the far end (the sender of
// the instant message).
// Change the composing state of the local end user while sending messages to the far end.
// A delay is introduced purposely to demonstrate the typing notification displayed by the
// far end client; otherwise the notification will not last long enough to notice.
_instantMessagingFlow.LocalComposingState = ComposingState.Composing;
Thread.Sleep(2000);
//Echo the message with an "Echo" prefix.
_instantMessagingFlow.BeginSendInstantMessage("Echo: " + e.TextBody, SendMessageCompleted,
_instantMessagingFlow);
private void CallEstablishCompleted(IAsyncResult result)
InstantMessagingCall instantMessagingCall = result.AsyncState as InstantMessagingCall;
Exception ex = null;
try
instantMessagingCall.EndEstablish(result);
Console.WriteLine("The call is now in the established state.");
catch (OperationFailureException opFailEx)
// OperationFailureException: Indicates failure to connect the
// call to the remote party.
// TODO (Left to the reader): Write real error handling code.
ex = opFailEx;
catch (RealTimeException rte)
// Other errors may cause other RealTimeExceptions to be thrown.
// TODO (Left to the reader): Write real error handling code.
ex = rte;
finally
if (ex != null)
// If the action threw an exception, terminate the sample,
// and print the exception to the console.
// TODO (Left to the reader): Write real error handling code.
Console.WriteLine(ex.ToString());
Console.WriteLine("Shutting down platform due to error");
_helper.ShutdownPlatform();
private void SendMessageCompleted(IAsyncResult result)
InstantMessagingFlow instantMessagingFlow = result.AsyncState as InstantMessagingFlow;
Exception ex = null;
try
instantMessagingFlow.EndSendInstantMessage(result);
Console.WriteLine("The message has been sent.");
catch (OperationTimeoutException opTimeEx)
// OperationFailureException: Indicates failure to connect the
// IM to the remote party due to timeout (called party failed to
// respond within the expected time).
// TODO (Left to the reader): Write real error handling code.
ex = opTimeEx;
catch (RealTimeException rte)
// Other errors may cause other RealTimeExceptions to be thrown.
// TODO (Left to the reader): Write real error handling code.
ex = rte;
finally
// Reset the composing state of the local end user so that the typing notifcation as seen
// by the far end client disappears.
_instantMessagingFlow.LocalComposingState = ComposingState.Idle;
if (ex != null)
// If the action threw an exception, terminate the sample,
// and print the exception to the console.
// TODO (Left to the reader): Write real error handling code.
Console.WriteLine(ex.ToString());
Console.WriteLine("Shutting down platform due to error");
_helper.ShutdownPlatform();
#endregion
So i want to call run method when new entry is added in the database . and this application is not like any asp.net form application . In form application we display data when programs loads as like your RefreshDataWithSqlDependency
function . But in my application my application will run (send IM) when any new entry is added in the database . As I need running application to achieve notification , what kind of changes are required?

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Trevor Seward
Follow or contact me at...
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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kind regards
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