Never implemented exception handling in Stored Procedures

I have lots of stand alone stored procedures callled from .NET 20 programs that follow the following pattern. They runn against Oracle 10.2 on Win2003. The only deviiation is a couple where I insert to temptables. I specify a parameter for messages but don't know the best way to implement for Oracle as well as any tips on ODP.NET/oracle interactions error handling.
1. Is it recommended to implement exception handling in With Clauses?
2. If there is an exception in one cursor's SQL, how do I still execute the second?
3. Is it best in some circumstances to pass a null back to client and check for null in program?
From .NET programs I have run into a couple of problems.
4. TNS packet failure.
Anyways any suggestions or experiences are welcome.
CREATE OR REPLACE PROCEDURE   GET_SALES_DATA
                  ,   p_businessdate      in   date
                  ,   p_message         out varchar2
                  ,   p_rcSales             out sys_refcursor
                  ,   p_rInventory            out sys_refcursor
) is
open p_rcSales for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
open p_rcInventory for
with somedata as (select ...)
, someMoreData as (selct ...)
-- Main select
Select * from somedata sd inner join somemoredata smd on smd.key   = sd.key;
-- CODE NOT IMPLEMENTED
-- exception
-- when TOO_MANY_ROWS then select 'Error handling for future implementations' into p_message from dual ;
-- when NO_DATA_FOUND then select 'Error handling for future implementations. No data' into p_message from dual;
-- when others         then raise_application_error(-20011,'Unknown Exception in GET_SALES_DATA Function');
-- WHEN invalid_business_date then select 'Invalid: Business date is in the current work week.' into p_message from dual ;
END GET_SALES_DATA;Pseudocode'ish because Module level variables and properties have not been defined here for brevity.
Public Class WebPage1
PAge_Load
   GetData
End Class Data Access Layer
Public Class DAL
Public Sub GetOracleData()
            Dim conn As OracleConnection
                Try
                    conn = New OracleConnection
                Catch ex As Exception
                    Throw ex
                End Try
                Dim cmd As New OracleCommand
                With cmd
                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.Connection = conn
                End With
                cmd.Connection = conn
                Dim oparam As OracleParameter
                oparam = cmd.Parameters.Add("p_businessdate", OracleDbType.Date)
                oparam.Value = BusinessDate.ToString("dd-MMM-yy")
                oparam = cmd.Parameters.Add("p_message", OracleDbType.Varchar2, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rc_inven_csv", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcSales", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
                Dim Adapter As New OracleDataAdapter(cmd)
                Try
                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
                Catch ex As OracleException
                    HandleError("Exception Retrieving Oracle Data", ex, MethodInfo.GetCurrentMethod.Name, True)
                 Finally
                    If conn.State = ConnectionState.Open Then
                        conn.Close()
                    End If
                End Try
                dbMessages = cmd.Parameters("p_message").ToString
            End If
            arrStatusMessages.Add("Retrieved Oracle Data Successfully")
        End Sub
       ' Original Implementation ; No longer used
        Public function GetOracleData
           Dim conn As New OracleConnection
            conn.ConnectionString = dbconn.Connectionstring
             Dim cmd As New OracleCommand
                With cmd
                    conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString
                    cmd.CommandText = DATABASE.GetSalesData
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.Connection = conn
                End With
                cmd.Connection = conn
                Dim oparam As OracleParameter
                oparam = cmd.Parameters.Add("p_businessdate", OracleDbType.Date)
                oparam.Value = BusinessDate.ToString("dd-MMM-yy")
                oparam = cmd.Parameters.Add("p_message", OracleDbType.Varchar2, ParameterDirection.Output)
                             oparam = cmd.Parameters.Add("p_rcSales", OracleDbType.RefCursor, ParameterDirection.Output)
                oparam = cmd.Parameters.Add("p_rcInventory", OracleDbType.RefCursor, ParameterDirection.Output)
                Dim Adapter As New OracleDataAdapter(cmd)
                Try
                    Adapter.TableMappings.Add("Table", Sales)
                    Adapter.TableMappings.Add("Table1", Inventory)
                    Adapter.Fill(dsOracleData)
                dim dt as datatable = dsoracledata.tables("sales")
                If IsDataNull(dt) Then
                     _errorType = DBErrorType.NullData
                End If
                If isDataEmpty(dt) Then
                     _errorType = DBErrorType.EmptyData
                End If
                _hasError = False
            Catch oraEx As OracleException
                  _ExceptionText = oraEx.Message.ToString
                _errorType = DBErrorType.OracleException
#If DEBUG Then
                Throw oraEx
#End If
            Catch zeroEx As DivideByZeroException
                _ExceptionText = zeroEx.Message.ToString
                _errorType = DBErrorType.DivideByZeroException
#If DEBUG Then
                Throw zeroEx
#End If
            Catch oflowEx As OverflowException
                _ExceptionText = oflowEx.Message.ToString
                _errorType = DBErrorType.OverflowException
#If DEBUG Then
                Throw oflowEx
#End If
            Catch argEx As InsufficientMemoryException
                _ExceptionText = argEx.Message.ToString
                _errorType = DBErrorType.InsufficientMemoryException
#If DEBUG Then
                Throw argEx
#End If
            Catch nomemEx As OutOfMemoryException
                _ExceptionText = nomemEx.Message.ToString
                _errorType = DBErrorType.OutOfMemoryException
#If DEBUG Then
                Throw nomemEx
#End If
            Catch Ex As Exception
                _ExceptionText = Ex.Message.ToString
                _errorType = DBErrorType.GenericException
#If DEBUG Then
                Throw Ex
#End If
            Finally
                If conn.State = ConnectionState.Open Then
                    conn.Close()
                End If
            End Try
End class Error Class
Public Class Errors
       Public Sub ExitClass()
            Return
        End Sub
        ' 'blnWriteNow says when Error is critical and no further processing needs to be done by class, then write to event logs or text files and call exit class
        ' to return control back to webpage. This is my first time trying this way.
        Public Sub HandleError(ByVal friendlyMsg As String, ByVal objEx As Exception, ByVal methodInfo As String, Optional ByVal blnWriteNow As Boolean = False)
            If Not blnWriteNow Then Exit Sub
            Dim strMessages As String
            strMessages = arrStatusMessages
            'Send error email
            If blnSendEmails Then
                 SendMail("[email protected], strMessages. applicationname, " has thrown error. ")
            End If
          'Throw error for   debugging
            If blnThrowErrors Then
                        Throw New Exception(strMessages & vbCrLf & objEx.Message)
            End If
           ' Write to event log and if not available (shared hosting environment), write to text log
            If blnWriteNow Then
                If blnWriteToEvtLog Then
                    If blnCanWriteToEvtLog Then    'Program has write permission to log
                         WriteToEventLog(strMessages, _appname, EventLogEntryType.Error, appname)
                    Else
                        If Not Directory.Exists( appPath & "\log") Then
                            Try
                                Directory.CreateDirectory( appPath & "\log")
                            Catch ex As Exception
                                arrStatusMessages.Add("Cant't write to event log or create a directory")
                            End Try
                        End If
                    End If
                End If
            End If
        End Sub
End Class

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BluShadow wrote:
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That is right, you dont have my data and that is why I was suprised by your comment.
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Jun Li wrote:
Here you go. Thanks for your time.
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DECLARE @iCompanyId int
DECLARE @chLanguageCode char(4)
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DECLARE @vchCompanyName varchar(255)
DECLARE @vchAddress1 varchar(255)
DECLARE @vchAddress2 varchar(255)
DECLARE @vchAddress3 varchar(255)
DECLARE @vchCity varchar(255)
DECLARE @chRegionCode char(4)
DECLARE @chCountryCode char(4)
DECLARE @vchPostCode varchar(40)
DECLARE @vchPhoneNumber varchar(40)
DECLARE @vchEmailAddress varchar(255)
DECLARE @vchURL varchar(255)
DECLARE @iCompanyTypeCode int
DECLARE @iCompanySubTypeCode int
DECLARE @iFamilyId int
DECLARE @iParentId int
DECLARE @iPrimaryContactId int
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DECLARE @vchContactLastName varchar(255)
DECLARE @iDivisionCode int
DECLARE @iSICCode int
DECLARE @iMarketSector int
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DECLARE @vchDunnsNumber varchar(255)
DECLARE @iPhoneTypeId int
DECLARE @iAddressTypeId int
DECLARE @iSourceId int
DECLARE @iStatusId int
DECLARE @bValidAddress tinyint
DECLARE @iAccessCode int
DECLARE @bPrivate tinyint
DECLARE @vchUser1 varchar(255)
DECLARE @vchUser2 varchar(255)
DECLARE @vchUser3 varchar(255)
DECLARE @vchUser4 varchar(255)
DECLARE @vchUser5 varchar(255)
DECLARE @vchUser6 varchar(255)
DECLARE @vchUser7 varchar(255)
DECLARE @vchUser8 varchar(255)
DECLARE @vchUser9 varchar(255)
DECLARE @vchUser10 varchar(255)
DECLARE @chInsertBy char(10)
DECLARE @dtInsertDate datetime
DECLARE @tiLockRecord tinyint
DECLARE @tiRecordStatus tinyint
DECLARE @tireturnType tinyint
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Hi everybody,
which types of callable objects can define exceptions? I found an tutorial where Background Callable Object and External Service (BAPI/RFC) can define exceptions, but is it also possible for composite services or WebServices?
And how could I configure a WebService as a background Callable Object?
Thanks!
Stefan

Hi Stefan,
WebService Callable Object defines exception for sure! It has to be define in the WSDL though.
To define a WS Callable Object, you can have a look at <a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/44/4758351fcb1193e10000000a155369/frameset.htm">SAP Help</a>
Hope this helps,
David

RAISING EXCEPTION AND SHOWING TO USERS IN FORM BASED ON STORED PROCEDURE

I have a form based on stored procedure.
I want to handle exceptions in the stored procedure and show it to users.
Here is what i want to do.
I have a sku# field in the form and i want to validate it(against the database
table) in the procedure before inserting into the database.
I want to give a message to users when the validation fails.
How is this possible with the forms based on stored procedure?
Can i use javascript to do the same?
Thanks in Advance

I have a form based on stored procedure.
I want to handle exceptions in the stored procedure and show it to users.
Here is what i want to do.
I have a sku# field in the form and i want to validate it(against the database
table) in the procedure before inserting into the database.
I want to give a message to users when the validation fails.
How is this possible with the forms based on stored procedure?
Can i use javascript to do the same?
Thanks in Advance

Never implemented exception handling in Stored Procedures

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