Question

Update when NO_DATA_FOUND

Asked by: ksummers

I am selecting a field into my variable 'workmethod' but it does not ever seem to update the record with my variable, which I know is getting set based on the DBMS output.  What am I doing wrong??

    trackingperiod :=  substr(tracking_period,1,4) || ( substr(tracking_period,-4) -1 );

    SELECT work_method
      INTO workmethod
      from request_list_tracking
    where lender_number = RLT_Update.Lender_Number
      and tracking_type = '3'
      and tracking_period = trackingperiod
      and payee_code = RLT_Update.payee_code;
    EXCEPTION
      WHEN NO_DATA_FOUND THEN
        workmethod := '';

    update request_list_tracking
    set parcel_count = parcelcount, work_method = workmethod
    where lender_number = RLT_Update.Lender_Number
      and tracking_type = '3'
      and tracking_period = RLT_Update.Tracking_Period
      and payee_code = RLT_Update.payee_code;
 

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Asked On
2008-09-25 at 12:40:39ID23763960
Tags

PL/SQL

Topics

PL / SQL

,

Oracle 10.x

,

Oracle 3rd Party Tools

Participating Experts
2
Points
250
Comments
4

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Answers

 

by: angelIIIPosted on 2008-09-25 at 12:43:41ID: 22573155

>and tracking_period = trackingperiod
is the problem: your column name and the variable name are identical, which makes the column names takes precedence.

change the name of the variable:

v_trackingperiod :=  substr(v_tracking_period,1,4) || ( substr(v_tracking_period,-4) -1 ); 
    SELECT work_method 
      INTO v_workmethod
      from request_list_tracking
    where lender_number = RLT_Update.Lender_Number
      and tracking_type = '3'
      and tracking_period = v_trackingperiod
      and payee_code = RLT_Update.payee_code;
    EXCEPTION
      WHEN NO_DATA_FOUND THEN
        v_workmethod := ''; 
    update request_list_tracking
    set parcel_count = parcelcount, work_method = v_workmethod
    where lender_number = RLT_Update.Lender_Number
      and tracking_type = '3'
      and tracking_period = RLT_Update.Tracking_Period
      and payee_code = RLT_Update.payee_code;
 

                                              
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by: ishandoPosted on 2008-09-25 at 16:47:46ID: 22575099

Are you wanting to do:

begin
  trackingperiod :=  substr(tracking_period,1,4) || ( substr(tracking_period,-4) -1 );
  begin
    SELECT work_method INTO workmethod
    from request_list_tracking
    where lender_number = RLT_Update.Lender_Number
    and tracking_type = '3'
    and tracking_period = trackingperiod
    and payee_code = RLT_Update.payee_code;
  EXCEPTION
    WHEN NO_DATA_FOUND THEN
      workmethod := '';
  end;
 
  update request_list_tracking
  set parcel_count = parcelcount, work_method = workmethod
  where lender_number = RLT_Update.Lender_Number
  and tracking_type = '3'
  and tracking_period = RLT_Update.Tracking_Period
  and payee_code = RLT_Update.payee_code;
end;
 
 
or
 
 
begin
  trackingperiod :=  substr(tracking_period,1,4) || ( substr(tracking_period,-4) -1 );
 
  SELECT work_method INTO workmethod
  from request_list_tracking
  where lender_number = RLT_Update.Lender_Number
  and tracking_type = '3'
  and tracking_period = trackingperiod
  and payee_code = RLT_Update.payee_code;
EXCEPTION
  WHEN NO_DATA_FOUND THEN
    workmethod := '';
 
    update request_list_tracking
    set parcel_count = parcelcount, work_method = workmethod
    where lender_number = RLT_Update.Lender_Number
    and tracking_type = '3'
    and tracking_period = RLT_Update.Tracking_Period
    and payee_code = RLT_Update.payee_code;
end;

                                              
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by: ksummersPosted on 2008-09-26 at 07:15:00ID: 22579688

This is the solution that worked, but I am not sure why the begin and end statements make a difference when setting the variable.  Thank you both for your help!

begin
  trackingperiod :=  substr(tracking_period,1,4) || ( substr(tracking_period,-4) -1 );
  begin
    SELECT work_method INTO workmethod
    from request_list_tracking
    where lender_number = RLT_Update.Lender_Number
    and tracking_type = '3'
    and tracking_period = trackingperiod
    and payee_code = RLT_Update.payee_code;
  EXCEPTION
    WHEN NO_DATA_FOUND THEN
      workmethod := '';
  end;
 
  update request_list_tracking
  set parcel_count = parcelcount, work_method = workmethod
  where lender_number = RLT_Update.Lender_Number
  and tracking_type = '3'
  and tracking_period = RLT_Update.Tracking_Period
  and payee_code = RLT_Update.payee_code;
end;

 

by: ishandoPosted on 2008-09-28 at 16:52:12ID: 22593065

The internal begin and end identify the select statement as a block of code, and the exception is associated to this block, and only sets the variable to null.
Without begin and end, as in the second example I posted, the exception relates to the whole piece of code, and the update is now part of the exception handling code so is only executed if there is an exception raised.

20120131-EE-VQP-002

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