Shared variable change its value with delay

Hello. My shared variable shows an old value during some time after writing a new one. What is the reason?

CKap,
how to check buffering enabling for shared variables? I've attached pics of block diagrams: VirtualSpectrometer writes shared variable dLambda, and Camera reads it. And sometimes, even when VirtualSpectrometer attemp to write 0 to dLambda for the number of loop's periods, dLambda stay non-zero (to be exact +/-5.55) for a couple of seconds.
Attachments:
VirtualSpectrometerd.jpg ‏135 KB
Camerad.jpg ‏386 KB

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> > To read such a huge text in the above suggested notes may become tiresome of not ofcourse worthless.
> What is the use of posting a list of links or randon OSS note hits, when you are not sure whether they are usefull or not?
>
hmm.... though I am not sure and agree with the raise of OSS message for this issue, but when I read these notes after reading the query I found them to be notified to op.
> Lodewijk can do that simple search himself. I always assume that the person asking a question has done a search before hand...
>
Agreed again. But not sure of his search result. May be his string missed some of these notes and can help him to check the program errors rectified in couple of Notes in 2009. But of course I confess about the uncertainty of the exact solution from my side.
> If it is a basic requestion and easy answer with a link, then I delete it. It has no value to SDN. You are just attempting to do someone else's work for them, and that it not the case here.
>
> Please read the question carefully and answer specifically.
>
read and then posted the message. Also as I was not sure of solution to this particular error I surrendered in advance [mainly for you ]. Still I would like op to view the following notes on SAP Default value maintenance and if he has already done then that is great and I am just not helping with proper suggestion.
[Note 1287998 - Problems when you maintain default authorization values|https://websmp230.sap-ag.de/sap%28bD1lbiZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=1287998]
[Note 1378328 - SU24: Error after deleting authorization default values|https://websmp230.sap-ag.de/sap%28bD1lbiZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=1378328]
Note 1382895 - SU24|Default value maintenance for authorization objects
Note 1235912 - SU24|Display and maintenance of authorization default values|
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Variable losing its value

Hi there,
I have written an explicit cursor (procedure given below) and the issue I have is, when the cursor runs the sql statement
(CURSOR csr_address is
SELECT rtrn_id,
entp_abn,prog_program_cd,
sched_nbr,schd_version_yr,
litm_line_item_nbr, revise_val_text
FROM RETURN_LINE_ITEMS
WHERE sched_nbr = '000'
AND prog_program_cd = '01' AND litm_line_item_nbr in ('016','023')
AND rtrn_id = v1_rtrn_id;)
against a particular return id, it fetches 2 rows; one for line item 016 and the other one for line item 023 where in the litm_line_item_nbr for 016 is 016 and for litm_line_item_nbr for 023 is 023.
Once that's done, (I have used a For loop cursor), it loops through as follows:
FOR country_rec in csr_address LOOP
v_line_item_16 := country_rec.litm_line_item_nbr;
if v_line_item_16 = '016' then
v_line_item_16 :='016'
end if;
v_line_item_23 := country_rec.litm_line_item_nbr;
if v_line_item_23 = '023' then
v_line_item_23 :='023'
end if;
-- v_temp_line_item_23:=v_line_item_23;
v_revise_val_text_16 := country_rec.revise_val_text;
v_revise_val_text_23 := country_rec.revise_val_text;
END LOOP;
When it loops for the 1st time, it does bring the value that I am looking for . Currently the value for "v_line_item_16 := country_rec.litm_line_item_nbr" is "016" and v_line_item_23 := country_rec.litm_line_item_nbr is "null". That's fine. Again it loops through for the 2nd time and then the value for v_line_item_16 := country_rec.litm_line_item_nbr becomes 023 (which is wrong and I wanted it to be blank) and then value for variable v_line_item_23 := country_rec.litm_line_item_nbr becomes 023.
Due to the above mismatch of values, I am not able to retain the original value of v_line_item_16 which should be 016 and it turns itself into 023. Is there any way around it?
Please help.
My complete code is below for easier understanding:
CREATE OR REPLACE procedure test_sandeep is
v1_bin number:=402511083;
v1_rtrn_id number:=2163180;
v_line_item_16 RETURN_LINE_ITEMS.LITM_LINE_ITEM_NBR%TYPE;
v_line_item_23 RETURN_LINE_ITEMS.LITM_LINE_ITEM_NBR%TYPE;
v_revise_val_text_16 RETURN_LINE_ITEMS.REVISE_VAL_TEXT%TYPE;
v_revise_val_text_23 RETURN_LINE_ITEMS.REVISE_VAL_TEXT%TYPE;
V_COUNTRY_CODE cg_ref_codes.rv_low_value%type;
p_ENTPBIN EDF_NOA_RETURNS.ENTP_ABN%TYPE;
-- v_temp_line_item_16 varchar2(3);
-- v_temp_line_item_23 varchar2(3);
-- v1_bin:=402511083;
-- v1_rtrn_id:=2163180;
CURSOR csr_address is
SELECT rtrn_id,
entp_abn,prog_program_cd,
sched_nbr,schd_version_yr,
litm_line_item_nbr, revise_val_text
FROM RETURN_LINE_ITEMS
WHERE sched_nbr = '000'
AND prog_program_cd = '01' AND litm_line_item_nbr in ('016','023')
AND rtrn_id = v1_rtrn_id;
Begin
-- select count
FOR country_rec in csr_address LOOP
v_line_item_16 := country_rec.litm_line_item_nbr;
if v_line_item_16 = '016' then
v_line_item_16 :='016';
end if;
v_line_item_23 := country_rec.litm_line_item_nbr;
if v_line_item_23 = '023' then
v_line_item_23 :='023';
end if;
-- v_temp_line_item_23:=v_line_item_23;
v_revise_val_text_16 := country_rec.revise_val_text;
v_revise_val_text_23 := country_rec.revise_val_text;
END LOOP;
If (v_line_item_16 = '016' and v_revise_val_text_16 is not null) and (v_line_item_23 = '023' and v_revise_val_text_23 is null) then
v_revise_val_text_16:=v_revise_val_text_16;
if v_revise_val_text_16 = 'CA' then
-- get the country Code
SELECT RV_LOW_VALUE INTO V_COUNTRY_CODE from cg_ref_codes
where rv_low_value = (select revise_val_text from return_line_items where rtrn_id = v1_rtrn_id
and revise_val_text ='CA')
and rv_domain = 'CODE COUNTRY';
end if;
-- Condition 2 :
elsif (v_line_item_16 = '016' and v_revise_val_text_16 is not null) and (v_line_item_23 = '023' and v_revise_val_text_23 is not null) then
v_revise_val_text_23 := v_revise_val_text_23;
if v_revise_val_text_23 = 'CA' then
-- get the country code
SELECT RV_LOW_VALUE INTO V_COUNTRY_CODE from cg_ref_codes
where rv_low_value = (select revise_val_text from return_line_items where rtrn_id = v1_rtrn_id
and revise_val_text ='CA')
and rv_domain = 'CODE COUNTRY';
end if;
-- Condition 3 :
elsif (v_line_item_16 = '016' and v_revise_val_text_16 is not null) and (v_line_item_23 ='023' and v_revise_val_text_23 is null) then
v_revise_val_text_16 := v_revise_val_text_16;
if v_revise_val_text_16 <> 'CA' then
-- get the country code
SELECT RV_LOW_VALUE INTO V_COUNTRY_CODE from cg_ref_codes
where rv_low_value = (select revise_val_text from return_line_items where rtrn_id = v1_rtrn_id
and revise_val_text = v_revise_val_text_16)
and rv_domain = 'CODE COUNTRY';
end if;
-- Condition 4 :
elsif (v_line_item_16 = '016' and v_revise_val_text_16 is not null) and (v_line_item_23 = '023' and v_revise_val_text_23 is not null) then
v_revise_val_text_23 := v_revise_val_text_23;
if (v_revise_val_text_16 = 'CA' and v_revise_val_text_23 <> 'CA') then
-- get the country code
SELECT RV_LOW_VALUE INTO V_COUNTRY_CODE from cg_ref_codes
where rv_low_value = (select revise_val_text from return_line_items where rtrn_id = v1_rtrn_id
and revise_val_text = v_revise_val_text_23)
and rv_domain = 'CODE COUNTRY';
end if;
-- Condition 5 :
elsif (v_line_item_16 = '016' and v_revise_val_text_16 is not null) and (v_line_item_23 = '023' and v_revise_val_text_23 is not null) then
v_revise_val_text_23 := v_revise_val_text_23;
if (v_revise_val_text_16 <> 'CA' and v_revise_val_text_23 <> 'CA') then
-- get the country code
SELECT RV_LOW_VALUE INTO V_COUNTRY_CODE from cg_ref_codes
where rv_low_value = (select revise_val_text from return_line_items where rtrn_id = v1_rtrn_id
and revise_val_text = v_revise_val_text_23)
and rv_domain = 'CODE COUNTRY';
end if;
end if;
End;
Edited by: user11934091 on Jul 21, 2010 9:43 AM

Because you are doing it all wrong in your loop. I assume '016' and '023' to be constants.
A better way would be to pivot your rows into columns. I am not sure what version you are using, but if is before 11g, then let's do it the old way.
Your cursor should be:
CURSOR csr_address is
WITH sub_tmp AS (
SELECT rtrn_id,
entp_abn,prog_program_cd,
sched_nbr,schd_version_yr,
litm_line_item_nbr, revise_val_text
FROM RETURN_LINE_ITEMS
WHERE sched_nbr = '000'
AND prog_program_cd = '01' AND litm_line_item_nbr in ('016','023')
AND rtrn_id = v1_rtrn_id),
qry_pivot AS (
SELECT
MAX((CASE
WHEN litm_line_item_nbr = '016' THEN litm_line_item_nbr
ESLE NULL
END)) AS line_item_16,
MAX((CASE
WHEN litm_line_item_nbr = '023' THEN litm_line_item_nbr
ESLE NULL
END)) AS line_item_23,
SELECT line_item_16, line_item_23
FROM qry_pivot;
Then from the cursor, no need to loop. You can FETCH columns line_item_16, line_item_23
Edited by: dongzky on Jul 22, 2010 7:04 PM (forgot to add MAX function

How to insert data into a table only when data has changed its value (when compared to the previous inserted value)

I wish to insert data into a table only when the value of the inserted data has changed. Thus, in a time series, if the value of the data at time, t-1, is 206 then if the data to be inserted at time t is 206, then it is skipped (not entered).
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Shared variable change its value with delay

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