NULL and Space value in ABAP

Hi All,
I like to know, is it NULL and Space value is same in ABAP, if it is not how to check null value.
Thank you.
Senthil

everything is correct though some answers are not correct.
A Database NULL value represents a field that has never been stored to database - this saving space, potentially.
Usually all SAP tables are stored with all fields, empty fields are stored with their initial value.
But: If a new table append is created and the newly-added fields do not have the 'initial value' marked in table definition, Oracle will just set NULL values for them.
as mentioned: There is no NULL value to be stored in an ABAP field. The IS NULL comparison is valid only for WHERE clause in SELECT statement. WHERE field = space is different from WHERE field IS NULL. That's why you should check for both specially for appended table fields.
If a record is selected (fulfilling another WHERE condition) into an internal table or work area, NULL values are convertted to their initial values anyway.
Hope that sheds some light on the subject!
regards,
Clemens

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No distinction between NULL and space

No distinction between NULL and space. When you see the resultset, in PL/SQL developer, you will see that the NULL value is in yellow colour while column data having spaces is in white colour. In the new tool, there is not distinction between the two, so each time we will have to use the NVL function to determine the value in the column, which I would not like to do.

An option in Preferences could be created, so that it was possible to choose as values NULL would be shown, as already it occurs in other tools.

Avoiding null and duplicate values using model clause

Hi,
I am trying to use model clause to get comma seperated list of data : following is the scenario:
testuser>select * from test1;
ID VALUE
1 Value1
2 Value2
3 Value3
4 Value4
5 Value4
6
7 value5
8
8 rows selected.
the query I have is:
testuser>with src as (
2 select distinct id,value
3 from test1
4 ),
5 t as (
6 select distinct substr(value,2) value
7 from src
8 model
9 ignore nav
10 dimension by (id)
11 measures (cast(value as varchar2(100)) value)
12 rules
13 (
14 value[any] order by id =
15 value[cv()-1] || ',' || value[cv()]
16 )
17 )
18 select max(value) oneline
19 from t;
ONELINE
Value1,Value2,Value3,Value4,Value4,,value5,
what I find is that this query has duplicate value and null (',,') coming in as data has null and duplicate value. Is there a way i can avoid the null and the duplicate values in the query output?
thanks,
Edited by: orausern on Feb 19, 2010 5:05 AM

Hi,
Try this code.
with
t as ( select substr(value,2)value,ind
        from test1
        model
        ignore nav
        dimension by (id)
        measures (cast(value as varchar2(100)) value, 0 ind)
        rules
        ( ind[any]= instr(value[cv()-1],value[cv()]),
        value[any] order by id = value[cv()-1] || CASE WHEN value[cv()] IS NOT NULL
                                           and ind[cv()]=0     THEN ',' || value[cv()] END
select max(value) oneline
from t;
SQL> select * from test1;
        ID VALUE
         1 Value1
         2 Value2
         3 Value3
         4 Value4
         5 Value4
         6
         7 value5
         8
8 ligne(s) sélectionnée(s).
SQL> with
2   t as ( select substr(value,2)value,ind
3          from test1
4          model
5          ignore nav
6          dimension by (id)
7          measures (cast(value as varchar2(100)) value, 0 ind)
8          rules
9          ( ind[any]= instr(value[cv()-1],value[cv()]),
10          value[any] order by id = value[cv()-1] || CASE WHEN value[cv()] IS NOT NULL
11                                             and ind[cv()]=0     THEN ',' || value[cv()] END
12          )
13        )
14   select max(value) oneline
15   from t;
ONELINE
Value1,Value2,Value3,Value4,value5
SQL>

NULL and SPACE

Hello Gurus:
I have had to use BOTH 'null' and 'space' (ofcourse I tried 'initial' too...) when selecting data from PRPS table, otherwise all the required records were not fetched. I had to do this on two different occassions. The first is a SAP provided field and the other is customer's enhancement. I have cut-paste the two code blocks. Any ideas why?
Thanks in advance,
Sard.
***********(1)**************
select posid objnr func_area zzfunct from prps into
                corresponding fields of table it_wbs
                          where func_area is null or
                                func_area eq space.
************(2)**************
select prps-pspnr prps-posid prps-post1
   into (wa_test1-pspnr, wa_test1-posid, wa_test1-post1,
   from prps
where prps-posid in s_wbs and
        ...                 and
       ( prps-zzmlind is null or prps-zzmlind eq space ).
append wa_test1 to it_test1.
clear wa_test1.
endselect.

Hello Richard,
the Requirement to check for NULL corresponds to the definition of the database (field) within the DDIC. Check the flag initialize (it has also some documentation).
This flag is intended to be used if the definition of the db table is changed at SAP while the table already is used at customer side.
After deploying the corresponding patch or upgrade such a changed definition may result into the need to convert all entries. For tables with many entries this would result into inacceptable downtime. So such changes are done without the initialiazation/conversion of existing entries.
The tradeoff is the syntax you noticed.
Kind regards
Klaus

From two given tables, how do you fetch the values from two columns using values from one column(get values from col.A if col.A is not null and get values from col.B if col.A is null)?

From two given tables, how do you fetch the values from two columns using values from one column(get values from col.A if col.A is not null and get values from col.B if col.A is null)?

Hi,
Use NVL or COALESCE:
NVL (col_a, col_b)
Returns col_a if col_a is not NULL; otherwise, it returns col_b.
Col_a and col_b must have similar (if not identical) datatypes; for example, if col_a is a DATE, then col_b can be another DATE or it can be a TIMESTAMP, but it can't be a VARCHAR2.
For more about NVL and COALESCE, see the SQL Language manual: http://docs.oracle.com/cd/E11882_01/server.112/e26088/functions119.htm#sthref1310
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables involved, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
See the forum FAQ: https://forums.oracle.com/message/9362002

Union two tables with diffrent count of fields with null and float value

Hello,
i want to union two tables, first one with 3 fields and second one with 4 fields (diffrent count of fields).
I can add null value at end of first select but it does not work with float values in second table. Value form second table is convert to integer.
For example:
select null v1 from sessions
union
select 0.05 v1 from sessions
result is set of null and 0 value.
As workaround i can type:
select null+0.0 v1 from sessions
union
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or simple change select's order.
Is any better/proper way to do this? Can I somehow set float field type in first select?
Best regards,
Lukasz.
WIN XP, MAXDB 7.6.03

Hi Lukasz,
in a UNION statement the first statement defines the structure (number, names and types of fields) of the resultset.
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Is null and regular value in where ($variable)

is there any polibility to create select depend on value in where ?
select count(x) where y = $variablebut if variable is NULLit doesn't work cause must be IS NULL or IS NOT
select count(x) where y is $variableIs there any posibility to make it working with null and regular variable?

try:
select count(x) from <yourtable> where nvl(y,<not_possible_value>) = nvl($variable,<not_possible_value>);where <not_possible_value> is a value that is not possible for column y.
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Hi All,
Is there a parameter which allows me to translate automatically the instruction
select * from table_a where col_a = ''
in
select * from table_a where col_a is null
Thanks

Not in Oracle, no. col_a = NULL and col_a IS NULL are logically distinct clauses. If you are dealing with NULL's, you absolutely must use three-valued logic in your statements.
Depending on what you are doing, you may be able to throw an NVL on col_a to ensure a non-NULL value is returned.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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Hi,
In my reports having number of rows and three columns.The first columns value will be different for each and every row and it will be hard corded to the text box. My question is how to hide the particular row second and third column suppose
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HariKan

Hi Qiuyun Yn,
Thanks for your reply.
If i use Not Null in my query in where
condition then i have to add 30 fields in my where condition, and i guess it will not give proper output why because i have 30 columns.
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Regards,
Hari
HariKan

Webi displays null and wrong values after BW upgraded to SP6

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Thank you,
Regards,
Satya

Hi Ingo,
We are also facing the same issue that satya is facing.
We have developed the reports in BO XI 3.1 SP2 FP2.1 and SAP BW 7.01 EHP1 which was running correctly and showing the right result.
But we upgraded the BW system to SAP BW 7.01 SP6 and check the WebI reports which was showing the unexpected results. ( instead of n rows it shows only 1 row for any query without dimension values)
So we upgraded the BO sys to BO XI 3.1 SP2 FP 2.6 and checked the result but no luck with that also.
The workaround i found is i must need to add the Node objects from the universe in the Query which are also used in the query filter of Web Intelligence. But this is not reliable as we need to change all the developed queries.
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How to use 'is null' in select statement of ABAP program

hi,
I want to use 'is nul' or 'not null' in select statement of my ABAP program for any field. I have written below query but I am getting sy-subrc = 4 and getting no data.
SELECT * FROM mara INTO TABLE it_mara
WHERE volum IS NULL .
Can anyone resolve this.

Hi PKB,
Check the below thread for NULL and Space value in ABAP . It will help you
NULL and Space value in ABAP
Regards,
Pawan

Replacing NULL and EmptyString('') with "Unknown" in SSRS parameter dropdown

All,
What I want to do is, in the SSRS parameter drop down, instead of showing NULL and Blank values(), i want to categorize them as "Unknown", so, if the user selects "Unknown" from the SSRS drop down parameter, he should be able to see all
the records that have NULL values or empty strings in that particular column in the result set.
Can you tell me, how should I handle it in my main stored proc as well as in the dataset?
Right now, i have something like this:
Where
(t1.name in (select value from dbo.Split(@TName,',')) OR @TName IN ('All'))
-- Where t1.Name has empty strings and NULL values. Both of these values should be categorized under "Unknown"
-- How would the dataset query look like? Right now I have this query for populating the drop down for that parameter:
Select All
UNION
Select Distinct Name
Order BY 1

Hello,
Please refer to the following stored procedure:
SELECT
CASE WHEN TName IS NULL OR TName = ''
THEN 'Unknown' ELSE TName END AS TName
From DemoTable
Then, use following query code to get the parameter values:
SELECT Distinct
CASE WHEN TName IS NULL OR TName = '' THEN 'Unknown'
ELSE TName END AS TName
FROM DemoTable
Regards,
Alisa Tang
Alisa Tang
TechNet Community Support

How to include NULL in multi value parameters

Good Morning,
I'm posting this question after i tried other links and was not successful. I'm using a report builder to create a report. SSRS2008R2.
I have a sql to get the data into the data set. Source is ORACLE DB. The query is pulling lastname,firstname,dob,joindt,divname. I created a parameter in the SQL :
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I created another dataset (select distinct divname from table2) and selected the paramter properties to get the values from the second dataset and selected it to be multivalued. However the user wants to see the NULL's or BLANKS that are in the DIVNAME.
Can some one please tell me as how i can acheive this?
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Hi thinkingeye,
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Reference:
Null and Multi-value parameter possible
Include Null Value Multi-Value Parameter list
If you have any question, please feel free to ask.
Best Regards,
Simon Hou

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Hi all,
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I would like neutralize the 0UNIT value and 0QUANTITY value only when 0VTYPE = 1 or 2 :
<b>in other words, if 0vtype = 1 or 4 then 0unit = space and 0quantity = 0
b]
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Message was edited by:
Pontoise Pontoise
Message was edited by:
Pontoise Pontoise

Hi,
I amnt able to understand your requirement. But the code for which you asked is simple.
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0unit = space.
0quantity = 0.
endif.
Regards
Aneesh.

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does not store data for the null column. Also, for trailing null columns, Oracle does
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NULL and Space value in ABAP

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