OCI, Nulls and bind mismatch

I am having some issues with a third party application that used OCI to access the database, we have a problem statement that generates hundreds of child cursors for a specific statement. Investigating v$sql_shared_cursor show the reason for this a bind mismatches, on tracing the binds this seems to happen where nulls are bound into the number fields (the statement updates 43 values in one row of a table). This is really killing the database performance, is anyone aware of an issue with binding nulls in OCI similar to this http://www.usn-it.de/index.php/2010/08/04/oracle112-mutex-s-too-many-child-cursors/ seen in the jdbc drivers.
As its a third party application I can;t get hold of the code and the vendors support have identified it as a slow database issues rather than actually look at the code to figure out whats going on the versions of oracle involved are
Database: 11.2.0.2 + patchset update 2 + one off patches 12431716,12423122,11664046
Client version: OCI (whichever comes with instant client 11.2.0.1)
Chris

Hi Chris,
Inside API calls in the application is different for null and not-null. Refer to my post : OCIBindByPos() 8th parameter and its impact on performance for more.
However, there is no indication in OCI documentation or any other doc about the behavior of child cursors with null concept although the null support is available from Oracle 8.
We are running some tests and will update the forum from findings.

Similar Messages

Dynamic sql and bind variables

Hi,
I have a stored procedure which filters a table on 5 five columns. The filters come from the input parameters,
and these 5 parameters can come in any combination, I mean some of them may be null and some of them may not be null.
So I constructed the where filter of the query with IF blocks like the following:
dynamic_query := 'select * from TESTTABLE where 1= 1';
IF (P1 is not null) THEN
dynamic_query := dynamic_query || ' AND column1 = :1';
END IF;
IF (P2 is not null) THEN
dynamic_query := dynamic_query || ' AND column2 = :2';
END IF;
IF (P3 is not null) THEN
dynamic_query := dynamic_query || ' AND column3 = :3';
END IF;
IF (P4 is not null) THEN
dynamic_query := dynamic_query || ' AND column4 = :4';
END IF;
IF (P5 is not null) THEN
dynamic_query := dynamic_query || ' AND column5 = :5';
END IF;
OPEN CUR_OUT FOR dynamic_query USING P1, P2, P3, P4, P5;
The problem is how can I construct the USING and bind parameters, I cannot use "USING P1, P2, P3, P4, P5" because some of bind variables
may not be in dynamic query if the input parameters are null. Is there a way to overcome this problem without writing all the 2 ^ 5 combinations?
Any help is greatly appreciated.

here it is in the Tomer Cohen way:
IF (P1 is not null) THEN
dynamic_query := dynamic_query || ' AND column1 = :1';
ELSE
dynamic_query := dynamic_query || ' AND :1 IS NULL';
END IF;
IF (P2 is not null) THEN
dynamic_query := dynamic_query || ' AND column2 = :2';
ELSE
dynamic_query := dynamic_query || ' AND :2 IS NULL';
END IF;
IF (P3 is not null) THEN
dynamic_query := dynamic_query || ' AND column3 = :3';
ELSE
dynamic_query := dynamic_query || ' AND :3 IS NULL';
END IF;
IF (P4 is not null) THEN
dynamic_query := dynamic_query || ' AND column4 = :4';
ELSE
dynamic_query := dynamic_query || ' AND :4 IS NULL';
END IF;
IF (P5 is not null) THEN
dynamic_query := dynamic_query || ' AND column5 = :5';
ELSE
dynamic_query := dynamic_query || ' AND -1 = :5';
END IF;
OPEN CUR_OUT FOR dynamic_query USING P1, P2, P3, P4, P5;Amiel Davis

My outputtext component is NULL and giving nullpointer exception

I am using jDeveloper 11.1.1.3g.
I am having a strange problem. I have a jsp in which i have few outputtext components and a submit button.
When i click on submit button i am calling a method in my backing bean.
In this method, i am trying to populate the outputtext component with some value, but i am getting null Pointer exception.
i am refering to my outputtext component in my backing bean calculate() method like below....
private RichOutputText otEdPgEmpCode;
public void calculate(){
this.otEdPgEmpCode.setValue("emp0001"); - - - I AM GETTING NULL POINTER EXCEPTION HERE.
public void setOtEdPgEmpCode(RichOutputText ot1) {
this.otEdPgEmpCode = ot1;
public RichOutputText getOtEdPgEmpCode() {
return otEdPgEmpCode;
I FOUND THAT otEdPgEmpCode IS ACTUALLY NULL , AND HENCE THIS EXCEPTION IS COMMING.
PLS HELP ME ON THIS.
Zee
Edited by: 804703 on Dec 22, 2010 11:31 PM

I found the problem and it was in teh jsp code.
There was no "backingBeanScope" mentioned in the jsp binding attribute. When i provided my component with it, then it worked properly.
Thanks a lot for taking your time to help me on this.
Zee

Getting an error while fetching the data and bind it in the Tree table

Hi All,
I am getting an error "A navigation paths parameter object has to be defined - " while fetching the data and bind it in the Tree table.
Please find the code and screenshot below
var oModel = new sap.ui.model.odata.ODataModel("../../../XXXX.xsodata/", true);
var oTable = sap.ui.getCore().byId("table");
oTable.setModel(oModel);
oTable.bindRows({
    path: "/Parent",
    parameters: {expand: "Children"}
Can anyone please give me a suggestion to rectify this?
Thanks in Advance,
Aravindh

Hi All,
Please see the below code. It works fine for me.
var oController = sap.ui.controller("member_assignment");
var oModel = new sap.ui.model.odata.ODataModel("../../../services/XXXX.xsodata/", true);
var Context = "/PARENT?$expand=ASSIGNEDCHILD&$select=NAME,ID,ASSIGNEDCHILD/NAME,ASSIGNEDCHILD/ID,ASSIGNEDCHILD/PARENT_ID";
var oTable = sap.ui.getCore().byId("tblProviders");
oModel.read(Context, null, null, true, onSuccess, onError);
function onSuccess(oEventdata){
    var outputJson = {};
    var p = 0;
    var r = {};
    try {
        if (oEventdata.results){
            r = oEventdata.results;
    } catch(e){
        //alert('oEventdata.results failed');
    $.each(r, function(i, j) {
        outputJson[p] = {};
        outputJson[p]["NAME"] = j.NAME;
        outputJson[p]["ID"] = j.ID;
        outputJson[p]["PARENT_ID"] = j.ID;
        outputJson[p]["DELETE"] = 0;
        var m = 0;
        if (j.ASSIGNEDCHILD.results.length > 0) {
            $.each(j.ASSIGNEDCHILD.results, function(a,b) {
            outputJson[p][m] = { NAME: b.NAME,
                                 ID : b.ID,
                                 PARENT_ID: b.PARENT_ID,
                                 DELETE: 1};
            m++;
        p++;
    var oPM = new sap.ui.model.json.JSONModel();
    oPM.setData(outputJson);
    oTable.setModel(oPM);
function onError(oEvent){
    console.log("Error on Provider Members");
oTable.bindRows({
    path:"/"
Regards
Aravindh

Convert row to columns and bind with same ID

Hi All,
I have a table with 2 columns - ID as Int and ClientID as Varchar(max)
ID        ClientID
1         123,784
2         342,891,322
3         111
4         982,543,212,453
I want t-sql to get output like this..Whenever there is a comma, split them and bind it to same ID.
ID        ClientID
1         123
1         784
2         342
2         891
2         322
3         111
4         982
4         543
4         212
4         453
Create statement:
Create Table Sample
( ID Int null , ClientID varchar(max) null)
Insert statement:
Insert into sample (ID,ClientID) Values (1,'123,784')
Insert into sample (ID,ClientID) Values (2,'342,891,322')
Insert into sample (ID,ClientID) Values (3,'111')
Insert into sample (ID,ClientID) Values (4,'982,543,212,453')
Thanks,
RH
sql

You can also do this using a user defined table valued function like this:
create FUNCTION [dbo].[ufn_SplitString_Separator](@InputStr VARCHAR(max), @Separator VARCHAR(1))
RETURNS @tmpTable TABLE (OutputStr VARCHAR(max))
AS BEGIN
DECLARE @TmpPOS integer
SET @TmpPOS = CHARINDEX(@Separator,@InputStr)
WHILE @TmpPos > 0 BEGIN
IF @TmpPos > 0 BEGIN
INSERT INTO @tmpTable VALUES (LTRIM(RTRIM(SUBSTRING(@InputStr,1,@TmpPos-1))))
SET @InputStr = SUBSTRING(@InputStr, @TmpPOS + 1, LEN(@InputStr) - @TmpPos)
SET @TmpPOS = CHARINDEX(@Separator,@InputStr)
END ELSE BEGIN
INSERT INTO @tmpTable VALUES (LTRIM(RTRIM(@InputStr)))
SET @TmpPos = 0
END
END
IF LEN(@InputStr) > 0 BEGIN
INSERT INTO @tmpTable VALUES (LTRIM(RTRIM(@InputStr)))
END
RETURN
END
And get the results:
DECLARE @Sample TABLE ( ID Int null , ClientID varchar(max) null)
Insert into @sample (ID,ClientID)
VALUES
(1,'123,784'),(2,'342,891,322'),(3,'111'),(4,'982,543,212,453')
select id, outputstr as clientid from @sample cross apply dbo.[ufn_SplitString_Separator](clientid,',')
"If there's nothing wrong with me, maybe there's something wrong with the universe!"

Dynamic creation of ItemListBox and binding a child node

Hello @all,
I have the following context structure
root
--category
-- --report
-- -- --id
-- -- --name
-- --id
-- --name
the parent node is "category" with attributes "id" and "name" and the child node is "report" with "id" and "name".
Now I want on an onAction-Event of a Button, that for every category an itemListBox will be created with the according report names. the creation of the itemList is not the problem, but the binding of the datasource and/or the descriptivetext.
my code:
public void initItemListBox( )
    //@@begin initItemListBox()
    IWDView view = wdContext.currentContextElement().getSelectView();
    IWDGroup group = (IWDGroup) view.getElement("ItemListGroup");
    if (group.hasChildren())
      group.removeAllChildren();
    for (int i = 0; i < wdContext.nodeCategory().size(); i++)
      ICategoryElement catEl = wdContext.nodeCategory().getCategoryElementAt(i);
      wdContext.nodeCategory().setLeadSelection(i);
      generateItemLists(wdContext.currentContextElement().getSelectView(), wdContext, catEl);
    //@@end
public void generateItemLists( com.sap.tc.webdynpro.progmodel.api.IWDView view, de.mgi.portaldev.bc.mdw.msi.wdp.IPrivateCRSReportView.IContextNode wdContext, de.mgi.portaldev.bc.mdw.msi.wdp.IPrivateCRSReportView.ICategoryElement category )
    //@@begin generateItemLists()
    //    ItemListBox
    IWDGroup group;
    IWDGroup catGroup;
    IWDLabel label;
    String groupId = "group_" + category.getName();
    catGroup = (IWDGroup) view.createElement(IWDGroup.class, groupId);
    IWDMatrixLayout matrLayout = (IWDMatrixLayout) catGroup.createLayout(IWDMatrixLayout.class);
    String labelId = "label_" + category.getName();
    label = (IWDLabel) view.createElement(IWDLabel.class, labelId);
    label.setText(category.getName());
    IWDMatrixData layout = (IWDMatrixData) label.createLayoutData(IWDMatrixData.class);
    layout.setVAlign(WDCellVAlign.TOP);
    String itemListId = "itemList_" + category.getName();
    IWDItemListBox itemListBox = (IWDItemListBox) view.createElement(IWDItemListBox.class, itemListId);
    label.setLabelFor(itemListId);
    IWDMatrixData itemlayout = (IWDMatrixData) itemListBox.createLayoutData(IWDMatrixData.class);
    itemListBox.bindDescriptiveText("crsReporting.category.report.name");
    IWDNodeInfo reportNodeInfo = category.nodeReport().getNodeInfo();
//    itemListBox.bindText(reportNodeInfo.getAttribute("name"));
    itemListBox.setVisibleItems(5);
    IWDMatrixHeadData matrixHead = (IWDMatrixHeadData) itemListBox.createLayoutData(IWDMatrixHeadData.class);
    IWDAction itemListAct = (IWDAction) wdThis.wdGetItemSelectAction();
    itemListBox.setOnLeadSelect(itemListAct);
//    itemListBox.bindDataSource(reportNodeInfo);
    itemListBox.bindDataSource("crsReporting.category.report");
    catGroup.addChild(label);
    catGroup.addChild(itemListBox);
    group = (IWDGroup) view.getElement("ItemListGroup");
    group.addChild(catGroup);
    //    END ITEMLIST
    //@@end
What am I doing wrong? in every ItemListbox there are only the report names of the last category.
thanks.

RowRepeater is available in WD Java since NW CE (7.1). With RowRepeater, the solution is trivial and can be done completely by declaration in view designer.
In earlier releases, you can solve it as follows (non-trivial)
- For each category, create a separate context node "Category_i" with an attribute "name"
- Inside each category node, create a non-singleton node "Reports" with an attribute "name"
- Foreach report, add a node element to the reports subnode of its category node <b>element</b>
All this has to be done using the generic context API.
On each change of the data, reset the context and re-create these nodes.
In wdDoModifyView(), check if data have changes and create UI elements programmatically.
- For each category, create a group, bind header text to category name.
- Inside each group, create a ItemListBox, bind "dataSource" to reports sub-node of category (non-singleton!) and bind "text" to text attribute of report node.
Sample code:
To build context structure:
private void createCategories()
    for (int i = 0; i < 3; ++i)
      IWDNodeInfo categoryNodeInfo = wdContext.getNodeInfo().addChild("Category" + i, null, true, CMICardinality.ONE, CMICardinality.ONE, true, null);
      IWDAttributeInfo att = categoryNodeInfo.addAttribute("name", "ddic:com.sap.dictionary.string");
      IWDNode categoryNode = wdContext.getChildNode(categoryNodeInfo.getName(), 0);
      categoryNode.getElementAt(0).setAttributeValue(att.getName(), "Category #" + i);
      IWDNodeInfo reportNodeInfo = categoryNodeInfo.addChild("Reports", null, false, CMICardinality.MANY, CMICardinality.ZERO_TO_ONE, true, null);
      IWDAttributeInfo attReportName = reportNodeInfo.addAttribute("name", "ddic:com.sap.dictionary.string");
      IWDNode reportNode = categoryNode.getChildNode("Reports", 0);
      for (int j = 0; j < 5; ++j)
        IWDNodeElement report = reportNode.createAndAddElement();
        report.setAttributeValue("name", "Report #" + j);
To recreate UI:
if (<data_have_changed>)
      IWDTransparentContainer root = (IWDTransparentContainer) view.getRootElement();
      for (int i = 0; i < 3; ++i)
        IWDNode categoryNode = wdContext.getChildNode("Category" + i, 0);
        IWDAttributeInfo attName = categoryNode.getNodeInfo().getAttribute("name");
        IWDGroup group = view.createElement(IWDGroup.class);
        root.addChild(group);
        IWDCaption header = view.createElement(IWDCaption.class);
        group.setHeader(header);
        header.bindText(attName);
        IWDNode reportsNode = categoryNode.getChildNode("Reports", 0);
        IWDAttributeInfo attReportName = reportsNode.getNodeInfo().getAttribute("name");
        IWDItemListBox list = view.createElement(IWDItemListBox.class);
        group.addChild(list);
        list.bindDataSource(reportsNode.getNodeInfo());
        list.bindText(attReportName);
Armin
Fixed code tags

Security processor was unable to find a security header in the message. This might be because the message is an unsecured fault or because there is a binding mismatch between the communicating parties.

We have a web role where we have hosted a WCF service.
We are facing the below exception intermittently on consuming the service.
Security processor was unable to find a security header in the message. This might be because the message is an unsecured fault or because there is a binding mismatch between the communicating parties. This
can occur if the service is configured for security and the client is not using security.
This is intermittent. Few calls fail , and the subsequent calls succeed without making any changes.
Please help in overcoming this abnormal behavior.
Thanks in advance !!
Best Regards ,
Eswar

Hi Eswar,
As the error message mentioned, it may be a mismatch between the configuration on the client and the server.Try putting all your configuration in a binding configuration and then use the same binding configuration on the server and client. Since this issue
is more related with WCF, I suggest you move to WCF forum, it is appropriate and more experts will assist you.
Best Regards,
Jambor
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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Lexical and bind variables in RUN_PRODUCT

Hi all,
I have the following RUN_PRODUCT but it gives me "bad bind variable:
DECLARE
pl_id ParamList;
BEGIN
pl_id := Create_Parameter_List('tmpdata');
Add_Parameter(pl_id,'CATEGORY',TEXT_PARAMETER,(:CATEGORY));
Add_Parameter(pl_id, 'PARAMFORM', TEXT_PARAMETER, 'NO');
Add_Parameter(pl_id, 'DESTYPE', TEXT_PARAMETER, 'Screen');
Run_Product(REPORTS, 'C:\Pled', SYNCHRONOUS, RUNTIME, FILESYSTEM, pl_id, NULL);
Destroy_Parameter_List( pl_id );
END;
How can I define both lexical and bind variables in a RUN_PRODUCT. Please assist!

Hello Nicky,
The correct way to call Reports from Forms in 6i using the RUN_PRODUCT built-in using bind parameters would be something like the code given below. This example assumes that you have a form module parameter and a report parameter called 'category'.
declare
pl_id paramlist;
begin
pl_id := create_parameter_list('tmpdata');
add_parameter(pl_id, 'category', text_parameter, :parameter.category);
add_parameter(pl_id, 'paramform', text_parameter, 'no');
add_parameter(pl_id, 'destype', text_parameter, 'screen');
run_product(reports, 'c:\test_report.rdf', synchronous, runtime, filesystem, pl_id, null);
destroy_parameter_list( pl_id );
end;
Thanks,
The Oracle Reports Team.

Using NULL and NOT NULL in prompted filters

Dear all,
While trying to grap the concept of prompted filters in sap bo web intelligence, I had a question whether why we cannot use NULL and NOT NULL while creating a prompted filters in our report.

HI,
'Is Null' and 'Not Null' are the predefined functions in webi which only eliminate the null values or considering only null values.
'Is Null' and 'Not Null' are itself predefined functions that why you are not getting prompts.
Null values are standard across the databases so this is defined as a function in webi to specific eliminate the null values.
If something is not standard then there is option in the webi to use different operator with static values or with prompts.
More more information on Null see the Null wiki page.
Null (SQL) - Wikipedia, the free encyclopedia
Amit

Not null and enable or disable column in tabular form

Hi,
Using apex version 4.1 and working on tabular form.
ACT_COA_SEGMENT_MAS is Master table
and
ACT_SEGMENT_VALUES_MAS is detail table
I have entered 8 rows in master table and PARENT_SEGMENT_ID is column in master table which is null able. If i specified PARENT_SEGMENT_ID with value in master table then in detail table there is column PARENT_ID that should not be null and enable.
How i can enable or disable column when in master table PARENT_SEGMENT_ID column is null then in detail table PARENT_ID column should disable and vice versa.
I have created tabular form on Detail table. before insert into the tabular form Check in master table in first entry if PARENT_SEGMENT_ID is not null in first row of master table then in tabular form PARENT_ID should enable and not null able in corresponding to this first row id's lines in tabular form.
Same should check for second row in master table if PARENT_SEGMENT_ID is not null then entered rows with PARENT_ID into tabular form corresponding to 2nd id in master table should not nullable and column should enable in tabular form.
Thanks & Regards
Vedant
Edited by: Vedant on Jan 9, 2013 9:12 PM

Vedant,
You need to create you own manual tabular form and not use the wizard.
Using APEX_ITEM api you should be build you own form and you will be able to control how you wan to display the rows. (See Link [Apex Item Help|http://docs.oracle.com/cd/E37097_01/doc/doc.42/e35127/apex_item.htm#CACEEEJE] )
select case when PRIMARY_TABLE_COLUMN is null then APEX_ITEM.DISPLAY_AND_SAVE(3 , DETAIL_COLUMN ) else APEX_ITEM.TEXT(2,detail_column) end "ALIAS" from detail table
Hope that help.
Vivek

Connection ==null and Connection is closed, difference

Hi experts,
I wonder what are the differences between "Connection==null" and "Connection is closed"?
I closed a connection on one JSP page after a bean has retrieved data. Then, on the same page I call another bean to connect to the database. Because the Connection object has been created earlier, therefore Connection is not NULL, but it is closed. So, the second bean has to initiate another connection(if I knew how to test the "closed" status)
Is it true that if the Connection is closed, then it should become null?
I think I must have make quite a few mistakes in above statement:). Please help. Thanks a lot.

connection.isClosed() will tell you if the connection object is closed or not. If it is closed, then the connection object can be dropped because you will not be able to create any new statements from that connection object. Just recreate another connection to use when this occurs.

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.
E.g. if y always is a positive number you could use the value -1.

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>

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

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

OCI, Nulls and bind mismatch

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