problem of null values

Similar Questions

• Problem of null values for the Variable

  I work with APEX 4.0.  I have a menu page that has a list item widget types to select.  I then a navigation list that calls a report page and sets a widget-type element with the value of the widget on the page called - type element.

  Problem is that type widget on the page called article does not meet.  The report depends directly on this issue being filled.  The url indicates the element in the form of Pxxx_WIDGET_TYPE, but the value for parameter & Pxxx_WIDGET_TYPE. is set to null.  I am also an element of Pxxx_CALLED_FROM filling, which fill, and the url shows the value of & APP_PAGE_ID.

  What's wrong?  How to fill the element of widget_type?

  How do you define value for Pxxx_WIDGET_TYPE? And is there a value in the session state for this item?

  Kind regards

  Vincent

• Script to generate XML files... problem with null values

  Hello everyone,
  
  I come here with a question that troubled me for some time. I have a script which I run in SQLPLUS every now and then to generate an XML file.
  
  Problem is that the data that must be in XML format are not allways <>NULL and I need to hide empty tags < / tag >.
  
  I'll post my script below and if you could help me with it, it would be really great!
  
  Thanks for reading!
  

  set long 20000000
  set long 20000000
  set linesize 32000
  SET ECHO OFF
  SET TRIMSPOOL on
  SET HEADING OFF
  SET PAGESIZE 50000
  SET VERIFY OFF
  SET FEEDBACK OFF
  SET TERMOUT OFF
  spool C:\test.xml
  set serveroutput on
  begin
    dbms_output.put_line('<?xml version="1.0" encoding="utf-8" ?>');
  end;
  /
  SELECT
  XMLELEMENT("ReportRoot",XMLATTRIBUTES('http://www.w3.org/2001/XMLSchema-instance' as "xmlns:xsi", 'http://www.w3.org/2001/XMLSchema' as "xmlns:xsd" , '1.0' as "Version",sysdate as "CreationDate",to_char(sysdate,'hh:mm:ss') as "CreationTime",'1524544845' as "id"),
  XMLELEMENT("Porocila",XMLELEMENT("JOLY",(SELECT XMLAGG (XMLELEMENT("RefNrReport",replace('SON'||to_char(ref_ST,'00000'),' ',''))) from access_table_2 where ref_ST = &1),
  XMLELEMENT("ReportDate",sysdate),XMLELEMENT("Labeling",'545254450'),
   (SELECT XMLAGG     (XMLELEMENT("Reportf",
                                                                   XMLELEMENT("access",access),
                                                                   XMLELEMENT("date",date),
                                                                   XMLELEMENT("datep",datep),
                                                                   XMLELEMENT("ModificationInfo",'M'),XMLELEMENT("ModificationReason",modireason)))
                                               from v_xml_test where id_dok = &1 and ind_print = '1'))))
    .extract('/*')
    from dual
       /     
       spool off
  /
  exit

  Now lets pretend that

  XMLELEMENT("datep",datep),

  sometimes is NULL and I don't want to see it.

  Now lets pretend that

  XMLELEMENT("datep",datep),
  

  sometimes is NULL and I don't want to see it.

  XMLForest that does exactly:

  XMLForest(datep as "datep")
  

  (internally, it is equivalent to what Alex has suggested)

• Null values for DB2 are causing problems

  Hello
  I have another problem with the link to the database to DB2 on IBM iSeries Access for Linux 64-bit OEL5 with gateway database Oracle and unixODBC 2.2.14.
  DB link works. However, null values for DB2 are causing problems. "The columns Date null on db2 return a date ' 30.11.0002 ', and the columns of characters that are null return an error ORA-28528: heterogeneous Services data type conversion error.
  isql returns the correct results.
  
  How can I fix? May set some parameters for the conversion of the data on the entry door?
  
  Thank you.

  If the driver is not fully ODBC level 3 compliant and functions of the spleen, we are lost. But sometimes drivers ODBC level 3 compliant, but lack the correct implementation of 64-bit. In these cases, we can tell the gateway to use the 32-bit ODBC 3 standard adjustment level in the gateway init file:
  HS_FDS_SQLLEN_INTERPRETATION = 32

• JDev 11 g: problem view VO criteria ignore Null values

  Hello
  
  I don't know if it's a bug or do something wrong but here is my case:
  I created an original Version of a database table.
  In page view of all of VO, aaa I bind a variable named
  Then I add a criteria-> display I add an element of criteria including bing my previously create variable to an attribute of VO-> I have defined validation on "necessary".
  Then a race my request and made a few test/dev.
  
  After a while, I needed to change my display criteria 'optional' with 'Ignore Null values' checked.
  I changedit, run my application and the display criteria did not work... I don't add no rows returned when I went to my variable named "null".
  After 1 or 2 days to research, I managed to notice that in fact, an attribute is missing in my VO object source.
  
  I needed to add explicitly in the XML of the source of this attribute:
  GenerateIsNullClauseForBindVars = 'true '.
  
  in the desired so ViewCriteriaItem it ignores Null values.
  
  I tried various combinations of the interface for presentation but non of them generated this attribute set to "true".
  Only when I put the validation 'Optional' and ' ignore values null ' unchecked, GenerateIsNullClauseForBindVars = 'false' appears in the XML source code.
  
  Is this a bug?
  Here's my version JDev: Build JDEVADF_11.1.1.1.0_GENERIC_090615.0017.5407
  
  Jack

  To report a bug, you must go through the MOS (aka Metalink). You need a support contract valid to log into MOS.

  Timo

• NULL values for some elements of the XML reading tree

  I am confirming that I interpret correctly all the elements of a custom data XML structure defined by my application (the schema is completely under my control).  Some of the elements in my XML tree are read as NULL values, even if similar items are readind as expected.  I have checked some obvious things like misspelling the names of keys, but have not yet find the problem.  Anyone who has debugged similar questions - what else could cause this?

  Example XML:

  
      1.0.0.0
      1000
      MyAppsName
      
          
              1000
              userDefined
              StructName
          
      
  
  

  And extracted C++ w/comments at the end of each line about what I see (DataManager is my class of CRUD operations):

  In DataManager.hpp:

  QVariant mCustomDataStructsTopLevel;
  QVariantMap mCustomDataStructsTopLevelMap;
  

  In DataManager.cpp:

  mCustomDataStructsTopLevel = mXda.load(Utils::dataFilePath(customDataStructsFileName));  // XmlDataAccess; verified loading w/no errors
  mCustomDataStructsTopLevelMap = mCustomDataStructsTopLevel.toMap();
  
  qDebug() << "appName element value: " << mCustomDataStructsTopLevelMap["appName"]; // Outputs "MyAppsName" as expected
  qDebug() << "lastId element value: " << mCustomDataStructsTopLevelMap["lastId"]; // Outputs null (specifically: QVariant(, ) ) - this is NOT expected
  qDebug() << "appVersion element value: " << mCustomDataStructsTopLevelMap["appVersion"]; // Outputs null (specifically: QVariant(QString, "") )  - this is NOT expected
  

  OK, I got the feeling (and actually hoped) it was a silly mistake of face-palm on my part (compared to a problem of BB10 who had little chance of getting fixed).

  The problem is that I copy the structure of custom data from Starter to my Active dir to my data directory to first install but do not crush him on subsequent launches, as the copy in the data directory is what the user changes and relies on.  I was not a delete and reinstall on each of my iterations, so I wasn't really loading the modified versions of my XML I wanted--just, I was getting a day old stale version which was actually for the items I didn't expect NULL values for nulls.  DOH!

• PersistentStore.getPersistentObject returns the null value?

  I use a random key to retrieve a shape of the object PersistentStore

  persist is PersistentStore.getPersistentObject (KEY);.

  Works fine on the Simulator (OS 5), when I take the code signed to the device (BB OS 5.0 Bold 8900)

  For some reason, it returns null, without exception. Thereafter any API I inoke on PersistentStore / persist returns null without exception persist even when the null value.

  I don't know if it's one thing to eclipse debugger, but even if the debugger shows that objects are null. Controls null applied in the code seems to fail, what does code see these objects as non-null. Pheww! How is it possible.

  In this code still shows up as null, then safetyTable and orderedkeys. However, the value null check in the failure code.

  At a later stage in the code, when I try to access orderedkeys are null again! Are struggling with this problem for two days, all the pointers would be very comfortable.

                      persist = PersistentStore.getPersistentObject( KEY );
                      persistOrderedKeys = PersistentStore.getPersistentObject(KEY_ORDERED_KEYS);
                      safetyTable = (Hashtable)persist.getContents();
                      orderedKeys = (Vector)persistOrderedKeys.getContents();
                      if (safetyTable == null)
                      {
                          safetyTable = new Hashtable();
  
                          persist.setContents(safetyTable);
                          persist.commit();
                      }
  
                      if (orderedKeys==null)
                      {
                          orderedKeys=new Vector();
  
                          if (safetyTable.size()>0)
                          {
                              Enumeration addressKeys = safetyTable.keys();
                              while(addressKeys.hasMoreElements())
                              {
                                  orderedKeys.addElement((String)addressKeys.nextElement());
                              }
                          }
                          persistOrderedKeys.setContents(orderedKeys);
                          persistOrderedKeys.commit();
  
                      }
  

  "I don't know if it's one thing to eclipse debugger.

  I had problems of this kind when I don't have a level of operating system for the device I am debugging on.

• TMS implemented at level 14.1.1 to 'Get SNMP community name' column does not allow NULL values.

  Hello!

  I had a TMS12.2 (via 12.6 and 13.2) to TMS14.1.1 upgrade.

  When I go to: systems > overview of the system and select all systems and all the settings, I get an error message.

  An order referred before you have a problem with the values of ip box.

  Is it possible that 14.1 upgrade does not correctly check if the empty database fields?

  How I'll fix it, did an upgrade using 14.2, or is it a sql command that must be executed

  (or some values to be defined)?

  Error details:
  Server Error in '/tms' Application.
  --------------------------------------------------------------------------------
  Column 'SNMP Get Community Name' does not allow nulls.
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
  Exception Details: System.Data.NoNullAllowedException: Column 'SNMP Get Community Name' does not allow nulls.
  Source Error:
  An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
  Stack Trace:
  [NoNullAllowedException: Column 'SNMP Get Community Name' does not allow nulls.]
  System.Data.DataColumn.CheckNullable(DataRow row) +2131738
  System.Data.DataTable.RaiseRowChanging(DataRowChangeEventArgs args, DataRow eRow, DataRowAction eAction, Boolean fireEvent) +5073836
  System.Data.DataTable.SetNewRecordWorker(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge, Boolean suppressEnsurePropertyChanged, Int32 position, Boolean fireEvent, Exception& deferredException) +195
  System.Data.DataTable.InsertRow(DataRow row, Int64 proposedID, Int32 pos, Boolean fireEvent) +344
  Tandberg.TMS.UI.SystemOverview.ViewSystemOverviewGrid.CreateDataSource(EmbedLinksSetting embedLinks) +6856
  Tandberg.TMS.UI.SystemOverview.ViewSystemOverviewGrid.DataBindToTMSGrid(EmbedLinksSetting embedLinksSetting) +171
  Tandberg.TMS.UI.SystemOverview.SystemOverviewView.SystemOverviewViewDataBind(EmbedLinksSetting embedLinksSetting) +196
  Tandberg.TMS.UI.SystemOverview.SystemOverviewHost.ShowModule(ModuleActions moduleAction) +115
  Tandberg.TMS.UI.SystemOverview.SystemOverviewHost.systemOverviewFilter_ModuleAction(Object sender, ModuleControlEventArgs e) +43
  Tandberg.TMS.Service.Navigation.TMSModuleBase.FireModuleEvent(ModuleControlEventArgs e) +22
  Tandberg.TMS.Service.Navigation.TMSModuleBase.FireViewAction() +34
  Tandberg.TMS.UI.SystemOverview.SystemOverviewFilter.viewButton_Click(Object sender, EventArgs e) +65
  System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
  System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
  System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
  System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
  System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
  System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563
  

  Hi Martin,

  You see flaws CSCue22625. A fix was published in TMS 14.2.

  Kind regards

  Kjetil

• Group by excluding null values

  I want to run a select using "group by". However, I would like the results to exclude all null values in my area. Like for example the code following, but excluding NULL values.

  Select the FIELD, count (FIELD)

  of MYDATA

  FIELD group;

  How can I do this?

  Hello

  Maybe I don't understand your complete problem, but what of this

  select FIELD, count(FIELD)
    from MYDATA
   where field is not null
   group by FIELD;
  

  concerning
  Kay

• Bar chart stacked - strange behavior on display null values

  Hi all

  I'm trying to graph a county of the end dates of the activities over several years by months grouped by project.

  The problem I have is that there is a gap of 3 months where none of the activities that I am tracking complete. The default value for the stacked bar chart is to ignore the columns with no data (in my case it October-December 2015).

  To view these any given month I went to properties graphic and ticked the box "Include Null values. At this point, I get a very strange behavior. Once this option is selected, the legend explodes, showing each project in the database regardless if it meets my criteria for analysis.

  Has anyone another considering that happen? I'm doing something wrong?

  If it's important I'm in the OBI 11.1.1.7.150120

  Thank you for your help,

  Kevin Wolfe

  
  

  Hello

  You have a filter on the list of projects you want to see?

  Based on the way you describe your analysis I guess you don't have any what filter on the list of projects, but some of the filters on the other dimensions/attributes and these filters were limiting the list of projects.

  If this is the case then what you see is not a weird behavior, but everything you've asked your analysis.

  "Include null values" is not limited to the time dimension, it fits any dimension of your analysis, so no filter on projects = all projects.

• Freeze frame layer twinkle in gamma (?) when following a null value

  I thought I solved the problem by changing the quality and sampling area, but there are still questions, including a slight deformation based on casual. Any suggestions? I tried rendering framework, and with that same question. If I unparent it to my null value, the layer is a freeze frame plain ol again. The first image is fine, the following conditions are significantly different. The circulation area is low and there is no motion blur. The Null value is animated in the Position, scale and Rotation. I tried to disable rotation and scale, the problem persists.

  I had the help of Robert Kjettrup, who suggested that the problem was due to the complexity of the noise in the particular image I've used. Keeping this aspect, he proposed to conceal the lack of precision with a separate (unprocessed) layer which has been re-grainy, then use a mask of track in the areas you will need to re-grain with this layer.

  I normally Denoise my images, but in this case I had left it the shot as he was, so I was not used to meet a problem like this. Thanks also to Rick Gerard for his help also.

• Remove the NULL values and update the value according to the logic

  Hello

  The problem data

  CREATE TABLE VOLA (SRNO, NUMBER, zero

  NUMBER, A

  NUMBER);

  INSERTION of REM in VOLA

  TOGETHER TO DEFINE

  Insert in VOLA (SRNO, ONE) values (1,237.94);

  Insert in VOLA (SRNO, ONE) values (2, null);

  Insert in VOLA (SRNO, ONE) values (3,203.565);

  Insert in VOLA (SRNO, ONE) values (4,170.69);

  Insert in VOLA (SRNO, ONE) values (5,113.67);

  Insert in VOLA (SRNO, ONE) values (6,93.6);

  Insert in VOLA (SRNO, ONE) values (7,82.03);

  Insert in VOLA (SRNO, ONE) values (8,66.675);

  Insert in VOLA (SRNO, ONE) values (9,63.59);

  Insert in VOLA (SRNO, ONE) values (10,61.415);

  Insert in VOLA (SRNO, ONE) values (11,60.015);

  Insert in VOLA (SRNO, ONE) values (12,58.235);

  Insert in VOLA (SRNO, ONE) values (13,57.805);

  Insert in VOLA (SRNO, ONE) values (14,56.965);

  Insert in VOLA (SRNO, ONE) values (15, null);

  Insert in VOLA (SRNO, ONE) values (16, null);

  I have to remove the NULL values in column 1, the problem is that the position of the NULL values are not fixed, and it can be any position. If all the lines of the columns are null, then throw it away.

  If multiple NULL values are here so I have to do the math as follows to update null with the eigenvalues

  1. If the first line is null then take the 2nd value in row and update it.

  2. If the lines between both is null then take avg of prev and next value not null and refresh it.

  3. If the last value in the column is null, then then take prev and update, in this case last two are null, so I have to take value of prev 14 value line update in

  15th and 16th ranks.

  I want to put this pl/sql logic, somehow, that I thought have loop and counter aapproach and loops through the elements and check and update.

  But always looking for something better before looking to write code. No idea or help will be useful for me.

  I * think * you are looking for something like:

  WITH VOLA (SRNO, ONE)

  AS (select 1,237.94 from all the double union)

  Select 2, union null value double all the

  Select 3,203.565 from all the double union

  Select 4,170.69 from all the double union

  Select 5,113.67 from all the double union

  Select 6,93.6 from all the double union

  Select 7,82.03 from all the double union

  Select 8,66.675 from all the double union

  Select 9,63.59 from all the double union

  Select 10,61.415 from all the double union

  Select 11,60.015 from all the double union

  Select 12,58.235 from all the double union

  Select 13,57.805 from all the double union

  Select 14,56.965 from all the double union

  Choose 15, null of union double all the

  SELECT 16, NULL FROM dual)

  GET_VALUES (SELECT SRNO, ONE ACE,

  , LAST_VALUE (WE IGNORE NULLS) (ORDER BY SRNO CSA ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) AS PREVIOUS_VALUE

  , first_VALUE (ONE IGNORE NULLS) over (ORDER OF SRNO CSA ROWS BETWEEN 1 SUITE AND FOLLOWS without TERMINALS) AS NEXT_VALUE

  FROM VOLA)

  SELECT SRNO, ONE, CASE

  WHEN IT IS NOT NULL, THEN WE

  OTHER CASES

  WHEN PREVIOUS_VALUE IS NOT NULL AND IS NOT NULL THEN (PREVIOUS_VALUE + NEXT_VALUE) NEXT_VALUE / 2

  WHEN THE PREVIOUS_VALUE IS NOT NULL, THEN PREVIOUS_VALUE

  WHEN THE NEXT_VALUE IS NOT NULL, THEN NEXT_VALUE

  END

  END AS NEW_VALUE

  OF GET_VALUES

  /

  HTH

• apex5, a null value to the title of the tree made the developer toolbar disappear

  Hello

  With for example the query tree:

  select case when connect_by_isleaf = 1 then 0
              when level = 1             then 1
              else                           -1
         end as status, 
         level, 
         (CASE WHEN "ENAME" = 'KING' THEN null ELSE "ENAME" END) as title, -- null value is evil
         null as icon, 
         "EMPNO" as value, 
         null as tooltip, 
         null as link 
  from "#OWNER#"."EMP"
  start with "MGR" is null
  connect by prior "EMPNO" = "MGR"
  order siblings by "ENAME"
  

  The developer toolbar disappears when there is a value zero in the title. It's very very difficult to detect the problem.

  https://Apex.Oracle.com

  workspace: imagetest_ws

  user: guru

  Pass: meditation

  App: imgtst

  page: 12

  Rgrds Paavo

  Hi Paavo,

  Can I ask what you are trying to achieve by one of the labels by assigning null value?

  Null or an empty string are not useful as a tree node labels. Yet we could be as a minor bug that the area of the tree should be more robust in the JavaScript that it generates.

  Detect the problem (disappears from the dev toolbar) is not different from almost all JavaScript errors. Whenever any client-side behavior seems to not work, for example, no dev toolbar or a tree node does not expand, or a menu is not falling down, or something is not show or hide it should etc, the first thing to check is the browser console log. In this case, it shows the error ' SyntaxError: lack the name of the variable.

  Kind regards

  -John

• Null values

  Hello

  NULL values is not the same as a 'space', because a 'space' is a character, but I can't understand this because in my view, there is no way to insert a 'space' in a column.

  If I write this

  insert into table (col1) values (' '); , then I insert a Null value not a space. which means that a 'space' is a 'Null '.

  clarify the problem for me please.

  I'll clarify for you that you're wrong:

  SQL> create table foo (id number, bar varchar2(10));
  
  Table created.                                     
  
  SQL> insert into foo values (1, null);             
  
  1 row created.                                     
  
  SQL> insert into foo values(2, ' ');               
  
  1 row created.                                     
  
  SQL> set null null
  SQL> select * from foo;                             
  
          ID BAR
  ---------- ----------
          1 null
          2
  

  It is perfectly possible to insert a space into a varchar2 column. I hope that you do not have a trigger that makes a trim() on the column, because an empty string in Oracle is indeed the same thing with the null value.

• Lag() ignore null values performance

  Hello

  I have looked around, but didn't find everybody talks about performance problems specifically with the use of 'IGNORE NULLS' inside of an analytic function of LAG() in a view online.

  This is a cut from the version of my sql, isolated to the question under discussion.

  select * from (
    SELECT /* use_nl (j,gjt,jt) */
       jt.id
      ,COALESCE
        (lag(jt.my_column ignore nulls /* this is the nasty critter */
          ) over (order by jt.order_seq)
        ,0
        )+1 AS start_days
      ,coalesce
        (jt.my_column
        ,last_value(jt.my_column ignore nulls
          ) over (order by jt.order_seq desc)
        ) AS end_days
    FROM  a,bunch,of,tables
    WHERE ...
    ) jt 
  where jt.id = '123456'
  

  If I remove ignores NULL values in the offset, there is no performance problem.

  Last_value() is not affected.

  If I do not use a view inline then performance is very good, although it is no different to explain the plan.

  select ..
  from ...
  where ...
  and id = '123456'
  

  Has anyone come across something like this, or have any suggestions?

  Happy to try to build a test scenario if it contributes to the discussion, but I thought I would just ask the question first.

  Scott

  Scott.Wesley wrote:

  Hello

  I have looked around, but didn't find everybody talks about performance problems specifically with the use of 'IGNORE NULLS' inside of an analytic function of LAG() in a view online.

  If I remove ignores NULL values in the offset, there is no performance problem.

  Last_value() is not affected.

  If I do not use a view inline then performance is very good, although it is no different to explain the plan.

  1. Select...
  2. Of...
  3. where the...
  4. and id = '123456'

  Scott,

  He would not have anything to do with your real problem, since you say that you get different performances during the removal of the IGNORE NULLS clause, but I doubt that you get exactly the same execution plan when online display is deleted these two queries are typically semantically the same.

  If you use the inline view, Oracle cannot push the filter on the ID in the view if the analytical functions partitions not by this ID, because the result will not be the same for the steps: with the online mode, the data is transformed without filtering for the evaluation of the expressions of the LAG etc, and then the filter is applied.

  If you remove the inline view and filter directly, it has a quite different meaning because now the data will be filtered first and then the analytical functions apply to the filtered result set.

  So the case of inline view maybe has to deal with a completely different volume (larger) identical to the variant of view data not online according to the selectivity of the filter - which could explain that the clause "IGNORE NULLS" made a significant difference in performance on this larger volume of data to deal with, but not necessarily.

  Randolf