sessionScope in Bind variable access to a display object

Hi all

I use jdeveloper 11.1.2.3.0

I read some articles and messages on access sessionScope in Bind variable to a display object.
If I understand correctly there is a differnece of opinion about it.

In our applications, we use a lot of views with bind vars that use environment variables.
as for now, we save the environment in the context of the session variables,
and access them with a groovy expression in the var of binding of the VO.
We also try to use adf.userSession.userData. But UserData is reset during the activation or passivation and all values of the variables are lost.

What is the correct way to do it?
Where we should record such as username, role and etc environment variables?
values that are not changed through the whole session.

I would like to know what is the best way to do it.

Thank you very much!

You must store the min the userdata in the model layer (groovy approach). However, you need passivate variables yourself. The framework does not automatically. You need to override the methods of activatesState (Element) in a request to passivate module data that you store in the userData plan and the passivatesState (Document, element).

//In application module implementation class
/**
 * Overridden framework method to passivate user data
 * in XML format by appending to the parent node
 */
@Override
public void passivateState(Document doc, Element parent) {
   //This code snippet stores the data in USERDATA node
  Element nodeUserData = doc.createElement("USERDATA");
  nodeUserData.setAttribute("KEY", "USER_DATA");
  // this sample only store one value regionId!
  nodeUserData.setAttribute("VALUE",
       getRegionId().toString());
  parent.appendChild(nodeUserData);
  super.passivateState(doc, parent);
}
/**
 * Overridden framework method to activate user data from
 * XML snapshot, stored during passivation
 */
 @Override
public void activateState(Element parent) {
   //This code snippet reads the data stored in USERDATA node
  if (parent != null) {
    NodeList nl = parent.getElementsByTagName("USERDATA");
    for (int i = 0; i < nl.getLength(); i++) {

      Element e = (Element)nl.item(i);
      String key = e.getAttribute("KEY");
      String value = e.getAttribute("VALUE");
      setRegionId(new Integer(value));
      break;
    }
  }
  super.activateState(parent);
}
// regionId is made activation safe in this e.g
private Integer regionId = null;

private Integer getRegionId() {
  return regionId;
}

private void setRegionId(Integer regionId) {
  this.regionId = regionId;
}

Timo

Tags: Java

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select * from TABLE2 MTF
WHERE (   (MTF.C6_CODE = TRIM (null)) OR (NVL (null, 'NONE') = 'NONE'))
 AND (   (MTF.C3_CODE = 'NONE') OR (NVL ('NONE', 'NONE') = 'NONE'))
  AND (   (MTF.C4_CODE = null)  OR (null IS NULL))
   AND (   (MTF.C5_AMT <= 0)  OR (NVL (0, 0) = 0))
  AND (   (MTF.C5_AMT >= 0)  OR (NVL (0, 0) = 0));
Execution Plan
----------------------------------------------------------
Plan hash value: 1536592532
-----------------------------------------------------------------------------------------------------------
| Id  | Operation                  | Name         | Rows  | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
-----------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT           |              |    45M|  9151M|   358K  (1)| 01:11:41 |       |    |
|   1 |  PARTITION RANGE ALL       |              |    45M|  9151M|   358K  (1)| 01:11:41 |     1 |  2 |
|   2 |   TABLE ACCESS STORAGE FULL| TABLE2 |    45M|  9151M|   358K  (1)| 01:11:41 |     1 |  2 |
-----------------------------------------------------------------------------------------------------------

select column_name,num_nulls,num_distinct,density
from dba_tab_col_statistics where table_name='TABLE2'
and column_name in ('C3_CODE','C4_CODE','C5_AMT','C6_CODE');
C3_CODE 0 65 0.0153846153846154
C4_CODE 0 2 0.5
C5_AMT 0 21544 4.64166357222429E-5
C6_CODE 1889955 71 0.0140845070422535

    933257 wrote:

    ((SF. C1_IDCODE =: B4) OR (NVL (: B4, 'NONE') = 'NONE'))

    In fact for literals, I did not find any section of the predicate after running the sql code with activation "set autotrace traceonly explain."

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    What is it - producing distinct SELECT queries to determine if you have a real value to filter or not you end up with DIFFERENT execution plans for each of them, and each of them is OPTIMAL for this particular set of filters.  Now you get good performance for each variation of the performance of the SELECTION, rather than sometimes good and sometimes very bad when using SELECT only one.  It is impossible to try to get multiple shots of execution 'optimal' out of a SELECT query.  That's why you get mediocre performance under different bound the values of the variables.

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    After the extension of the view object, the invoice distribution line is displayed as no record found. In my opinion, it is due to not having bind variables does not correct parameters being passed, and under this point of view object is an object depending on the invoice header record.

    Will be very grateful if someone can provide the way forward in dealing with this situation.

    Rgds

    Fahad

    User, please ask your question in the forum OA Framework .

    Timo

  • Convert SQL to take advantage of the Bind Variables

    Hi all

    Is it possible to convert the SQL below so I can enjoy variable Bind?  It's just my personal way of followed by the name of the script that I use on a daily basis... the file is passed to a point that its about 2K lines long, and whenever I run this specific file to get a script name, it creates a new SQL in the database pool shared... I tried to change this option to use bind variables , but it doesn't seem to work properly and I wanted what suggestion of the community...

    ACCEPT script_name_like prompt 'ENTER SCRIPT NAME OR HIT ENTER TO GET ALL SCRIPT NAME OR PUT PART OF THE SCRIPT NAME : ' 
WITH help_script AS
( SELECT 'top_seg_tab_obj_ash'                    AS Script_Name,
                    'top segment by tot wait time' AS Description,
                    '# of mins to go back'            AS INPUT
   FROM dual  
  UNION ALL SELECT 'v$_tab'                    AS Script_Name,
                    'shows list v$ views' AS Description,
                    'view name like'            AS INPUT
   FROM dual
  UNION ALL SELECT 'dba_tab'                    AS Script_Name,
                    'shows list dba views' AS Description,
                    'view name like'            AS INPUT
   FROM dual
  UNION ALL SELECT 'nls_params'                    AS Script_Name,
                    'shows list of current NLS setting for DB/INST/SESS' AS Description,
                    'no Input Needed'            AS INPUT )
SELECT upper(script_name) AS "MY SCRIPT NAME",
       upper(description) AS description,
       upper(INPUT) AS INPUT
FROM help_script
WHERE script_name LIKE nvl('%&script_name_like%', script_name) ;

    Hello

    user13454469 wrote:

    Hi all

    Is it possible to convert the SQL below so I can enjoy variable Bind?  It's just my personal way of followed by the name of the script that I use on a daily basis... the file is passed to a point that its about 2K lines long, and whenever I run this specific file to get a script name, it creates a new SQL in the database pool shared... I tried to change this option to use bind variables , but it doesn't seem to work properly and I wanted what suggestion of the community...

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    2. WITH help_script AS
    3. (SELECT "top_seg_tab_obj_ash" AS Script_Name,
    4. "upper segment by tot queue time" AS Description,.
    5. "# of minutes to go back" AS INPUT
    6. OF the double
    7. UNION ALL SELECT ' v$ _tab "AS Script_Name,.
    8. "Show list views$ v ' AS Description,.
    9. 'show the name as' AS ENTRY
    10. OF the double
    11. UNION ALL SELECT 'dba_tab' AS Script_Name,
    12. "Show list views dba" AS Description,.
    13. 'show the name as' AS ENTRY
    14. OF the double
    15. UNION ALL SELECT 'nls_params' AS Script_Name,
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    VARIABLE script_name_like_b VARCHAR2 (30)

    EXEC: script_name_like_b: = '% & script_name_like;

    WITH the help _script AS

    ...

    WHERE script_name AS NVL (: script_name_like_b, script_name);

  • SP2-0552: Bind variable

    Hello

    I get this error during the execution of the following:

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    2

    V_task VARIABLE 3: = "tache_338";

    4

    5 BEGIN

    (6) DBMS_SQLPA.execute_analysis_task

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    8 execution_type = > "test run."

    9 execution_name = > 'after_change');

    10 END;

    11.

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    Thank you.

    Hello.

    Note:

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    execution_type 8-online 'run test ',.

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    10 END;

    11.

    See the link: DBMS_SQLPA

    Scripts SQL help * more

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    Hello

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    SELECT ProjectEO.PROJ_ID,

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    VEmployeeInfoEO.LASTNAMEFIRSTNAME,

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    ProjApprovalDecisionDtlEO.APPROVEDDATE,

    ProjectEO.SYS_STATUS,

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    PTS. V_EMPLOYEE_INFO VEmployeeInfoEO,

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    and PROJAPPROVEREO. PROJ_ID in: PROJID

    Thank you!


    Please refer to http://www.jobinesh.com/2010/09/using-bind-variable-for-sql-statements.html?m=1 for an example of this.

    Timo

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