Null check for a bind variable in view criteria

Hi, Greetings.
I am using Jdeveloper 11.1.2.0.
I have a view object, LocationsView, for locations table of the XE database.
I want to apply a condition, ((:bind_var is null) or (:bind_var is not null and location_id = :bind_var), in this LocationsView.
That is, I want to apply the condition only if the bind variable value is not null.
How can I construct this condition using a declarative view criteria?
Any help and hints on this regard is greatly appreciated.
Regards,
Guru K

Hi,
Thanks for the update and it is working perfectly fine.
Now, how can I set the "ignore null values" option as checked if I am constructing the criteria programmatically using view criteria row and view criteria item at runtime.
Thanks and regards,
Guru K

Similar Messages

Bind variables in views

I am having some performance issues using bind variables in views (Oracle 7.3.4). When I execute the view using '' values the view executes the expected execution plan. When I execute the view using bind variables the execution plan changes to something undesireable. I believe this to be a static execution plan in the case of using bind variables. I have updated all tables referenced by the view and compiled the view; but, the execution plan when using the bind variables does not change. Can you give me some advice on finding out why the execution plan in the case of using bind variables does not change based on the new set of statistics and being re-compiled.

even if you use a literal isn't that automatically
changed into a bind variable during at compile time?That would be the case when your have CURSOR_SHARING = FORCE. The default should be EXACT.
SQL> show parameter cursor_sharing
NAME TYPE VALUE
cursor_sharing string EXACT
SQL>Actually, since you have the constants in the view, and if everyone uses the view, they share the same shared cursor (since the constants are never changing across each use).
If you supplement the view with additional WHERE conditions (when using the view):
SELECT <columns> FROM your_view WHERE <additional_conditions> ;
Ten you might want to look into using bind variables for values used in such additional conditions.

How to fix different execution plan for different bind variable values?

Please find the below query. The execution plan is fine. The problem That I am facing is in some cases for different bind variable values execution plan gets changed and degrades performance. I have used 6 tables here and all of the tables have histogram on all columns. Database version is Oracle 10g and the value of method_opt is 'For all columns size auto'
SELECT l.LineNumber INTO :b0
FROM Lines l ,LineVersions lv ,Statuses s
WHERE (((((((((((l.serviceContractId=:b1 AND l.LineId<>:b2)
AND lv.LineId=l.LineId) AND lv.StatusId=s.StatusId)
AND s.Code IN ('EPR','ERE','EEP','ERP','PRP','PRD','AAC'))
AND NOT (s.CODE='AAC' AND lv.activeto<TO_DATE(:b3,:b4)))
AND lv.EquipmentDetailId=:b5) AND lv.RouteDetailId=:b6)
AND (lv.cargoDetailId=:b7 OR lv.cargoDetailId IN
(SELECT i_cd1.cargoDetailId
FROM CargoDetails i_cd1 ,CargoDetails i_cd2 ,CargoCommodities i_cc1 ,
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((((((i_cd2.cargoDetailId=:b7 AND i_cd1.cargoDetailId<>:b7)
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AND i_cc1.cargoDetailId=i_cd1.cargoDetailId)
AND i_cc2.cargoDetailId=i_cd2.cargoDetailId)
AND i_cc1.commodityId=i_cc2.commodityId))))
AND ((lv.customerGroupId IS NULL AND :b11=0) OR lv.customerGroupId IN
(SELECT cgm1.customerGroupId
FROM CustomerGroupMembers cgm1 ,CustomerGroupMembers cgm2 ,CustomerGroups cg1
WHERE (((cgm2.customerGroupId=:b11 AND cgm1.customerNoId=cgm2.customerNoId)
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After searching in several blogs I have found the below solutions. Please see it and let me know it is correct or not
Solution 1:-Get rid of histogram that does nothing but messes up execution plan by giving below command
exec dbms_stats.gather_table_stats(owner, tablename, method_opt => 'for all columns size 1', cascade => true);
As 6 tables are there I need to execute above command 6 times.
Solution 2:- Use stored outline. Not sure how to get the best execution plan.
I am looking for answers ASAP. Thanks in advance

As you have probably read, bind variables and histograms do not mix well.
Histograms suggest that you have skew in your data such that different values should get different plans
Bind variables exist so that SQL with different supplied values can be shared.
Mix the two together and at parse time with bind variable peeking you get plans for specific values shared for all values.
The solutions you have mentioned are the common approaches, together with a third - use literals not binds if you've got data skew (i.e. your histograms are justified) and don't want shared SQL.
I would have thought that getting rid of some of these histograms may be the right approach if you're none of your application SQL is using literals to benefit from them.
Can you confirm your version of Oracle.
Further reading:
http://jonathanlewis.wordpress.com/2009/05/06/philosophy-1/
http://structureddata.org/2008/03/26/choosing-an-optimal-stats-gathering-strategy/
http://richardfoote.wordpress.com/2008/01/04/dbms_stats-method_opt-default-behaviour-changed-in-10g-be-careful/

Null check for "ora:readFile()" function

Hi,
I want to check whether a particular file is present in a given folder in our local server.In case of success scenario the "ora:readFile()" function is working fine but if the file is not present in the same folder then,this function is getting failed with system exception ,reason:-message can't be null.
Can't we add a null check for this and continue the flow further?
Regards,
N.Das

Hi,
You should first try list operation in file adapter to check for the file then use the readfile() conditionally if file is found.
Try the function to mention the path as
ora:readFile(concat('file:',bpws:getVariableData('Invoke1_FileListing_OutputVariable','filelist','/ns1:filelist/ns1:file/ns1:directory'),'/',bpws:getVariableData('Invoke1_FileListing_OutputVariable','filelist','/ns1:filelist/ns1:file[1]/ns1:filename'))).
This will get you the content in base64encoded format. You can then decode it to get the text format data.
Thanks,
Durga
- It is considered good etiquette to reward answerers with points (as "helpful" - 5 pts - or "correct" - 10pts).*

Error when Setting value to Bind variable in View Link used in HGrid

Hi
I have requirement to pass profile id as bind variable, I have created a VO based on below Query.
select 'N' Is_Selected, 'N' Is_Already_Selected, 'N' Is_Selected_Copy, a.*
from XXPA_STATE_CONST_DTLS_V a, xxpa_state_const_dtls b
where a.child_id = b.child_id(+)
and b.profile_id(+) = :1
View Link Query that is being generated is
SELECT * FROM (select 'N' Is_Selected, 'N' Is_Already_Selected, 'N' Is_Selected_Copy, a.*
from XXPA_STATE_CONST_DTLS_V a, xxpa_state_const_dtls b
where a.child_id = b.child_id(+)
and b.profile_id(+) = :1) QRSLT WHERE PARENT_ID = :Bind_ChildId
it Shows Errors as
## Detail 0 ##
java.sql.SQLException: Missing IN or OUT parameter at index:: 1
could anyone tell what could be the wrong. Do we need to set bind variable in view link Explicitly? or any other alternative.
Its very Urgent.
Regards
Vimal

Hi,
I have faced similar problem some time ago. I could not find any solution except removing bind parameters in where clause. I tried to change binding style but it also didn't work. I think the problem is caused by view link's where clause.

Error with clob column: "No pl/sql translation for the blind type given for this bind variable"

This is reports 11g
I've got a clob column. Reports seems to recognize its type, but if I try to reference it in a format trigger, I get this error at compile time:
"No pl/sql translation for the blind type given for this bind variable"

Actually, Reports is in something better than Forms.
Neither Forms nor Reports do not have "complete" SQL engine (both have only "complete" PL/SQL engine), but have their own SQL parser, which does not understand SQL commands after the database 8.0.
But, in Reports Data Model - SQL Query Statement, we can write "modern" SQL statement (> database 8.0), because Reports sent it directly to the database, without using their own SQL parser.
For example, in Reports Data Model - SQL Query Statement, we can write this (scalar subquery expressions, in bold):
select empno,
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from emp
order by empno;
although scalar subquery expressions was introduced in the database 9.0.1, and in databases 8.0 and 8.1 we should write someting like this:
select emp.empno,
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       emp.deptno,
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from emp,
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order by empno;
Regards,
Zlatko

Invalid Identifier for a bind variable

I am running a sql query and am using bind variables for dates. Running the querry and after putting values for the bind variable I get a message invalid identifier. Could any one help me and tell me what I am doing wrong.
1 SELECT D.NAME_LAST||', '||D.NAME_FIRST DEBTOR,
2 F.CDCS_NBR,
3 F.CDCS_SEQ,
4 F.POSTING_DATE,
5 F.PAYMENT_AMOUNT,
6 ( GREATEST ( NVL ( F.ACCRUED_INT_CAP, 0 ), NVL ( F.ACCRUED_INTEREST, 0 ) )
7 + NVL ( F.ACCRUED_FINE_INTEREST, 0 ) )
8 ACCRUED_INT_CAP,
9 DECODE(CLASS,'V', RUN_INTEREST,'R',(RUN_FINE_INTEREST + RUN_INT_CAP)) RUN_INTEREST
10 FROM TA_DEBT_DEBTOR_LIAB_VW D,
11 TA_FINANCE F
12 WHERE F.POSTING_DATE BETWEEN TO_DATE(&A, 'DD-MON-YYYY') AND
13 TO_DATE(&B, 'DD-MON-YYYY')
14 AND
15 F.FINANCE_CODE = 'PMNT'
16 AND F.PAYMENT_AMOUNT <
17 ( GREATEST ( NVL ( F.ACCRUED_INT_CAP, 0 ), NVL ( F.ACCRUED_INTEREST, 0 ) )
18 + NVL ( F.ACCRUED_FINE_INTEREST, 0 ) )
19 AND F.DEBTORID = D.DEBTORID
20 AND F.CDCS_NBR = D.CDCS_NBR
21 AND F.CDCS_SEQ = D.CDCS_SEQ
22* ORDER BY D.NAME_LAST, D.NAME_FIRST
SQL> /
Enter value for a: 10-JAN-2003
old 12: WHERE F.POSTING_DATE BETWEEN TO_DATE(&A, 'DD-MON-YYYY') AND
new 12: WHERE F.POSTING_DATE BETWEEN TO_DATE(10-JAN-2003, 'DD-MON-YYYY') AND
Enter value for b: 10-JUN-2006
old 13: TO_DATE(&B, 'DD-MON-YYYY')
new 13: TO_DATE(10-JUN-2006, 'DD-MON-YYYY')
TO_DATE(10-JUN-2006, 'DD-MON-YYYY')
ERROR at line 13:
ORA-00904: "JUN": invalid identifier

Replace this line...
12 WHERE F.POSTING_DATE BETWEEN TO_DATE(&A, 'DD-MON-YYYY') AND
with...
12 WHERE F.POSTING_DATE BETWEEN TO_DATE('&A', 'DD-MON-YYYY') AND

How to populate bind variable in view objects where clause in ADF faces

I've got a page with 2 input items.
The user manually enters the first value.
On the second input item I have created a LOV for the item which opens in a popup. How do I restrict the data returned in the LOV using the value entered in the first input item. I have created a bind variable and have included it in the where clause for the view object but how do I populated it.

Here is an example:
Using the HR schema with the EMPLOYEES and DEPARTMENTS tables.
Example is using ADF BC and created an EMPLOYEES entity with an updateable view object for page,
and created a DEPARTMENTS view as a lookup
(SQL: select department_id, department_name from departments where department_name = :DeptName)
1: add method to the backing bean to filter the LOV
public void getTextValueToFilterLOV(ValueChangeEvent valueChangeEvent) {
Object value_from_form = valueChangeEvent.getNewValue();
FacesContext fctx = FacesContext.getCurrentInstance();
Application fapp = fctx.getApplication();
JUFormBinding formBinding = (JUFormBinding)fapp.createValueBinding("#{bindings}").getValue(fctx);
DCIteratorBinding dcBinding = (DCIteratorBinding)formBinding.get("DeptLOVIterator");
ViewObject vo = dcBinding.getViewObject();
vo.setNamedWhereClauseParam("DeptName",value_from_form);
vo.executeQuery();
2. add valueChangeListener to the inputText on the page with an id and autoSubmit="true"
<af:inputText value="#{bindings.LastName.inputValue}" label="#{bindings.LastName.label}" binding="#{backing_DeptForm.inputText3}"
id="inputText3"
autoSubmit="true"
valueChangeListener="#{backing_DeptForm.getTextValueToFilterLOV}">
</af:inputText>
3. reference the LOV with the id name on the partialTriggers property
<af:selectOneChoice value="#{bindings.EmployeesUpdView1DepartmentId.inputValue}"
label="#{bindings.EmployeesUpdView1DepartmentId.label}" binding="#{backing_DeptForm.selectOneChoice1}"
id="selectOneChoice1"
partialTriggers="inputText3">
<f:selectItems value="#{bindings.EmployeesUpdView1DepartmentId.items}"
binding="#{backing_DeptForm.selectItems1}"
id="selectItems1"/>
</af:selectOneChoice>
Summary:
When you entered a text (LastName), that value is passed into the backing bean method.
The Bean method code will find the LOV Iterator and put the value into the bind variable.
Cheers,
Jim

Best Practice for setting bind variable when application loads

I am using JDeveloper 11.1.2.3.
When my application loads, the first unbounded page has a table populated by a named query.
I would like to set the parameter used by the named query when the page loads, to populate the initial data that is displayed.
What is the best practice for a solution to this issue?

user6003393 wrote:
I am using JDeveloper 11.1.2.3.
When my application loads, the first unbounded page has a table populated by a named query.
I would like to set the parameter used by the named query when the page loads, to populate the initial data that is displayed.
What is the best practice for a solution to this issue?Hi,
You can set the bind variable on VO by overriding prepareSession() method in Application Module check this http://docs.oracle.com/cd/E37975_01/web.111240/e16182/bcservices.htm#sthref357
Setting bind variable on runtime http://docs.oracle.com/cd/E37975_01/web.111240/e16182/bcquerying.htm#CHDECJHD
Zeeshan

Warning: No indices selected for this bind variable ??

I have a view object that is read-only and performs a JDBC connection to SQL 2000 server to get the contents of a view in the database. I need to add a couple of bind variables that I can use for searching 'ExecuteWithParams' in my JSF.
When I click 'Add' to add a bind variable, I get the subject warning. My query has the selected attributes with 'AS Emp_No' for instance. If I want to add to the where clause 'AND EMP_NO = :EmpIdVar' as I would do in the Oracle way, how can I do it in the JDBC Positional way and avoid the warning above?
Thanks!

Bug 6041448 details a problem with setting the index positions of a named bind variable when the View Object's binding style is "Oracle Positional" or "JDBC Positional".
The workaround involves not using named bind variables, and just using the ? bind variable indicators in the query without formally defining the named bind variables.
You could adopt a technique like the one described in section "10.5.2 How to Work with Named View Object Bind Variables" of the ADF Developer's Guide for Forms/4GL Developers on the ADF Learning Center (at http://www.oracle.com/technology/products/adf/learnadf.html) as an alternative to using ExecuteWithParams [whose use required named bind parameters]. Instead, you would write a custom method on your view object that accepts your two parameters, then inside this method it would set the correct posititional parameters using setWhereClauseParam().
Once you've added the custom method to the view object's client interface, then you can drop the custom method from the data control palette just like the ExecuteWithParams and use it in basically the same ways.

URGEN: How to programmatically assign bind variables in View Object

Hi,
I have a method action in my pagedef
<methodAction id="SetBindAttributeValueToQuotationsView"
                  InstanceName="QuotationsEBAppModuleDataControl.dataProvider"
                  DataControl="QuotationsEBAppModuleDataControl"
                  MethodName="SetBindAttributeValueToQuotationsView"
                  RequiresUpdateModel="true"
                  Action="999" IsViewObjectMethod="false">
      <NamedData NDName="quotTransNo"
                 NDValue="${bindings.SetBindAttributeValueToQuotationsView_quotTransNo}"
                 NDType="java.lang.Integer" NDOption="2"/>
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Thanks.

hi
u check ur view name & page def binds value,
both of them should be same
thanks

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In the SQL query for my View Object, I have a bind variable, which I set to "required". In the search form resulting from a View Criteria, a textbox shows up asking the user for the value of that variable. Is there a way to make it a List of Values instead?

Hi WV,
Create a transient attribute in your VO that contains the LOV and then set the value of your bind variable to point to this new transient attribute. Also here is another approach
https://blogs.oracle.com/shay/entry/adf_query_with_parameters_and
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-Juan Camilo

Check for empty session variable

Hey there we're making a login for our jsp web application.
The login allready works and so does the log out but now we want to make a check to make it impossible to login with names that are not in the database.
So what basicly happens is as follows...
Login reads the database info:
while (rs.next()) {
     if (request.getParameter("username").equals(rs.getString("username")) && request.getParameter("password").equals(rs.getString("password"))){
          session.setAttribute("username", rs.getString("username"));
          session.setAttribute("firstname", rs.getString("first_name"));
          session.setAttribute("lastname", rs.getString("last_name"));
}but when you enter invalid information teh session variabe "lastname" for example should read null. Now we want to make a check for this null value, which should look something like this:
if(session.getAttribute("username").equals(null)){
     response.setStatus(301);
     response.setHeader("Location", "/index.jsp");
} else {
     response.setStatus(301);
     response.setHeader("Location", "/mainmenu.jsp");
}But this doesnt work, it just logs in with the null values... any1 got a clue??
edit: im actually looking for something like the isSet command in PHP to give an idea...
Message was edited by:
whappit

Your test for null will always fail, because request.getParameter("username") is NEVER null, in that it exists, even though it contains no data.
Try .equals(""); instead.

Checking for an updated variable value in symbol timeline

I'm making a puzzle which involves moving crates in a specific order to get a character from one side to the other. Take a look at http://tinyurl.com/c4vwcj9 to get the gist of it.
Each crate is a symbol with it's own timeline. A crate may only move a pre-determined direction and distance once clicked. No more than 2 crates can be pulled out of the grid at any one time.
The timeline of each symbol has three states: "Original", "Moved" and "Returned".
If you have a play around with the puzzle as it stands so far, you will see most of the logic arguments work ok. However, the problem I have is when you pull a crate out of the grid and it needs to check if it can move back into place.
To see what I mean:
- Pull out the bottom left corner crate
- Move the crate to the immediate right, thereby blocking the previous crate
- Try to move the bottom left corner crate again (you should get an error message and it shouldn't move - this is fine)
- Move the other crate back to it's original position to unblock the previous crate
- Try to move the bottom left corner crate a final time (you still get the error message and it doesn't move - this is not fine!)
A quick debug has revealed the second mouse click doesn't fetch the updated variable AFTER the symbol timeline begins to play, but the same methodology works just fine for crates that check for impeded movement BEFORE a symbol timeline is played (try one of the inner crates). Why isn't it getting the updated value and what can I do to solve it?
Below is a sample of the code specific to the bottom left crate. I've highlighted the variable and arguments specific to the problem. Please excuse what is no doubt poor Javascript coding conventions - I only started learning this last week!
//-- Get needed variables
// Check to see if other crate is impeding movement and define value as a variable
var myCrateCheck = sym.getComposition().getStage().getSymbol("_b_2x1crate_h").getVariable("Crate2");
// Check to see what this crate's status is and define value as a variable
var mySelfCheck = sym.getComposition().getStage().getSymbol("_bl_3x1crate_h").getVariable("Crate1");
// Check to see if other crates have been moved out of the main grid. Parse value as an integer in base 10.
var myGridCheck1 = parseInt(sym.getComposition().getStage().getSymbol("_br_2x1crate_v").getVariable("Crate3_ grid"),10);
var myGridCheck2 = parseInt(sym.getComposition().getStage().getSymbol("_bl_4x1crate").getVariable("Crate4_gr id"),10);
var myGridCheck3 = parseInt(sym.getComposition().getStage().getSymbol("_bl_2x2crate").getVariable("Crate5_gr id"),10);
var myGridCheck4 = parseInt(sym.getComposition().getStage().getSymbol("_cl_2x1crate_h").getVariable("Crate9_ grid"),10);
var myGridCheck5 = parseInt(sym.getComposition().getStage().getSymbol("_cl_1x1crate_1").getVariable("Crate13 _grid"),10);
var myGridCheck6 = parseInt(sym.getComposition().getStage().getSymbol("_cr_3x1crate_h").getVariable("Crate16 _grid"),10);
var myGridCheck7 = parseInt(sym.getComposition().getStage().getSymbol("_tl_2x1crate_h").getVariable("Crate17 _grid"),10);
var myGridCheck8 = parseInt(sym.getComposition().getStage().getSymbol("_tc_2x2crate").getVariable("Crate18_g rid"),10);
var myGridCheck9 = parseInt(sym.getComposition().getStage().getSymbol("_tr_2x1crate_h_1").getVariable("Crate 19_grid"),10);
var myGridCheck10 = parseInt(sym.getComposition().getStage().getSymbol("_tl_3x1crate_h").getVariable("Crate20 _grid"),10);
var myGridCheck11 = parseInt(sym.getComposition().getStage().getSymbol("_tr_2x1crate_h_2").getVariable("Crate 21_grid"),10);
// Create a variable called myGridCheckSum, make sure it's a number and sum the above
var myGridCheckSum = 0;
myGridCheckSum = myGridCheck1 + myGridCheck2 + myGridCheck3 + myGridCheck4 + myGridCheck5 + myGridCheck6 + myGridCheck7 + myGridCheck8 + myGridCheck9 + myGridCheck10 + myGridCheck11;
//-- Logic & Conditional Statements
// If this crate is in any position other than "Moved", and more than 1 box is already out of grid zone - prevent move and alert
if ((mySelfCheck != "Moved") && (myGridCheckSum >1)){
alert('Too many boxes outside of grid zone');
sym.stop();
// Or else, if this crate is in any position other than "Moved", but less than 2 boxes are out of grid zone - allow move
else if ((mySelfCheck != "Moved") && (myGridCheckSum <2)){
sym.play();
// If this crate has moved but the other crate hasn't moved, play remainder of symbol timeline
else if ((mySelfCheck == "Moved") && (myCrateCheck != "Moved")){
sym.play(3001)
// If this crate has moved and the other crate is also moved, alert and loop back on timeline
else if (myCrateCheck == "Moved"){
// Alert user to say crate cannot be moved
alert('This box is being blocked by another!');
sym.play(2999);

Resolved. Silly little syntax error on a variable rewrite on another symbol!

Open cursor for and bind variables

Hello all,
how can I assign values to a bind variable before opening a cursor?
example code:
DECLARE
   TYPE ref_cur_t IS REF CURSOR;
   l_ref_cur   ref_cur_t;
   l_query VARCHAR2 (100)
         := 'select * from table t1 where ndx= :var_index' ;
BEGIN
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   OPEN l_ref_cur FOR l_query;
END;Thanks!

Something like this ->
scott@ORCL>
scott@ORCL>DECLARE
2     l_ref_cur   sys_refcursor;
3     l_query VARCHAR2 (100) := 'select * from emp where empno = :var_index';
4     l_empno number(4);
5 BEGIN
6     l_empno := &emno;
7     -- assign a value to :var_index
8     OPEN l_ref_cur FOR l_query using l_empno;
9 END;
10 /
Enter value for emno: 7698
old   6:    l_empno := &emno;
new   6:    l_empno := 7698;
PL/SQL procedure successfully completed.
Elapsed: 00:00:19.78
scott@ORCL>Regards.
Satyaki De.

Null check for a bind variable in view criteria

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