Confusion in executeQuery() method of ViewObject
Hi,
Can any one tell me executeQuery() method of ViewObject is actually going in database or what ?
how do it fetches the records ? I mean whether to go in database or from cache ? how does the viewobject knows from where to fetch data?
Thanks,
Janak
Hi,
cannot spare you from reading the documentation, sorry
ViewObjects
==========
http://download.oracle.com/docs/cd/A97339_01/doc/bc4j/BC4JRuntimeFiles/obcVOQuery.htm
ADF BC Developer Guide
===================
http://download-uk.oracle.com/docs/html/B25947_01/toc.htm
Especially the developer guide is a good source of information if you are new to ADF Business Components. Most of the questions asked here on the forum can be answered by copy and pasting from this document
Frank
Similar Messages
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ExecuteQuery method of view object taking much time to execute
Hi All,
I am using a view object and execute the VO query using executeQuery method in VOImpl java.
But, problem is, it is taking long time to bring the results after executing the query after setting the parameters. Same query in TOAD gives 4 seconds. While executing using executeQuery method, it is taking 5 mins.
It is urgent issue. Please help me. Thanks.
Regards, SooryaHi Kali,
Thanks for your prompt response.
Yes. It has bind parameters. I have printed the statement before and after the executeQuery method
++VOImpl Code snippet++
setWhereClauseParams(params);
System.out.println("before executing query:Time:"+System.currentTimeMillis());
executeQuery();
System.out.println( "after executing query:Time:"+System.currentTimeMillis());
+++
I have removed some conditions in the query as it is business confidential. Please find the jdev log.
++++++++
before executing query:Time:1322071711046
[724] Column count: 41
[725] ViewObject close prepared statements...
[726] ViewObject : Created new QUERY statement
[727] ViewObject: VO1
[728] UserDefined Query: SELECT DISTINCT
ai.invoice_num invoice_num
FROM ap_invoices_all ai
, ap_checks_all ac
WHERE ...
ai.org_id = :p_orgid
AND ac.id = :p_id
[729] Binding param 1: ,468,
[730] Binding param 2: 247
[731] The resource pool monitor thread invoked cleanup on the application module pool, AM, at 2011-11-23 23:41:32.781
after executing query:Time:1322072052875
+++++++
Regards,
Soorya -
Overriding executeQuery Method in VOImpl in oaf
Hi All,
I am trying to override executeQuery method in my extended VOImpl method.
The VO that I extended is JobsWithGradeLovVO.
This is what I am writing in my method:
public void executeQuery(){
writeLog("In the executeQuery");
OADBTransaction tx = ((OAApplicationModuleImpl)getApplicationModule()).getOADBTransaction();
String where_grade = getCustomWhereClause(tx);
this.setBindingStyle(1);
writeLog("The binding style is: "+this.getBindingStyle());
writeLog("The where clause is: "+where_grade);
this.setWhereClause(null);
this.setWhereClauseParams(null);
this.setWhereClauseParam(0, where_grade);
//this.setWhereClause(where_grade);
String query = this.getQuery();
writeLog("The query is: "+query);
super.executeQuery();
I modified the where clause of the Query in the xml as (I added and vg.grade_id not in : 0 at the end of the where clause. The rest of it is the seeded one.):
job.job_group_id = jgr.job_group_id and jgr.internal_name = 'HR_'||:4 and (jgr.business_group_id = :5 or jgr.business_group_id is null) and job.business_group_id = :6 and :7 between job.date_from and nvl(job.date_to ,:8) and job.job_id=vg.job_id(+) and :9=:9 and :10 between nvl(vg.date_from(+),:11) and nvl(vg.date_to(+),:12) and hl.lookup_type(+)='YES_NO' and hl.lookup_code(+)=nvl2(vg.valid_grade_id,'Y',(decode(:13, -1,'', 'N'))) and pos.position_id(+)=:14 and job.job_id=pos.job_id(+) and :15 between nvl(pos.effective_start_date(+),:16) and nvl(pos.effective_end_date(+),:17) and vg.grade_id not in : 0
I could observe that there is another "and" condition that is getting appended at the run time which is AND (( UPPER(job.NAME) like UPPER( :2) ).
When I try to run the page, I am getting Missing IN OR OUT PARAMETER at index 3.
Could anyone please help me by letting me know the solution to this.
Thanks,
SrikanthdoSelect() is not related to view object functionality.
View Object's perform their own query, but coordinate via attribute mapping metadata, with underlying EO's.
doSelect() is invoked on an Entity instance when:
[list]
[*]The entity instance needs to lock its row in the database (the lock boolean flag will be true if this is the case)
[*]The entity instance needs to be faulted into memory either because of a findByPrimaryKey() in progress, or because business logic has referenced an attribute of the entity that was not already in the cache due to some view object's querying it.
[list] -
I'm confused about accessor methods.
Part of the application I'm developing translates a sequence of strings into a series of hex values. The number of strings will be either 2 or 3. In the cass where there's 3 strings the last would represent an integer or a decimal fraction.
I have a class Xlate that has 3 translation methods thus:
public int[] translate(String msg) {};
public int[] translate(String msg, int val) {};
public int[] translate(String msg, String aValString) {};
The problem I have is that the Xlate does not return what is expected when passed an argument via the method signature. If explicitly passed a string sequence it works OK.
If I pass the argumants... "pause" "21.09876"
I would expect to see a translation of ... "msg translation array = 76,98,10,20,0A"
What I get is "msg translation array = FF, FF, FF, FF,FF" which indicates the array has not been amended after initialised.
This is most likely due to the lack of accessor definitions and their use. HOWEVER, I am confused by such methods.
I now realise that to pass values setter/getter accessor methods are .
I think these might be along the lines of the following:
private String[] commandList; // declares a string variable
public Xlate() { this(""); }
public Xlate(String[] msg) { this.commandList = msg[1]; } // holds the name
public String getCommandStrings() { return this.commandList; } // gets the commandList
I can't get this to work and know these are not correct.
I need help to get me moving ahead of this problem. Any help would be appreciated.
Thanks.
Philip
import java.lang.String;
public class Control {
public Control() {
int i;
static final public Xlate x = new Xlate();
// static final public Comms rc = new Comms();
public static void main(String[] args) {
String cmd[] = args;
for (int i=0;i<args.length;i++)
cmd=args[i];
controller(cmd);
// public static void controller(String portName, String command, String parameter) {
public static void controller(String[] parameters) {
Control c = new Control();
int[] msg ={1,1,1,1,1};
// Booleans 'pragmaN' are used to select/deselect debug statements
// though would be embedded in the bytecode
// so these are not compiler directives
boolean pragma1=true, pragma2=true, pragma3=true; // toggle using !
int pVal;
if (pragma1==true) {
System.out.print("msg array = ");
for (pVal=0; pVal<4;pVal++)
System.out.print(Integer.toHexString(msg[pVal]).toUpperCase() + ",");
System.out.println(Integer.toHexString(msg[pVal++]).toUpperCase());
// rc.setupComPort(parameters[0]); // Configure the port referenced
msg = x.translate("start"); //*********TRANSLATE()************
msg = x.translate("pause","12.34567"); //*********TRANSLATE()************
if (pragma2==true) {
System.out.print("msg translation array = ");
for (pVal=0; pVal<4;pVal++)
System.out.print(Integer.toHexString(msg[pVal]).toUpperCase() + ",");
System.out.println(Integer.toHexString(msg[pVal++]).toUpperCase());
// rc.writeCmd(msg);
// Control messages have 3 fixed formats comprising 'a string', 'a string
// plus an integer' and 'a String plus a String'.
// For the control messages with an argument a string is constructed before
// translation by parging the arguments.
// Do ensure the number of args is greater than 1 and less than 3.
// Converts integer types to Strings
String argString="";
System.out.println("arg len = "+ parameters.length);;
switch (parameters.length) {
case 2:
System.out.println("in switch 2");;
argString = (parameters[1]);
msg = x.translate(argString); //*********TRANSLATE()************
if (pragma3==true) {
System.out.print("msg translation array = ");
for (pVal=0; pVal<4;pVal++)
System.out.print(Integer.toHexString(msg[pVal]).toUpperCase() + ",");
System.out.println(Integer.toHexString(msg[pVal++]).toUpperCase());
break;
case 3:
if (pragma3==true) {
System.out.println("in switch 3"); ;
argString = (parameters[1] + parameters[2]);
msg = x.translate(argString); //*********TRANSLATE()************
if (pragma3==true) {
System.out.print("msg translation array = ");
for (pVal=0; pVal<4;pVal++)
System.out.print(Integer.toHexString(msg[pVal]).toUpperCase() + ",");
System.out.println(Integer.toHexString(msg[pVal++]).toUpperCase());
break;
default:
System.out.println("Argument length error");
break;
// rc.writeCmd(msg);
import java.text.*;
import java.text.StringCharacterIterator; // required for CharacterIterator class
public class Xlate {
private String[] commandList; // declares a string variable
public Xlate() { this(""); }
public Xlate(String[] msg) { this.commandList = msg[1]; } // holds the name
public String getCommandStrings() { return this.commandList; } // gets the commandList
// These methods form a basic translation mechanism used as proof
public int[] translate(String msg) {
int[] paramList = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; //initialise this array
//Power On and Off controls
if (msg == "start") {
paramList = new int[] {
0xFF, 0xFF, 0xFF, 0x01, 0x20};
if (msg == "stop") {
paramList = new int[] {
0xFF, 0xFF, 0xFF, 0x00, 0x20};
return (paramList);
public int[] translate(String msg, int val) {
int[] paramList = {};
int pVal;
// Memory recall with memory ID.
if (msg == "M") { // Recall memory
paramList = new int[] {
0xFF, 0xFF, 0xFF, 0xFF, 0x02};
// stuff the argument in to the paramList array
paramList[3] = Integer.decode(Integer.toHexString(val)).shortValue();
return (paramList);
public int[] translate(String msg, String aValString) {
// Convert the string
int i, j, k;
int index = 0, c = 0;
int[] p, paramList = {};
final StringBuffer result = new StringBuffer(); // only ever one buffer
char character;
if (msg == "pause") {
paramList = new int[] {
0xFF, 0xFF, 0xFF, 0xFF, 0x0A};
// The period character is the axle where operations centre...
// working from the left most position index until period is found.
// append chars to result string en route.
// if period then stop - this is the integer part
StringCharacterIterator sci = new StringCharacterIterator(aValString);
result.append('0'); // a fudge to pad out the resulting string
character = sci.current();
while (character != '.') {
//char is not a period so append to buffer
result.append(character);
character = sci.next();
character = sci.next();
// working from the position of 'the period character' append chars to result string en route.
// stop at the end having bound the fraction part
while (character != StringCharacterIterator.DONE) {
result.append(character);
character = sci.next();
aValString = result.toString(); // save the result
sci = new StringCharacterIterator(aValString);
String[] part = {
"00", "00", "00", "00"}; // array index ordered 0 to 3 from left to right
result.delete(0, result.capacity()); // initialise the StringBuffer result
character = sci.first();
for (index = 0; index <= 3; ++index) {
for (i = 0; i <= 1; ++i) {
if (character != StringCharacterIterator.DONE) {
result.append(character);
character = sci.next();
else {
result.append('0');
part[index] = result.toString();
result.delete(0, result.capacity()); // initialise the StringBuffer result
// the sequence handles the conversion of decimal to packed BCD for transmission
for (k = 0; k <= 3; k++) {
// cast the String in the array part indexed by k to an int
i = Integer.parseInt(part[k]);
for (j = 0; j < 10; j++) {
if ( (i >= (j * 10)) & (i < ( (j + 1) * 10))) {
paramList[k] = (j * 0x10 + (i - (j * 10)));
return (paramList);Sorry, this is way too much to look at (at least for me). Please create a small test function that fails & post the formatted code. In doing this, you may even spot the problem yourself!
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Slightly confused about notify method
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marktheman wrote:
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say must use notifyAll() or notify() call. Is this true?no.
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Justin -
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Hello guys,
I like to know the only purpose of static method is to call a method with out creating
instance of that class.
I am totaly confused why and where to use static methods.
Thanks in advance
aneeshLook at the API docs for some of the static methods in classes like java.lang.String, java.lang.Integer, java.lang.Thread, etc.
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Static methods are used when the operation you're performing isn't associated with any particular instance of that class--it doesn't use or modify the state of a particular object. The operation is associated with the class as a whole.
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The objects in the Vector (or whatever collection
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Hi Nico,
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<?xml version="1.0" encoding="UTF-16"?>
<env:Envelopes xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Envelope>
<env:Header>
<SessionID></SessionID>
</env:Header>
<env:Body>
<dis:AddObject xmlns:dis="http://www.sap.com/SBO/DIS" CommandID="Add GL Account">
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<BO>
<AdmInfo>
<Object>oChartOfAccounts</Object>
</AdmInfo>
<ChartOfAccounts>
<row>
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<FatherAccountKey></FatherAccountKey>
<FormatCode></FormatCode>
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</ChartOfAccounts>
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</BOM>
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<SessionID></SessionID>
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Don't forgot to say thanks by giving "Kudos" if I helped solve your problem.
When a solution is found please mark the post that solves your issue.
Every problem has a solution! -
Enhancement to ADF ViewObjects
An Additional enhancement request regarding ADF/BC4J.
i would like to have ViewObjects that has INSERT MODE and QUERY MODE similar to Oracle Forms.
When an Orcale Form is launched, a default new blank record is displayed on the screen and the only time data is fetched from the database is when u enter query mode and then execute the query. And that is using only one Datablock.
In Oracle ADF/JSF, we can replicate that by setting the ViewObject maxfetchsize to zero upon creation of the ViewObject object. When the page associated with the viewObject launches, I will just execute a CreateInsert on pageLoad (invokeAction). To enter Query mode, I will have a backing Bean action that resets the maxfetch size to a positive number and then execute the query.
Then I override the ViewObject's executeQuery() method so that after calling "super.executeQuery()", is will reset the fetch size again to zero.
Now, my request is if the ViewObject can have this functionality BUILT-IN so that I won't have to create a custom backing bean action.
regards,
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thanks
Frank -
Migration 9.0.3.3 - 9.0.4.0 : Problem with executeQuery()
I have a problem with the viewObject.executeQuery() method.
I have a viewObject "Response" with following SQL :
SELECT response.target_id,
response.survey_user_id,
response.question_id,
response.question_option_pos,
response.response responsetxt
FROM response
WHERE response.target_id = :1
AND response.survey_user_id = :2
AND response.question_id = :3
The I have following class :
package ch.xxx.survey.webclient;
import oracle.jbo.ApplicationModule;
import oracle.jbo.ViewObject;
import oracle.jbo.domain.Number;
import oracle.jbo.Row;
import oracle.jbo.client.Configuration;
import java.sql.SQLException;
import ch.xxx.survey.model.services.common.*;
import ch.xxx.survey.model.viewobjects.*;
public class DataManipulation {
ApplicationModule applicationModule;
public DataManipulation(ApplicationModule am) {
applicationModule = am;
public void insertUpdateResponse(Number targetId, Number surveyUserId, Number questionId, Number questionOptionPos, String response) {
Number localQuestionOptionPos = questionOptionPos;
String localResponse = response;
//Search the question renderer
ViewObject voQuestion = applicationModule.findViewObject("Question");
voQuestion.setWhereClauseParam(0, questionId);
voQuestion.executeQuery();
String qRenderer = voQuestion.first().getAttribute("QuestionRendererId").toString();
ViewObject voResponse = applicationModule.findViewObject("Response");
//Search if the response already exists
System.out.println("SEARCH : " + targetId + "/" + surveyUserId + "/" + questionId);
voResponse.setWhereClauseParam(0, targetId);
voResponse.setWhereClauseParam(1, surveyUserId);
voResponse.setWhereClauseParam(2, questionId);
voResponse.executeQuery();
if (voResponse.getRowCount() == 1) {
System.out.println("UPDATE TABLE");
ClientResponseRowImpl row = (ClientResponseRowImpl) voResponse.next();
System.out.print(row.getTargetId().toString());
System.out.print(" / " + row.getSurveyUserId().toString());
System.out.print(" / " + row.getQuestionId().toString());
System.out.println(" / " + row.getQuestionOptionPos().toString());
row.setQuestionOptionPos(localQuestionOptionPos);
row.setResponseTxt(localResponse);
row.getResponse().validateQuestion();
} else {
System.out.println("INSERT TABLE");
ClientResponseRowImpl row = (ClientResponseRowImpl) voResponse.createRow();
System.out.print("targetID=" + targetId);
row.setTargetId(targetId);
System.out.print(" / surveyUserId=" + surveyUserId);
row.setSurveyUserId(surveyUserId);
System.out.print(" / questionId=" + questionId);
row.setQuestionId(questionId);
System.out.print(" / questionOptionPos=" + localQuestionOptionPos);
if (localQuestionOptionPos != null)
row.setQuestionOptionPos(localQuestionOptionPos);
System.out.println(" / response=" + localResponse);
row.setResponseTxt(localResponse);
voResponse.insertRow(row);
row.getResponse().validateQuestion();
public static void main(String[] args)
ApplicationModule am = Configuration.createRootApplicationModule("ch.xxx.survey.model.services.WebClientModule", "WebClientModuleLocal");
DataManipulation aDataManipulation = new DataManipulation(am);
try {
aDataManipulation.insertUpdateResponse(new Number("1"),
new Number("1135"),
new Number("144"),
new Number("0"),
"Yves");
aDataManipulation.insertUpdateResponse(new Number("0"),
new Number("1"),
new Number("2"),
new Number("3"),
"xx");
} catch (SQLException e) {
e.printStackTrace();
I run the main() method on JDeveloper 9.0.3.3 and all is perfect. The two "insertUpdateResponse" make an Insert.
I run the same code on JDeveloper 9.0.4.0 and the result is wrong. The first "insertUpdateResponse" make an Insert and the second make an Update !!!
The seconde executeQuery() find always one record (the first inserted record).
The output is
SEARCH : 1/1135/144
INSERT TABLE
targetID=1 / surveyUserId=1135 / questionId=144 / questionOptionPos=0 / response=Yves
SEARCH :0/1/2
UPDATE TABLE
1 / 1135 / 144 / 0
Any Idees ?
Thanks YvesI'd suggest logging a TAR with Metalink so support can triage your testcase and try to get to the bottom of what's causing it. We're not aware of any upward compatibility issues at this time, other than the change in default behavior of the jbo.viewlink.consistent property from FALSE that it was in 9.0.3.3 to DEFAULT that it is in 9.0.4.
The DEFAULT mode in 9.0.4.0 has viewlink consistency default to TRUE for views with a single non-reference entity usages, and FALSE for view objects with two or more non-reference entity usages.
But if setting this setting back to false had no impact on your testcase, it must be something else that needs diagnosing. -
Detail VO executeQuery question
Hi
I'm unclear on when executeQuery is fired for a detail ViewObject.
In my project I've overridden executeQuery() in my detail ViewObject and expect it to fire each time there is a parent VO RowSet navigation event. I find this is not the case. The detail VO's executeQuery() method is only fired the first time it is called.
Is the answer to create a Master RowSet navigation event listener in the Detail VO?
thanks
JohnA VL is a master RowSetIterator controlling a detail RowSet. When you navigate the master, then detailVO.executeQueryForCollection() is called with the detail QueryCollection (a frontman for the RowSet). So if you want to monitor that, you should override that method.
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Sascha -
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In my code when i tried to get the viewobject rows, which had a viewlink created inside the code using the createLink() method, the viewobject is coming as with zero row count.
I tried , vo.setRangeSize(-1) , vo.executeQuery() as well but still its not updated.
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Error with ExecuteQuery() in prepared statement
Hello,
i' m a new one at java. I' m trying to build a web application in jsp and i have a problem in a simple at log in authentication.
My code is this:
<html>
<head>
<title>Welcome to the online Boat Shop, Inc.</title></head>
<body>
<%@ page language ="java" import = "java.io.*, java.lang.*, java.sql.*" %>
<% try
String strUsername = request.getParameter("USERNAME");
String strPassword = request.getParameter("PASSWORD");
Class.forName ("org.apache.derby.jdbc.ClientDriver");
Connection myConn = DriverManager.getConnection("jdbc:derby://localhost:1527/boatsdb","tony", "logo");
String strSQL = "SELECT USERNAME, PASSWORD FROM BOATDB where USERNAME = ? and PASSWORD = ?";
PreparedStatement stmt = myConn.prepareStatement(strSQL);
stmt.setString(1, "USERNAME");
stmt.setString(2, "PASSWORD");
ResultSet myResult = stmt.executeQuery(strSQL);
if(myResult.next()){
out.println("Login Succesful! A record with the given user name and password exists");
} else {
out.println("Login Failed. No records exists with the given user name and password");
myResult.close();
stmt.close();
myConn.close();
} catch(Exception e){
out.println(e);
%>
</body>
</html>
The problem is that prepared statement doesn't support executeQuery() method and i can find any solution. The error is this:
java.sql.SQLException: Method 'executeQuery(String)' not allowed on prepared statement. I already have some data in my database so that it can return results.
Thank you.
Edited by: antonis on May 3, 2008 6:13 AMthank you, that was the problem. It seems that i have also done mistakes in passing the username and password from the forms to the database for checking, because the message that i get always when i log is that there is no user with this username kai password.
<form method=GET action=log1.jsp>
<font size=5> Username <input type=text name="USERNAME" size=20>
</font>
<br>
<font size=5> Password <input type=text name="PASSWORD" size=20>
</font>
<br>
<input type=submit name=action value="Submit">
</form>
That's the forms and combined with the code in the fist post should have worked. Any ideas?
thanks again.
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