RE: Urgent help Needed - Join Query

rambabu.piridi Tue, 18 Apr 2006 21:21:13 -0700

Here i am giving the complete information:

I have defined two result maps.

</resultMap>

</resultMap>

These are my bean classes:

public class User {

public User()
{

}

private List listDynamicProperties;

private String userid;

private String username;

private int role;

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public int getRole()
{
return role;
}

public void setRole(int role) {
this.role = role;
}

public String getUserid() {
return userid;
}

public void setUserid(String userid) {
this.userid = userid;
}

public List getListDynamicProperties()
{
return listDynamicProperties;

}

public void setListDynamicProperties(ArrayList listDynamicProperties1)
{
this.listDynamicProperties = listDynamicProperties1;

}

}

public class DynamicProperty {

private String propertyName;
private String propertyValue;

/*
* name and value should not be null.
* If null throw Exception.
*/
public DynamicProperty()
{

}

    public String getPropertyName() {
        return propertyName;
    }

    public void setPropertyName(String propertyName) {
        this.propertyName = propertyName;
    }

    public String getPropertyValue() {
        return propertyValue;
    }

    public void setPropertyValue(String propertyValue) {
  System.out.println("Setting DynamicProperties");
        this.propertyValue = propertyValue;
    }

The data in the data base is:

USR_BASIC_INFO :

USR_ID, USR_NAME, ROLE_ID

1, xxxx, 200

2, yyyy, 300

USR_EXTENSION_INFO:

USR_ID, PROPERTY_NAME, PROPERTY_VALUE :

1, city, foster city

1, state, california

2, city, hyd

2, state, ap

My select query is:

select BASIC.USR_ID, BASIC.USR_NAME, BASIC.ROLE_ID,EXTENSIN.PROPERTY_NAME,EXTENSIN.PROPERTY_VALUE from USR_BASIC_INFO BASIC, USR_EXTENSION_INFO EXTENSIN where BASIC.USR_ID=EXTENSIN.USR_ID;

</select>

Now i am getting four results. where i am expecting two results.

i am getting the result as "4 User objects" and the data as:

1,xxxx, 200, city, foster city

1,xxxx, 200,state, california

2,yyyy,300,city, hyd

2,yyyy,300,state, ap

But i am expecting two User objects. And each User should contain List of dynamicProeprties object. Is it problem in Ibatis?.

From: Poitras Christian [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 18, 2006 9:40 PM
To: [email protected]
Subject: RE: Urgent help Needed - Join Query

First, I believe you should make a link between your 2 objects.

In User add a List property that will contain user addresses. With this solution it will be easy to populate User and Address List at the same time.

Also add this in the User resultMap.

And the query "getAddressByUser" will contain

select * from User, Address where User.UserId = Address.UserId and User.UserId = #value#

You can also populate the User and it's Addresses in one call.

Christian

[EMAIL PROTECTED]

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 18 April 2006 11:22
To: [email protected]
Subject: Urgent help Needed - Join Query

Hi,

I have two tables User and Address. The primary key of the User table is also the foreign key of Address table.

It is possible that a user may or may not have address ( Property ) associated with him and also one user can have more than one address (property). I have two Java classes which are useful to set and get the values of the data members.

public class User {

         private String UserId ;
         private String UserName;
         private String Designation;
         private String Address;

public String getAddress() { return Address; }

public String getDesignation() { return Designation; }

public String getUserId() {  return UserId; }

public String getUserName() {  return UserName; }

public void setAddress(String address) {  Address = address; }

public void setDesignation(String designation) { Designation = designation; }

public void setUserId(String userId) { UserId = userId; }

public void setUserName(String userName) { UserName = userName; }

}

public class Address

{

private String UserId;
private String City;
private String State;

public String getCity() { return City; }

public String getState() { return State; }

public String getUserId() { return UserId; }

public void setCity(String city) { City = city; }

public void setState(String state) { State = state; }

public void setUserId(String userId) { UserId = userId; }

}

The following table shows the structure of the table.

User

===============

UserId - PrimaryKey

UserName

Designation

Address

===============

UserId - ForeignKey

City

State

the following table data is an example data.

User

======================================================

UserId UserName Designation Address

1 Abc S.E City, New Yark

2 Xyz S.E ---

3 Cde P.M ----

Address

=======================================================

UserId PropertyName PropertyName

1 City New Yark

1 Country America

2 -- ---

3 City NewYark

4 City London

When I am trying to get the data from both the tables using the following Query

select * from User, Address where User.UserId = Address.UserId

the result is

1, Abc , S.E

1, City, New Yark

1, Country, America

Now my requirement is to get the data from both the tables and store them as User Object.

Can any one specify

1. IBatis SQL Mappings for the tables.

2. SQL Qury to get the data from both the tables and store it in User Object.

regards,

rambabu

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