multiple data source indexing through data import handler

[Qiu Mo]

I am indexing data from two different databases, but I can't add second 
database to indexing, can anyone help!  below is my dats-config.xml


<dataSource type="JdbcDataSource" name="ds-1" driver="org.postgresql.Driver" 
url="jdbc:mysql://XXX" user="XXX" password="XXX"/>

<dataSource type="JdbcDataSource" name="ds-2" driver="com.mysql.jdbc.Driver" 
url="jdbc:mysql://XXX" user="XXX" password="XXX"/>


<entity name="item" dataSource="ds-1" query="select * from item">

            <field column="ID" name="id" />

            <field column="NAME" name="name" />


            <entity name="factory" dataSource="ds-2" query="select description 
from feature where item_id='${item.ID}'">

                <field name="features" column="description" />

            </entity>



</entity>

my log indicate that '${item.ID}' is not catch any value from entity item.

Thanks,

Joe Moore