solr/contrib/dataimporthandler/src/test-files/dih/solr/collection1/conf/data-config-end-to-end.xml

<dataConfig>
  <dataSource name="hsqldb" driver="org.hsqldb.jdbcDriver" url="jdbc:hsqldb:mem:." />
  <document name="dih_end_to_end">
    <entity 
      name="People" 
      processor="SqlEntityProcessor"
      dataSource="hsqldb" 
      query="SELECT ID, NAME, COUNTRY_CODES FROM PEOPLE"
      transformer="RegexTransformer"
    >
      <field column="ID" name="id" />
      <field column="COUNTRY_CODE" sourceColName="COUNTRY_CODES" splitBy="," />
 
<!-- 
 Instead of using 'cachePk'/'cacheLookup' as done below, we could have done:
  where="CODE=People.COUNTRY_CODE"
--> 
      <entity 
        name="Countries"
        processor="SqlEntityProcessor"
        dataSource="hsqldb" 
        cacheImpl="SortedMapBackedCache"
        cacheKey="CODE"
        cacheLookup="People.COUNTRY_CODE"
        
        query="SELECT CODE, COUNTRY_NAME FROM COUNTRIES"
      >
        <field column="CODE" name="DO_NOT_INDEX" />
      </entity>
         
      <entity 
        name="Sports"
        processor="SqlEntityProcessor"
        dataSource="hsqldb"               
        query="SELECT PERSON_ID, SPORT_NAME FROM PEOPLE_SPORTS WHERE PERSON_ID=${People.ID}"
      />

    </entity>
  </document>
</dataConfig>