<lib dir="${solr.install.dir:../../../..}/dist/" regex="postgresql-.*.jar" />

<requestHandler name="/dataimport" class="org.apache.solr.handler.dataimport.DataImportHandler">
  <lst name="defaults">
  <str name="config">solr-data-config.xml</str>
</lst>

<dataConfig>
 <dataSource  type="JdbcDataSource" driver="org.postgresql.Driver" url="jdbc:postgresql://localhost:5432/mydatabase" user="postgres" password="pass" />
   <document >
     <entity name="user" query="SELECT * from user">
    </entity>
   </document>
</dataConfig>

Sorry, no dataimport-handler defined!