有没有办法让SolR数据导入处理器从关系型数据库中获取元数据，并从Tika中获取相关文件内容？

<dataConfig>
  <dataSource type="JdbcDataSource" 
              driver="com.mysql.jdbc.Driver" 
              url="jdbc:mysql://localhost:3306/mydatabase" 
              user="myuser" 
              password="mypassword" />
  <document>
    <entity name="myentity" 
            query="SELECT id, title, content FROM mytable">
      <field column="id" name="id" />
      <field column="title" name="title" />
      <field column="content" name="content" />
    </entity>
  </document>
</dataConfig>

<field name="id" type="string" indexed="true" stored="true" />
<field name="title" type="text_general" indexed="true" stored="true" />
<field name="content" type="text_general" indexed="true" stored="true" />

http://localhost:8983/solr/mycore/dataimport?command=full-import

<requestHandler name="/update/extract" 
                class="solr.extraction.ExtractingRequestHandler">
  <lst name="defaults">
    <str name="lowernames">true</str>
    <str name="uprefix">ignored_</str>
    <str name="captureAttr">true</str>
    <str name="fmap.content">text</str>
  </lst>
</requestHandler>

curl http://localhost:8983/solr/mycore/update/extract -F "myfile=@myfile.pdf"