title: How to use deletedPkQuery
body: <p>I have a data-config.xml with 2 entity, like</p>
  
  <pre><code>&lt;entity name="full" PK="ID" ...&gt;
  ...
  &lt;/entity&gt;
  </code></pre>
  
  <p>and </p>
  
  <pre><code>&lt;entity name="delta_build" PK="ID" ...&gt;
  ...
  &lt;/entity&gt;
  </code></pre>
  
  <p>entity delta_build is for delta import, query is </p>
  
  <pre><code>?command=full-import&amp;entity=delta_build&amp;clean=false
  </code></pre>
  
  <p>and I want to using deletedPkQuery to delete index. So I have add those to entity "delta_build"</p>
  
  <pre><code>deltaQuery="select -1 as ID from dual"
  
  deltaImportQuery="select * from product where a.id='${dataimporter.delta.ID}' "
  
  deletedPKQuery="select product_id as ID from modified_product where gmt_create &amp;gt; to_date('${dataimporter.last_index_time}','yyyy-mm-dd hh24:mi:ss') and modification = 'deleted'" 
  </code></pre>
  
  <p>deltaQuery and deltaImportQuery is simply to avoid delta import any records, course delta import has been implement by full import. and I am just want using delta for delete index.</p>
  
  <p>But when I hit query</p>
  
  <pre><code>?command=delta-import
  </code></pre>
  
  <p>deltaQuery and deltaImportQuery can be found in log, and without deletedPKQuery. Is there any thing wrong in config file?</p>