DIH: Any way to make update on db table?

[Jay Hill]

Is it possible for the DataImportHandler to update records in the table it
is querying? For example, say I have a query like this in my entity:

query="select field1, field2, from someTable where hasBeenIndexed=false"

Is there a way I can mark each record processed by updating the
hasBeenIndexed field? Here's a config I tried:

<?xml version="1.0"?>
<dataConfig>
    <dataSource
       type="JdbcDataSource"
       driver="com.mysql.jdbc.Driver"
       url="jdbc:mysql://localhost:3306/solrhacks"
       user="user"
       password="pass"/>

  <document name="testingDIHupdate">
    <entity name="mainEntity"
            pk="id"
            query="select id, name from tableToIndex where
hasBeenIndexed=0">
      <field column="id" template="dihTestUpdate-${main.id}"/>
      <field column="name" name="name"/>

      <entity name="updateEntity"
              pk="id"
              query="update tableToIndex set hasBeenIndexed=1 where
id=${mainEntity.id}">
      </entity>
    </entity>
  </document>
</dataConfig>

It does update the first record, but then an Exception is thrown:
Aug 3, 2009 1:15:24 PM org.apache.solr.handler.dataimport.DocBuilder
buildDocument
SEVERE: Exception while processing: mainEntity document :
SolrInputDocument[{id=id(1.0)={1}, name=name(1.0)={John Jones}}]
org.apache.solr.handler.dataimport.DataImportHandlerException: Unable to
execute query: update tableToIndex set hasBeenIndexed=1 where id=1
Processing Document # 1
    at
org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:250)
    at
org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:207)
    at
org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:40)
    at
org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:58)
    at
org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:71)
    at
org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:237)
    at
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:344)
    at
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:370)
    at
org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:225)
    at
org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:167)
    at
org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:333)
    at
org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:393)
    at
org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:372)
Caused by: java.lang.NullPointerException
    at
org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:248)
    ... 12 more


-Jay