I&#39;m trying to adapt the StringVariablePersister presented in <a href="http://blog.athico.com/2009/09/drools-flow-variable-persistence.html">http://blog.athico.com/2009/09/drools-flow-variable-persistence.html</a><div><br>
</div><div><a href="http://blog.athico.com/2009/09/drools-flow-variable-persistence.html"></a>I can create process instances with variable &quot;color&quot;:<br><div><br></div><div><div>  private static WorkflowProcessInstance startProcess(StatefulKnowledgeSession ksession, String color) {</div>
<div>    Map&lt;String, Object&gt; vars = new HashMap&lt;String, Object&gt;();</div><div>    vars.put(&quot;color&quot;, color);</div><div>    WorkflowProcessInstance p1 = (WorkflowProcessInstance) ksession.startProcess(&quot;com.sample.ruleflow&quot;, vars);</div>
<div>    return p1;</div><div>  }</div><div><br></div><div>I can count them:</div><div><br></div><div>select </div><div><div>    count(*)</div><div>from </div><div>    ProcessInstanceInfo</div><div><br></div><div>However I&#39;m stymied as to counting process instances with a given color, as there appears to be no join column between ProcessInstanceInfo and VariableInstanceInfo.</div>
<div>Can such a query be written?</div><div><br></div><div>Thanks.</div><div><br></div><div><br></div><div><br></div></div></div></div>