Against each process instance I store N variableInstance values.  I need to 
query to retrieve the process instances, joining with multiple 
variableInstances (E.g  get me all process instances where they have a 
variableinstance of 'doctype=foo' and a variable instance of 'owner=bar').

This is possible with HQL and joins, however I need to use Hibernate Criteria 
to allow better dynamic search building.

Looking at the Hibernate mappings, ProcessInstance has a Map to 
VariableInstance.  However, VariableInstance has no reverse mapping to 
ProcessInstance, even though the table contains a FK to it.

Is this an oversight on the mappings or was there a reason for this?

If there is no valid reason not to have it then is it worth raising a JIRA (No 
JIRA for this is currently raised).

Thanks 

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