OpenJPA-407 has introduced a fix in OpenJPA related to Query SQL Caching.
However, its default value is true, hence some of the inheritance cases
doesn't work unless the property openjpa.jdbc.QuerySQLCache is set to false
in persistence.xml (see OPENJPA-660). Isn't this causing a regression?
Does it mean Query SQL Cache will not work with polymorphism? Is it a
limitation which needs to be documented or will it be fixed in coming
releases?
