Vlad Mihalcea suggested of logging a ticket for this [SO|http://stackoverflow.com/questions/40257688/hibernate-querytranslatorimpl-hql-ast-parsing-performance #comment67816046_40260896 ]
If've noticed, the QueryPlanCache was not used, if executing Spring-data -jpa findAll method with an EntityGraph annotation.
I've added the EntityGraph annotations for performance reason's, but it turned out a performance loss: expensive HQL-Query parsing takes place every time the method is excuted.
{code:title=QueryImpl.java|borderStyle=solid}
private List<X> list() {
if (getEntityGraphQueryHint() != null) {
SessionImplementor sessionImpl = (SessionImplementor) getEntityManager().getSession();
HQLQueryPlan entityGraphQueryPlan = new HQLQueryPlan( getHibernateQuery().getQueryString(), false,
sessionImpl.getEnabledFilters(), sessionImpl.getFactory(), getEntityGraphQueryHint() );
// Safe to assume QueryImpl at this point.
unwrap( org.hibernate.internal.QueryImpl.class ).setQueryPlan( entityGraphQueryPlan );
}
return query.list();
}
{code}
A new HQLQueryPlan is created without checking the QueryPlanCache
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