/** * INTERNAL: Execute the query. If there are cached results return those. This must override the * super to support result caching. * * @param aSession - the session in which the receiver will be executed. * @return An object or vector, the result of executing the query. * @exception DatabaseException - an error has occurred on the database */ public Object execute(AbstractSession session, AbstractRecord row) throws DatabaseException { if (shouldCacheQueryResults()) { if (getContainerPolicy().overridesRead()) { throw QueryException.cannotCacheCursorResultsOnQuery(this); } if (isPrepared()) { // only prepared queries can have cached results. Object results = getQueryResults(session, row, true); // Bug6138532 - if results are "cached no results", return null immediately if (results == InvalidObject.instance) { return null; } if (results != null) { return results; } } } return super.execute(session, row); }
/** * INTERNAL: Execute the query. If there are cached results return those. This must override the * super to support result caching. * * @param session - the session in which the receiver will be executed. * @return An object or vector, the result of executing the query. * @exception DatabaseException - an error has occurred on the database */ public Object execute(AbstractSession session, AbstractRecord row) throws DatabaseException { if (shouldCacheQueryResults()) { if (getContainerPolicy().overridesRead()) { throw QueryException.cannotCacheCursorResultsOnQuery(this); } if (shouldConformResultsInUnitOfWork()) { throw QueryException.cannotConformAndCacheQueryResults(this); } if (isPrepared()) { // only prepared queries can have cached results. Object queryResults = getQueryResults(session, row, true); if (queryResults != null) { if (QueryMonitor.shouldMonitor()) { QueryMonitor.incrementReadAllHits(this); } // bug6138532 - check for "cached no results" (InvalidObject singleton) in query // results, and return an empty container instance as configured if (queryResults == InvalidObject.instance) { return getContainerPolicy().containerInstance(0); } Collection results = (Collection) queryResults; if (session.isUnitOfWork()) { ContainerPolicy policy = getContainerPolicy(); Object resultCollection = policy.containerInstance(results.size()); Object iterator = policy.iteratorFor(results); while (policy.hasNext(iterator)) { Object result = ((UnitOfWorkImpl) session) .registerExistingObject(policy.next(iterator, session), this.descriptor); policy.addInto(result, resultCollection, session); } return resultCollection; } return results; } } } if (QueryMonitor.shouldMonitor()) { QueryMonitor.incrementReadAllMisses(this); } return super.execute(session, row); }