code: public void clearAllQueryCaches()
      {
          MithraRuntimeCacheController[] controllers;
          synchronized (this)
          {
              controllers = new MithraRuntimeCacheController[this.runtimeCacheControllerSet.size()];
              Iterator<MithraRuntimeCacheController> setIterator = this.runtimeCacheControllerSet.iterator();
              for (int i=0; i<this.runtimeCacheControllerSet.size(); i++)
              {
                  controllers[i] = setIterator.next();
              }
          }
          for (MithraRuntimeCacheController controller : controllers)
          {
              controller.clearQueryCache();
          }
      }
docs: Clears all query caches. Note: During a transaction, Mithra allocates a special query cache, which will NOT be
  cleared by this method.