improved event summary query
improved event summary query

PanDAWMS/panda-bigmon-core,Foorth/panda-bigmon-core,PanDAWMS/panda-bigmon-core,PanDAWMS/panda-bigmon-core,PanDAWMS/panda-bigmon-core,Foorth/panda-bigmon-core,Foorth/panda-bigmon-core