Anyway, how do you found default alias of table name then? By example the alias "act" in my hql string here "act.eventId" (I found it by chance in error log) #set($results= $xwiki.activitystream.searchEvents("act.eventId in ($ListIn)", false, 0, 0)) Here i suppose? https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi… Yes. The API is not optimal, I agree, and it was not really improved along the years.