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/xwik...

Yes. The API is not optimal, I agree, and it was not really improved along the years.

ha ha i never said that! If alias and field name, usable in hql query, are documented it doesn't matter :-) Thxs for ur help