If I have zabbix trap for some action (i.e. daily dump of mysql database) with exitcode of that action as trap value, then I cannot configure trigger with alarm on "no successful dumps last N days". I can only create trigger "no traps received last N days" (using "nodata()") and "all dumps last N days were unsuccessful" (this trigger will fall to unknown state if no traps received during this period).
On expression

>0 |

>0
we may not check second expression if first one is true, and assume value for this trigger to "true" if there was no data last 600 seconds.
Then, on expression "a & b" we do not need to evaluate "b" if "a" is false.
Is it possible to implement such logic in zabbix?