external check with item last value as a parameter

[ShyLionTmn]

Hi.
Zabbix 2.2

I've got several items like:

olt-01:onuMAC[EPON0/2:1]
olt-01:onuMAC[EPON0/2:2]
olt-01:onuMAC[EPON0/2:3]
and so on

i want external check to be performed with last value of these items.

i've configured item with key parameter as this:

client_login["{olt-01:onuMAC[EPON0/2:1]}.last(0)"]

but it runs script with parameter "

{olt-01:onuMAC[EPON0/2:1]}.last(0)

" without calculating item value.

What am i doing wrong?

[aib]

It's impossible to use the last result of one key as a parameter for different key.

Sorry

[ShyLionTmn]

Thanks. It seems i'll have to lookup key value in zabbix DB directly from script.

Like this:

select value from (history_str inner join items on items.itemid=history_str.itemid) inner join hosts on hosts.hostid=items.hostid where key_='onuMAC[EPON0/2:7]' and host='olt-01' order by clock desc limit 1;