function last to compare string/text values

[Koral]

Hi there,
I would like to compare two text values with function last.
Is it possible? In manual it is clearly said that this function can be used on strings, but when I make a trigger like:

{host:item.last(0)}={host:item.last(0,3600)} or
{host:item.last(0)}={host:item.last(#10)}

I only get "Format error or unsupported operator. Exp: [01 January 2013 00:00:00]"
Can someone help?

I didn't want to make external script+sender to firstly reconfigure values I get and lastly send them.
I just need to compare two values (the change is for example on midnight, from 01 January 2013 00:00:00 to 02 January 2013 00:00:00
if after midnight that value does not change, than I have a problem.

zbx: 2.2.1

P.S. function change/abschange is not good in my case because they only compare newest and previous values.

[aib]

Hi Koral!

Sorry for silly question.

Do you show two different logical expression ?
Or it is one logical expression made from two parts and connected by OR condition?

Do you remember that in Zabbix logical operators looks different?
AND -> &
OR -> |

For example, I have a triggers which work:

{AMD-137:agent.ping.last(0)}={AMD-137:agent.ping.last(0,3600)}|
{AMD-137:agent.ping.last(0)}={AMD-137:agent.ping.last(#5)}

As you can see it has two parts connected by "|" (OR logical operator)

[Koral]

Hey,
the two expressions I have wrote above where two separate 'ideas' for achieving the same:

{host:item.last(0)}={host:item.last(0,3600)}
'newest value is equal to value 1 hour ago'

{host:item.last(0)}={host:item.last(#10)}
'newest value is equal to value 10-checks ago'

I just wanted to state, that both (little different) formulas wont work for string values.

[simonquentel]

Besides, it would be nice to have this option in the "calculated items", meaning you can reuse a text item from a host for another host item.

Simon