Having two items with value xy and trigger which tests if they are the same

[riBoon]

Hi,
I have a race condition in my trigger.
I have two items checking at defined schedule time getting a value which is the correct value for today. But we have to make sure they are the same.

So my trigger expression looks like:
last(item1)<>last(item2)

And what I get is a problem alert with duration 0s as the first item creates the problem (values differ), the second switches it to ok.

Is there an easy way to get this done?

[guntis_liepins]

What are these items ? What is their type? How do you get them from server?

[cyber]

I think you need a calculated item there... if you compare those values directly, as you have in exampe, it gets recalculated each time new value arrives for any of items...And that causes you those 0 lenght events... If you add 3rd item here, which by schedule compares those 2 values, it shoudl be more accurate. You can also configure a scheduler for items themselves (lets say exact 00 seconds of every minute) and calculated item in every 30th second every minute...

[riBoon]

Ok, wow. That's really a good idea. I thought to much in trigger those items directly but a calculated item is the answer for my problem, of course.
@guntis_liepins sorry for missing informations. I extract numbers of strings (with pre processing regex) and the number is the current date. So I compare two date numbers here like 260318 (26 is the year 2026)

So my actual calculated item looks like: last(//item_key1)/last(//item_key2) and if I get 1 it's ok. I didn't find a compare function for calculated items.