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Unstored calc to indexed field

Jim McKee
in Calculation Engine (Define Fields)

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I have a calculation in File1 based on the comparison of two related values in File2. So, the calc, which returns "1" or "", can't be indexed. I want to get the result into an indexable field in File1 whenever the calc changes.

I think I remember a discussion here about a way to automate this using modTime, a calc built on a Case() statement and a Lookup. But, for the life of me, I can't remember the setup, and I can't find the thread here.

Can someone point me to the thread or, if not, describe how to set this up? Or, maybe I'm dreaming? smile.gif

TIA

I think ir's here too in the article section.

Basic settings, which may differ from Ray, and hacked from Bob's is

serial

Mod Time (autoenter)

c_Trigger = (ModTime*0) + serial

RelTrigger --> c_Trigger::serial

Then, your field would lookup the unstored calculation based on the RelTrigger.

BUT this will only happen on a record by record basis, so you have to be on this record to have it happen...

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https://fmforums.com/topic/19994-unstored-calc-to-indexed-field/
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