Documentation on changes to Functions

[WAstarita]

It seems since the last update, Filter, Search and Lookup have had some backend changes.  Some of my working formulas are no longer working against a on-premise SQL server or the CDM.

Is there any documentation on this?

Edit: I have noticed any condition that evaluates against a variable gives the error that it cannot be evaluated due to service limitations.  For example

(Sql server)

Filter('dbo_Contacts', AccountNo = pAccountno (A context variable))  

CDM

Filter('Usermap', Email = User().Email)

[v-yamao-msft]

Hi WAstarita,

May I suggest you reset the formulas to see if the new formulas work?
Do you have Apps based on other connections? Such as SharePoint Online list, OneDrive, etc.. Do the formulas work on these Apps?

I have seen an article about Filter, Search, and LookUp functions in PowerApps, hope it can be a reference for you:
https://powerapps.microsoft.com/en-us/tutorials/function-filter-lookup/

Best regards,
Mabel Mao

[WAstarita]

I have reworked them but I still don't understand why and what they changes were.

[mr-dang · Accepted solution]

Confirmed: the backend on Filter has changed. I posted about this a few days ago.

The call to service can't handle certain things like referencing a variable--look for blue caution icons. I was able to use a work-around in referencing a Textbox instead.

https://powerusers.microsoft.com/t5/PowerApps-Forum/Filter-CDM-service-limitation-delegation-in-2-0-...

It's inconvenient, but you do what you need to do.

[WAstarita]

That's how I got around it as well.  Their documentation needs to improve big time.  I know this is a preview product but if I'm going to pour resources and energies into deciding if it's a long-term solution, this doesn't help.