Do Data Sources in PowerApps auto refresh when fetching into a collection?

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Posted on by Community Power Pla... Microsoft Employee

Good day,

I'm working in PowerApps with my data source coming from SharePoint

The data is getting quite large, and for that I created a Collection to store the data for use in the application.

I do call a ClearCollect at certain intervals on the app when needing to fetch new data from the source

My question, do i need to do a "Refresh(datasource)" before the clear collect or will it automatically fetch the latest data?

Reason being, Refreshing data source consumes time and I would prefer to do without it

Unfortunately I use a sum which is critical for my app and HAVE to do it in a collection, too bad sum is not yet delegable in SharePoint

Thanks in advance

Luka

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Building Power Apps

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mdevaney 29,991 Moderator on at

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@Anonymous
REFRESH is not required before collecting the data: the latest information will be stored in the collection.

An example of when to use refresh is: your gallery is connected directly to a datasource and you want it to show the latest data.

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Community Power Pla... Microsoft Employee on at

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Thanks @mdevaney
You've just helped me improve the app efficiency by 30% by removing the Refresh(datasource) 😃

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mdevaney 29,991 Moderator on at

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@Anonymous

No problem at all: check my revised reponse above for an example where you would need to use REFRESH.

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Community Power Pla... Microsoft Employee on at

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Actually, i noticed that galleries are automatically refreshing and always fetching the latest data, which made me switch my gallery from collection to a live data source, and use delegation for filtering (startswith, =, etc)

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