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Add columns delegation issue

There is no delegation warning but below function (inside Gallery) is not calculating average on any item above 500... Any idea what is wrong or how this could be overcome?




Thank you very much in advance.

Super User II
Super User II


I believe that the problem is occuring at the level where your collection is being created.   Collect() and ClearCollect() are not delegatable functions so they are limited to a maximum of 2000 items.   You need to go to File>Settings>Advanced Settings>Data row limit and increase it from 500 to 2000.  The reason you are not seeing any warnings is that when you use a collection as the datasource, there are no delegation issues.

Community Support
Community Support

Hi @aro1 :

Firstly,could you tell me what your data source is?

Generally, the data sources that can be delegated include: SharePoint\CDS\SQl Sever.

Secondly,The output of AddColumns(……) is subject to the non-delegation record limit. In this example, only 500 records are returned even if the TaskNames data source has 501 or more records.

I think this link will help you a lot:

The only way I can think of is to adjust the value of Data row limit for non-delegable queries to 2000.(As @Drrickryp  said)

file-Settings-Advanced settings


Finally,If the number of records is greater than 2000.The data source can be segmented and saved in batches to a collection.(The data source must be delegateable)

I assume TaskNames is a SharePoint list and "Kind" is one of the text type fields

For example:

1\Set the app's OnStart proeprty to:




2\Try this code




Best Regards,



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