Hello All,

As you probably know adding a Custom Fetch into an Editable Grid is not supported by CDS / Dynamics 365. In the old interface this functionality was available only through an unsupported implementation as seen below.

var gridControl = formContext.getControl(GRID_NAME);
var subGrid = window.parent.document.getElementById(GRID_NAME);
var rowCount = gridControl !== null ? gridControl.getGrid().getTotalRecordCount() : 0;

if (subGrid !== null) {

if (gridControl === null) {
setTimeout(function () { //Repeat call initial function for delayed loading of the grid }, 1000);
return;
}

if (subGrid == null || gridControl == null || rowCount == null) {
Xrm.Utility.alertDialog("Grid not found");
return;
}

subGrid["control"].SetParameter("fetchXml", fetchXML);
subGrid["control"].SetParameter("effectiveFetchXml", fetchXML);
subGrid["control"].SetParameter("fetchXmlForFilters", fetchXML);
//subGrid["control"].SetParameter("layoutXml", LayoutXml);
subGrid["control"].Refresh();
}

In the new interface the above solution does not work (which is to be expected as it is unsupported). There is a way to set it in JavaScript but the Grid does not support it and hence will ignore it, as seen below.

var gridControl = formContext.getControl(GRID_NAME);
gridControl.setFilterXml(fetchXML);
gridControl.refresh();

The official statement that it is currently unsupported can be found here:
https://github.com/MicrosoftDocs/dynamics-365-customer-engagement/issues/719

I would like to propose adding the ability the insert a Custom Fetch into the Editable Grid from the SDK as seen in my last example.