Filter OData Feed URL to filter the Data from D365 Finance and OperationsURL at the source level

[Anonymous]

I have data from D365 F&O coming into a PowerBI report via a OData URL.
However the data coming in to the table has over 600,000+ records and increasing with every refresh. 
The number of records i need from this big table is only about 5000-10000 records. 
Hence I want to filter this table at the source level itself instead of bringing in all the records.
I found that by having a filter for the length of the important column [AccountDisplayValue] to be greater than 20 i can sharply reduce the data from 600,000+ to only 20,000 + rows. 
However when i input this into my source URL feed
"https://companyname.sandbox.dynamics.com/data/TableName?$filter=length(AccountDisplayValue) gt 16"
it does not work even though there is no syntax error in this source url.
Please Help.
My current refresh time goes to over 2 hours for this single table!

[vidyadutt]

Hi @Anonymous, did you find a solution to this problem? I'm in a similar situation and I couldn't find the correct resource on this topic - yet.

Regards, Vidyadutt