Real time streaming data format - integer as float

Hi,

we're pushing some data through REST API to a real-time streaming dataset - there's also a date field among them. Unfortunately, I'm not able to use date hierarchy on visuals (line chart for example). 

So we decided to push separate fields with Year/Month/Day as integer data type. PowerBI shows it as float, so it looks strange, to have Year presented like this: 2017,00. After drill down to month level, it's quite OK - there's "correct" Year format and "Month" format (for example 2017 / 05 ).

This problem occurs only if I'm trying to create date hierarchy - in X-axis setting there's no option to change decimal numbers in such case.

Is there any way to change the data type in real-time streaming data? I tried to connect to this data source using Power BI Desktop, but I don't have access to those functions in this data source type. 

Any workarounds for that one?