Improve the returned data by taking into account the DATATYPE of the variables

[gndbc]

Currently, all the data seems to be returned as strings. To make use of the data, we have to convert one by one all the variables we want to use in Power BI.

The data that is returned by the connector should leverage the DATATYPE available in braincube and so:

• the DATETIME variables should be converted to be used as dates in Power BI
• the NUMERICAL variables should be converted to float in Power BI
• the CATEGORY variables should remain strings.

Thank you !