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Helper IV
Helper IV

REST API Dax query vs. XMLA

We've already implemented pulling data from Power BI Datasets using XMLA/ADOMD.

We fill a dataset and then serialize to Json.

Is there any reason to look at doing this via the new API vs. this method?



Community Support
Community Support

Hi @jprdynamicapps ,


The new DAX REST API avoids dependencies on Analysis Services client libraries, requires no connection to XMLA endpoints, and works in Power BI Premium as well as in Power BI shared capacity. In short, there are many good reasons for BI solution developers to evaluate this REST API during the public preview period.

There is a limit of 100,000 rows on this API.OLAP models are built for aggregation type queries, not large volume granular queries which are more suited for relational databases.

For more details,please refer to:


Best Regards,
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Thanks, Liang. 
I definitely understand why it's attractive. Just wondering if we should switch our current implementation. Should performance be any different?


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