Preview lets you sanity-check what Power BI will see — before you save the data source. There are two complementary previews:
- Entity preview — a sample of rows from one entity, including its filters and parameters.
- Selection preview — a tabular summary of every entity in the data source, with the fields and filter you’ve picked. Useful for sanity-checking a multi-service selection.
Preview always queries the back end live. It doesn’t save anything to the data source and doesn’t count against any quota. You can preview as often as you like.
Preview a single entity #
Inside the entity panel, select the eye icon next to the entity name (tooltip: Data preview). A dialog opens with paged rows from the SAP service.
Use the page navigation in the dialog footer to scroll through the sample. The values are read directly from the live SAP service and reflect any filter expression you have applied to the entity.
Preview the whole selection #
In the footer of the data source form, select Preview. A summary table lists every service, entity, filter, and property in the current selection. It’s the fastest way to spot an entity you’ve forgotten to filter, or fields you’ve selected without realising.
When preview is disabled #
The preview buttons disable until at least one property is selected. For parametrized entities, mandatory parameters must also be filled — see Use parametrized OData entities. The tooltip on the button explains the missing prerequisite.
