Which process is responsible for querying datasources in Tableau Prep Flow Authoring?

The Tableau Prep Flow Service is specifically designed to handle the querying of datasources during the flow authoring process in Tableau Prep. This service plays a crucial role in executing and managing the flow by orchestrating the data transformations and retrieving the necessary data from various sources. By utilizing this dedicated service, users can efficiently create, modify, and execute data preparation workflows, ensuring that they have the correct and up-to-date data for analysis.

The VizQL Server, on the other hand, is primarily responsible for translating the visualizations and queries created in Tableau Desktop into SQL queries to communicate with the backend database. This server is not specifically tasked with flow authoring. The Search and Browse functionality pertains to the user interface aspects that help users find content within Tableau but does not directly involve querying datasources. The Repository stores metadata and configuration information but is not responsible for executing or managing the queries within Tableau Prep. Thus, the Tableau Prep Flow Service stands out as the essential component focused on querying datasources in the context of flow authoring.