The Tableau Server Data Dictionary includes information about the tables and views in the "workgroup" PostgreSQL database of the Tableau Server repository. This database provides persistent storage for Tableau Server and is primarily intended to support that application. The Data Dictionary is not a complete description of all tables and fields in the database, and is provided for customers who want to query the database for information about usage on Tableau Server. Because the database and its contents are intended to support Tableau Server, the structure and contents may change without warning. This means any custom views you build from directly querying the database could break.
Open the Data Dictionary(Link opens in a new window) (new window).