Follow the instructions in the “Working with Data Sources” chapter in the TDV User Guide to define a data source. Generally, TDV-supported relational data sources are supported by Discovery. But some TDV-supported data sources are not supported by Discovery. See Supported and Unsupported Data Sources for more information.

When you define a data source, its metadata is introspected and stored in the TDV metadata repository. Discovery uses the metadata discovered during introspection to understand the structure and data definitions in the data source.

When you define a data source, you select the resources that you want to introspect and include in the data source definition. This process lets you limit the catalogs, schemas, and tables that are included and introspected at data source definition time. This is important for Discovery, because all resources must be indexed to be included in relationship discovery. Indexing can be time-consuming, so it is a good idea to deselect or filter out resources that you know are not needed.

Note: If you scheduled re-introspection for a data source that is used in a Discovery model, you need to reindex and rediscover relationships in that data source.

See these topics for more information about editing data sources in Discovery: