All Connection types that are not databases are bufferized :
- RESTful API (web)
- Alpana Runtime Connections
- file-based Connections : Excel, CSV
Multi-Source is a special case : in a Multi-Source context, even database-based Connections are bufferized.
SQL Connection1 points to your “MESDB” database, and SQL Connection2 points to your “OTHER_DB” database.
You create DataSource1 by making a join between Table1 from Connection1 and Table2 from Connection2.
⇒ Your DataSource1 is a Multi-Source Data Source. It is bufferized.