The "Bin" in the filename typically refers to the binary distribution, specifically mysql-connector-java-5.1.7-bin.jar . Key Features (at release)
Supports auto-loading of the driver class via the java.sql.Driver service provider mechanism. Mysql Connector Java 5.1.7 Bin
In its prime, it was highly regarded for being a "pure Java" implementation, meaning it didn't require native MySQL client libraries to function. The "Bin" in the filename typically refers to
Fixed issues where table aliases were not correctly returned in ResultSetMetaData . Critical Considerations Working With the PIX/PDQ Manager - Oracle Help Center Mysql Connector Java 5.1.7 Bin