No it doesn't. Why would relationships matter? You handle the relationships in SQL queries, and just copy query results to structs.
Congratulations, you've invented an ORM.
An ORM library maps an entire relational database to a graph of objects, with the intention of abstracting away the relational database. Copying query results to structs doesn't actually do any of that.
https://en.m.wikipedia.org/wiki/Object%E2%80%93relational_ma...
But then it's nice to have something that generates optimised, database-specific SQL, can handle date/number conversion, supports many-many relationships, converting BLOB to binary streams etc.
Source: Wrote an ORM that other people actually use. Still adding features, twelve years later.