Function query_related_rows 

pub fn query_related_rows(
    adapter: &dyn DatabaseOperations,
    config: &DbBackendConfig,
    schema: &AppSchema,
    query: RelatedRowsQuery<'_>,
) -> Result<Vec<Map<String, Value>>, DatabaseError>

Reads a bounded relationship set using the contract’s operand and result limits. Duplicate keys are removed before paging; no vendor query escapes the operation interface.