Update connection::query docs

src/types/connection/mod.rs

@@ -170,7 +170,9 @@ pub trait DataSource {
     >;
 }
 
-/// If you don't want to implement DataSource, you can also use this function to query data directly.
+/// Parses the parameters and executes the query.
+///
+/// If you don't want to implement `DataSource`, you can also use this function to query data directly.
 ///
 /// # Examples
 ///