Function select_all 

pub fn select_all<Sql, Arg>(sql: &mut Sql)
where
    Sql: WriteSql<Arg>,

SELECT ALL

The select query will return all the candidate rows, including duplicates (database default).

Example

let mut sql: SqlCommand<Void> = SqlCommand::default();
select_all(&mut sql);

assert_eq!(sql.as_command(), "SELECT ALL");