Function register_md5_functions 

pub fn register_md5_functions(conn: &Connection) -> Result<()>

Register the md5 SQL function with the given SQLite connection. The function takes a single argument and returns the MD5 hash (blob) of that argument. The argument can be either a string or a blob. If the argument is NULL, the result is NULL.

Example

let db = Connection::open_in_memory()?;
register_md5_functions(&db)?;
let hash: Vec<u8> = db.query_row("SELECT md5('hello')", [], |r| r.get(0))?;
let expected = b"\x5d\x41\x40\x2a\xbc\x4b\x2a\x76\xb9\x71\x9d\x91\x10\x17\xc5\x92";
assert_eq!(hash, expected);