def conn_string(dsn):
    if dsn["driver"] == "mssql":
        return f"mssql+pyodbc://{dsn['user']}:{dsn['password']}@{dsn['server']}/{dsn['database']}?driver=SQL+Server+Native+Client+11.0"
    if dsn["driver"] == "mysql":
        return f"mysql+pymysql://{dsn['user']}:{dsn['password']}@{dsn['server']}/{dsn['database']}?charset=utf8mb4"
    return f"pyodbc://{dsn['user']}:{dsn['pass']}@{dsn['server']}/{dsn['database']}?driver={dsn['driver']}"


def bcp_conn_params(dsn):
    return f"-S {dsn['server']} -d {dsn['database']} -U {dsn['user']} -P {dsn['password']}"


def mysql_conn_params(dsn):
    return f"-h {dsn['server']} -D {dsn['database']} -u {dsn['user']} -p {dsn['password']}"