Function cql_db::read_value

pub fn read_value<TStore: CqlReadable>(
    db_location: &str, 
    location: &[u64]
) -> TStore::ValueType

Reads the value at the given location from the database.

Examples

let point = [2, 4, 3, 1];
let value = 5;

cql_db::create_db::<U64>(
    DATABASE_LOCATION,
    &[2, 5, 3, 2]
);

// higher order elements must be linked before they can be read from
cql_db::link_dimensions::<U64>(
    DATABASE_LOCATION,
    &point[0..3],
);

// Read the default value from point `point`
let result1 = cql_db::read_value::<U64>(
    DATABASE_LOCATION,
    &point
);

assert_eq!(0, result1);

// Write `value` to location `[2, 4, 3, 1]`
cql_db::write_value::<U64>(
    DATABASE_LOCATION,
    &point,
    value
);

// Read the now-populated value from point `point`
let result2 = cql_db::read_value::<U64>(
    DATABASE_LOCATION,
    &point
);

assert_eq!(value, result2);