presto-main/src/main/java/io/prestosql/type/DoubleOperators.java/DoubleOperators/hashCode
class DoubleOperators:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType(StandardTypes.DOUBLE) double value)
    {
        return AbstractLongType.hash(doubleToLongBits(value));
    }