in flink-connector-cassandra/src/main/java/org/apache/flink/connector/cassandra/source/split/SplitsGenerator.java [191:198]
private BigInteger distance(BigInteger token1, BigInteger token2) {
// token2 > token1
if (token2.compareTo(token1) > 0) {
return token2.subtract(token1);
} else {
return token2.subtract(token1).add(partitioner.ringSize);
}
}