Just set the TTL on a row

Question

Using Java, can I scan a Cassandra table and just update the TTL of a row? I don\'t want to change any data. I just want to scan Cassandra table and set TTL of a few rows.

Answer 1

You can't only update TTL of a row. You have to update or re-insert all the column.

You can select all the regular column and the primary keys column then update the regular columns with primary keys or re-insert using TTL in second

In Java you can calculate TTL in second from a date using below method.

public static long ttlFromDate(Date ttlDate) throws Exception {
    long ttl = (ttlDate.getTime() - System.currentTimeMillis()) / 1000;
    if (ttl < 1) {
        throw new Exception("Invalid ttl date");
    }
    return ttl;
}