int col = 5; // col offset is always pre-incremented.
Long txnid = Long.parseLong(row[++col]); // col 6
Long rowid = Long.parseLong(row[++col]); // col 7
// matches VoltProcedure.getSeededRandomNumberGenerator()
Random prng = new Random(txnid);
SampleRecord valid = new SampleRecord(rowid, prng);
// col 8
Byte rowid_group = Byte.parseByte(row[++col]);
if (rowid_group != valid.rowid_group)
return error("rowid_group invalid", rowid_group, valid.rowid_group);