// generate a timestamp for the schema root
int timestamp = -1;
String makeTimestamp =
"INSERT INTO " + dbName + RelationTimesequence + "(" +
RelTimesequenceColStart + ", " +
RelTimesequenceColStop + ") VALUES(" + version.number() + " , -1)";
statement.execute(makeTimestamp, Statement.RETURN_GENERATED_KEYS);
ResultSet rs = statement.getGeneratedKeys();
if (rs.next()) {
timestamp = rs.getInt(1);
rs.close();