select = conn.prepareStatement(selectSql);
select.setBytes(1, key.get());
results = select.executeQuery();
while(results.next()) {
VectorClock version = new VectorClock(results.getBytes("version_"));
Occurred occurred = value.getVersion().compare(version);
if(occurred == Occurred.BEFORE)
throw new ObsoleteVersionException("Attempt to put version "
+ value.getVersion()
+ " which is superceeded by " + version
+ ".");