Hi, Paul, The largest positive value is generally used as the null value in the column files. However, the fact that a value is null is actually indicated by the mask file associated with the column. If you want to see exactly the default values are, you can take a look at the function ibis::tafel::append in src/tafel.cpp.
Hope this helps. John On 2/2/2011 9:50 AM, Paul Komkoff wrote: > On Wed, Feb 2, 2011 at 3:44 PM, K. John Wu<[email protected]> wrote: >> Hi, Paul, > > Hi, John. > >> FastBit does not have a plug-in mechanism for implementing compressing for >> column storage. You might be able to do this by deriving a new class from >> ibis::column. > > Thanks. I'm currently going through fileManager::getFile, and was > wondering, how null values are distinguished from zeros, for example, > for uint32 columns. > > _______________________________________________ FastBit-users mailing list [email protected] https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users
