Hi Ingo,
you are talking about automatic scheama evolution of Streamer's
We in STAR, have made some ROOT I/O modifications and we have this schema evolution
working. Right now, we are testing it in RHIC data taking and production.
I hope in a month it will be tested enough, and we will propose it to
ROOT team. We have already discussed it with Rene.
Victor
Ingo Froehlich wrote:
>
> Hello,
>
> we added some data members in a class, but now we are not able to read the
> old root trees. The only hint I found in the digests is to add some lines
> in the streamer function like:
> if (R__v > 1) { R__b >> newdata;}
>
> But I think the streamer function is created automatically, so I have to
> add it after the creation of EventDict.cpp, each? Or is it possible to do
> this version management also automatically?
>
> Thanks for your help, Ingo
>
> --
> Ingo Froehlich, II. Physikalisches Institut, Universitaet Giessen
> Heinrich-Buff-Ring 16, D-35392 Giessen | Tel.: 0641 - 99 33250
> EMail: Ingo.Froehlich@exp2.physik.uni-giessen.de | Fax : 0641 - 99 33209
> Sekretariat II. Physik: 0641 - 99 33261 | :-)
--
Victor M. Perevoztchikov perev@bnl.gov perev@vxcern.cern.ch
Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000
tel office : 631-344-7894; fax 631-344-4206; home 631-345-2690
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