Dear experts,
I have a question concerning RDataFrame snapshotting behaviour from a TChain.
Let’s say my pseudocode is :
TChain ch("tupleName");
for f in files :
ch.AddFile( f)
ROOT::RDataFrame df( ch)
df.Filter.Snapshot().
I see some weird behaviour when
file[0]
contains a TTree with tupleName and say 100 branches
and file[1] contains 100 + 4 branches.
For some reason the snapshot contains entries only from file[1].
Is that expected?
What is the procedure to ensure this to not happen, without having to “manyally” add aligned branches names for the 2 files?
Thanks
Renato
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