[ROOT-10020] Add support to read variable/fixed size arrays in RRootDS Created: 06/Mar/19  Updated: 25/Mar/19

Status: Open
Project: ROOT
Component/s: I/O
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Medium
Reporter: Zhe Zhang Assignee: Zhe Zhang
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Bug / Feature: Feature request
Severity: 3 - Normal


RDataSource currently does not support reading fixed/variable size arrays from RRootDS. I am not sure how RDataSource reads fixed/variable size arrays from other sources like CSV, Arrow, etc. It would be nice to add this feature in RRootDS and allows RDataFrame to read arrays from RRootDS. 

Comment by Danilo Piparo [ 25/Mar/19 ]


the data source reads arrays as ROOT does and an idea could be to expose them as RVec instances. It should not be a big change.

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