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Merged
merged 2 commits into from
Jul 22, 2025
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Krmjn09
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@Krmjn09 Krmjn09 commented Jul 21, 2025

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@Krmjn09 Krmjn09 changed the base branch from master to dev July 21, 2025 12:18
@Krmjn09 Krmjn09 requested review from silverweed and linev July 21, 2025 12:19
@@ -4,7 +4,7 @@ import { TSelector, openFile } from 'jsroot';
const selector = new TSelector();
selector.sum = 0;
selector.count = 0;

selector.addBranch('myDouble');
selector.Begin = function() {
console.log('Begin processing');
};
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I am getting the right result for the file called simple.root .ie
Screenshot 2025-07-21 174725

But when i am checking for the ntuple001_staff.root, I am getting very suspecious result for its fields , i.e very big numbers for field category either i am not using the correct file
Screenshot 2025-07-21 164730

If you have any other root file with the known fields please send me i will check my code for that file too

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Which branch are you querying in ntuple001_staff.root?

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@Krmjn09 Krmjn09 Jul 21, 2025

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Category and age I checked both but values are very large and in the end they are comming to be 0 (some last values)

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Maybe I am using corrupted version of ntuple001_staff.root file

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In theory that file is compressed and the integer values have column type SplitInt, which you cannot deserialize yet; in fact I would expect your program to throw an exception inside deserializePage()...

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Deserializing column with coltype: 19 (0x13)

Getting this value for Category which matches with this in the enum (kUInt32: 0x13),

Something is not going correct

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@silverweed silverweed Jul 21, 2025

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0x13 is actually kSplitInt32 (see table here). I think you assigned the wrong values to the constants.

Edit: I see, you took the values from the enum index in RNTupleUtil.hxx, but that's not the same values that they are encoded with on disk. You need to use the ones in the table above if you want it to work.

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Ok so just enum needs to be changed that can be done easily then ,
Thankyou very much for help

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Changed the constants value and now its working as expected
Below is the result of simple.root working fine and giving mean value
Screenshot 2025-07-21 203133

Next is the result of ntuple001_staff result and throwing the exception successfully
Screenshot 2025-07-21 203138

Then I also tried the code for another root file i created had splitReal value and that too throwing exception as required
Screenshot 2025-07-21 203143

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I think this pr can be merged @silverweed if you feel its correct and good to go!

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Thanks!

@silverweed silverweed merged commit 00d083c into root-project:dev Jul 22, 2025
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@Krmjn09 Krmjn09 deleted the feature/addBranch-code branch July 22, 2025 09:53
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2 participants