Rdatatable / Rdatatable/data.table
[R-Forge #4649] fread files with more than 4 billion rows
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feature request
fread
longvec
- Dominant language
- R
- Stars
- 3.9k
- Forks
- 1.1k
- Avg merge
- 14h 4m
- Merged PRs (30d)
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Description
Submitted by: Roby Joehanes; Assigned to: Nobody; R-Forge link
I have a huge table with 4+ billion rows. fread has an integer overflow problem and only read about 73M rows.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the fread implementation and the R-Forge report linked in the issue, then trace how row counts are represented while reading a file. Reproduce the behavior with a table exceeding 4 billion rows and confirm that fread returns the complete row count without integer overflow.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data-engineering
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100