apache / apache/arrow-rs

Support Continue on Error in CSV Reader

Open
#4,809 4 comments 0 reactions 0 assignees View on GitHub
enhancement
Dominant language
Rust
Stars
3.6k
Forks
1.3k
Avg merge
2d 18h
Merged PRs (30d)
169

Description

**Describe the bug**
Attempting to read malformed CSV records where the number of columns doesn't match the schema leads to an out-of-memory error.

**To Reproduce**
See minimal example Rust code below.

[arrow_bug.txt](https://github.com/apache/arrow-rs/files/12575141/arrow_bug.txt)

**Expected behavior**
The CSV reader should start re-start reading from the first newline/delimiter after the malformed row is encountered.

Contributor guide

Open the contributing guide

Research direction

Start with the minimal Rust reproduction in arrow_bug.txt and trace the CSV reader while processing a row whose column count does not match the schema. Confirm the malformed row can be skipped and reading resumes at the first newline or delimiter without an out-of-memory error.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
data-engineering
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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