srijithr03 opened a new pull request, #10903:
URL: https://github.com/apache/arrow-rs/pull/10903
## Which issue does this PR close?
Closes #10578.
## Rationale for this change
`arrow-csv` currently supports recovering rows with fewer fields than the
schema through `with_truncated_rows(true)`, but rows with more fields always
return an error.
This change adds an opt-in `ExtraFields::Ignore` mode that keeps the fields
defined by the schema and ignores trailing extra fields.
The default behavior remains `ExtraFields::Error`, preserving existing
behavior.
## What does this PR do?
- Add `ExtraFields::{Error, Ignore}` configuration.
- Add `ReaderBuilder::with_extra_fields()`.
- Limit CSV field-end storage to the expected fields for the current row.
- Ignore trailing fields when `ExtraFields::Ignore` is enabled.
- Add regression tests for extra fields, quoted fields, and chunk
boundaries.
## Tests
- `cargo fmt --all -- --check`
- `cargo test -p arrow-csv`
- `cargo clippy -p arrow-csv --all-targets --all-features -- -D warnings`
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