Adds fine-grained empty value preservation options#14
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Introduces two new configuration options to control how empty CSV values are handled in the parsed output: - `preserveEmptyColumnAsEmptyString`: Controls unquoted empty cells (e.g., `,,`) - `preserveEmptyString`: Controls explicitly quoted empty strings (e.g., `""`) By default, unquoted empties are omitted while quoted empties are preserved as empty strings. This allows users to differentiate between "no value provided" and "explicitly empty" in their CSV data. Implements a clear precedence chain: defaultValues > nullValues > preservation options > omit. Both parser implementations (string-based and stream-based) support these options consistently. The implementation uses internal provenance tracking to distinguish between quoted and unquoted empty values during parsing, ensuring accurate preservation behavior without breaking existing functionality.
IvoCerios
approved these changes
Apr 9, 2026
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Introduces two new configuration options to control how empty CSV values are handled in the parsed output:
preserveEmptyColumnAsEmptyString: Controls unquoted empty cells (e.g.,,,)preserveEmptyString: Controls explicitly quoted empty strings (e.g.,"")By default, unquoted empties are omitted while quoted empties are preserved as empty strings. This allows users to differentiate between "no value provided" and "explicitly empty" in their CSV data.
Implements a clear precedence chain: defaultValues > nullValues > preservation options > omit. Both parser implementations (string-based and stream-based) support these options consistently.
The implementation uses internal provenance tracking to distinguish between quoted and unquoted empty values during parsing, ensuring accurate preservation behavior without breaking existing functionality.