Add SkipAdditionalFields codec option #300
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Introduces a new CodecOption.SkipAdditionalFields that allows decoding
textual Avro data with additional fields not defined in the schema.
When enabled, unknown fields are skipped instead of causing errors.
This is useful for schema evolution scenarios where newer data formats
may include fields that older schemas don't define. The option defaults
to false to maintain backward compatibility.
Changes:
- Add SkipAdditionalFields field to CodecOption
- Update genericMapTextDecoder to skip unknown fields when enabled
- Add advanceToNextValue helper to skip JSON values
- Thread option through record and union decoders
passuied
approved these changes
Jan 1, 2026
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@rockwotj could someone else review this PR? It is very useful IMHO |
rockwotj
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Jan 2, 2026
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rockwotj
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there is a bug around escaped quotes
| // Primarily used to handle edge cases where some Avro implementations allow string representations of null. | ||
| EnableStringNull bool | ||
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| // SkipAdditionalFields controls handling of additional fields during decoding. |
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This needs to mention it is for the textual format only.
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| var ( | ||
| valueBoundaries = map[byte]byte{ | ||
| '"': '"', |
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this doesn’t account for escaped quotes.
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and maybe not for nested object/arrays? It just stops at the first thing it sees
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Introduces a new
CodecOption.SkipAdditionalFieldsthat allows decoding textual Avro data with additional fields not defined in the schema. When enabled, unknown fields are skipped instead of causing errors.This is useful for schema evolution scenarios where newer data formats may include fields that older schemas don't define. The option defaults to
falseto maintain backward compatibility.Changes:
- Add
SkipAdditionalFieldsfield toCodecOption- Update
genericMapTextDecoderto skip unknown fields when enabled- Add
advanceToNextValuehelper to skip JSON valuesRelated to #294