Data Engineering
Schema Evolution Reference
Search schema evolution concepts. Covers Avro and Protobuf evolution rules, backward/forward/full compatibility, Confluent Schema Registry, and breaking change classification.
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About this tool
Schema Evolution Reference
The Schema Evolution Reference covers Avro evolution rules, Protobuf evolution, backward/forward/full compatibility, Schema Registry configuration, and breaking change classification.
• Look up Avro backward compatibility rules before a schema change
• Reference Protobuf field number rules before adding a new message field
• Understand full compatibility before configuring a Schema Registry subject
• Classify whether a proposed schema change is breaking before merging
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FAQ
What does this tool tell you?
The Schema Evolution Reference covers Avro evolution rules, Protobuf evolution, backward/forward/full compatibility, Schema Registry configuration, and breaking change classification.
What affects the result most?
Backward compatible: new schema reads old data — add optional fields, don't remove/rename. Forward compatible: old schema reads new data — consumers must ignore unknown fields. Full compatibility: both — most restrictive, safest for streaming systems.
How should I use the result?
Use this tool to orient quickly to the concepts, field names, or values you are about to look up in a full specification or vendor documentation. It summarizes the common cases; the authoritative source remains whichever standard or vendor doc defines the values themselves.
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