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Ramana Suvarapu updated AVRO-1360: ---------------------------------- Attachment: callstack.txt AVRO-RD.patch > C++ Resolving decoder is not working when reader schema has more fields than > writer schema > ------------------------------------------------------------------------------------------ > > Key: AVRO-1360 > URL: https://issues.apache.org/jira/browse/AVRO-1360 > Project: Avro > Issue Type: Bug > Components: c++ > Affects Versions: 1.7.4 > Reporter: Ramana Suvarapu > Assignee: Thiruvalluvan M. G. > Attachments: AVRO-1360-2.patch, AVRO-1360-3.patch, AVRO-1360.patch, > AVRO-RD.patch, callstack.txt, testreader, testreader-1, testreader.hh, > testwriter, testwriter-1, testwriter.hh > > > When reader schema has more number of fields than writer schema, C++ > implementation of resolving decoder is throwing exception "throwing exception > "Don't know how to handle excess fields for reader.” with out checking > whether fields are optional or fields have default values. > Attached are reader and writer schemas. Record in reader schema has 2 > additional fields than writer schema. One field is required field but it has > default value and another one is optional field (union of null and string). > Since one has default value and another is optional both reader and writer > schemas are supposed to be compatible. > > {"name": "defaultField", "type": "string", "default": "DEFAULT", > "declared":"true"}, > {"name": "optionalField", "type": ["string", "null"],"declared":"true"}, > > main() > { > avro::ValidSchema readerSchema = load("reader.json"); > avro::ValidSchema writerSchema = load("writer.json"); > avro::DecoderPtr d = avro::resolvingDecoder(writerSchema, > readerSchema,avro::binaryDecoder()); > } > > But when I tried to create resolving decoder, I am getting "Don't know how to > handle excess fields for reader.” But Java implementation works. > > Can you please let us know if there are any other limitations with c++ > implementation of ResolvingDecoder? We are planning to use it in our project > and we want to make sure it works as per avro specification. -- This message was sent by Atlassian JIRA (v6.1#6144)