Details
-
Bug
-
Status: Open
-
Major
-
Resolution: Unresolved
-
None
-
None
-
None
Description
- Nullable fields in avro are of type union with one of the values being null.
- Fields with default values are optional ONLY while reading. Default values are
- meant for schema evolution where reader schema is different from writer schema.
- Please note here that even the fields with default values MUST be specified at
- the time of serialization.
* - Behavior on the consumption side:
- While reading, the fields that are not written will be filled with default values
- that are specified in the reader schema. Please note that this happens only when
- the field with default value is not present in writer schema but is present in
- reader schema.
* - Behavior on the producer side:
- All non-nullable avro fields should have values including fields with default values.
- Nullable fields need not be explicitly set as they are set at the time of serialization.
* - So, all nullable fields are optional fields on the producer side in Avro.
- {@link AvroTypeFactoryImpl} reflects the state of fields on the producer side.
* - Note: There could be cases where the producer might embed some fields, in which case
- a non-nullable field is considered optional.
Attachments
Issue Links
- links to
