Moritz Hoffmann created AVRO-3155:
-------------------------------------
Summary: Schema specification inconsistently describes default
value for types
Key: AVRO-3155
URL: https://issues.apache.org/jira/browse/AVRO-3155
Project: Apache Avro
Issue Type: Bug
Affects Versions: 1.10.2, 1.10.1, 1.10.0
Reporter: Moritz Hoffmann
The Avro schema describes that types have default values, which seems to be
inconsistent. Previously to 1.10, only fields had default values, but types did
not. Since 1.10, the documentation for the map type states:
For example, a map from string to long is declared with:
{code:java}
{
"type": "map",
"values" : "long",
"default": {}
}{code}
Notice that the type declaration now carries a default value.
The change was introduced with AVRO-2574. However, the parser currently
(1.10.x) does not accept default values on types, but only on fields. The spec
for the array type was modified in a similar fashion.
We encountered this problem when implementing Avro support for Materialize, see
[https://github.com/MaterializeInc/materialize/issues/6433] for a bug on our
end.
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