Mark Perris created AVRO-1714:
---------------------------------
Summary: Nullable Named Schema definition in IDL fails.
Key: AVRO-1714
URL: https://issues.apache.org/jira/browse/AVRO-1714
Project: Avro
Issue Type: Bug
Affects Versions: 1.7.6
Reporter: Mark Perris
According to Section 7.2 of the Avro IDL, named schemata may be treated as
primitive types.
As such, I believe it should be possible to create a nullable schema reference:
{code}
record coordinate {
string type;
}
record tweet {
union {null, coordinate} coordinate;
}
{code}
to accommodate
{code}
{
"coordinate":{
"type":"point"
}
}
{code} and {code}
{
"coordinate":null
}
{code}
however, any attempt to store data against that schema results in
{code}
Exception in thread "main" org.apache.avro.AvroTypeException: Unknown union
branch type
at org.apache.avro.io.JsonDecoder.readIndex(JsonDecoder.java:445)
at
org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:290)
at org.apache.avro.io.parsing.Parser.advance(Parser.java:88)
at
org.apache.avro.io.ResolvingDecoder.readIndex(ResolvingDecoder.java:267)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:155)
at
org.apache.avro.generic.GenericDatumReader.readField(GenericDatumReader.java:193)
at
org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:183)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:151)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
at org.apache.avro.tool.DataFileWriteTool.run(DataFileWriteTool.java:99)
at org.apache.avro.tool.Main.run(Main.java:85)
at org.apache.avro.tool.Main.main(Main.java:74)
{code}
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