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https://issues.apache.org/jira/browse/AVRO-1950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15642430#comment-15642430
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Ryan Blue commented on AVRO-1950:
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I've been thinking about this and I think maybe what we should do is to add an
encoding for Decimal that is a more natural fit for people using JSON. Right
now, you can store a decimal as bytes or fixed, but that doesn't work well as
you mentioned. But if we added a String type as well, then that would be suited
for JSON and wouldn't have a compatibility problem with implementations that
don't have logical types. This would require adding a String encoding for
decimal to the spec and toString / fromString methods to the DecimalConversion
class.
> Better Json serialization for Avro decimal logical types?
> ---------------------------------------------------------
>
> Key: AVRO-1950
> URL: https://issues.apache.org/jira/browse/AVRO-1950
> Project: Avro
> Issue Type: Improvement
> Reporter: Zoltan Farkas
> Priority: Minor
>
> Currently as I understand decimal logical types are encoded on top of bytes
> and fixed avro types. This makes them a bit "unnatural" in the json
> encoding...
> I worked around a hack in my fork to naturally encode them into json
> decimals. A good starting point to look at is in:
> https://github.com/zolyfarkas/avro/blob/trunk/lang/java/avro/src/main/java/org/apache/avro/io/DecimalEncoder.java
>
> My approach is a bit hacky, so I would be interested in suggestions to have
> this closer to something we can integrate into avro...
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