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https://issues.apache.org/jira/browse/AVRO-1402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13972981#comment-13972981
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Doug Cutting commented on AVRO-1402:
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Ryanb: I'd prefer that Decimal is not a nested subclass of LogicalType. That
way the pattern is that new logical types can be added by user code, without
creating a new Avro release. Also, Schema.java needs not be altered. A
LogicalType can be a factory for and tools that manipulate Schema instances.
The existing schema property mechanism can be used to implement these. If
another implementation adds a logical type that Java has not yet implemented
then no exceptions need be caught, since logical types are an optional layer
atop schemas.
Jarek, you seem to feel that other projects (e.g., Hive or Impala) will better
be able to make progress once a logical type specification is committed. If
that's the case then perhaps we should commit just the specification change now
and let implementations and uses proceed in parallel.
> Support for DECIMAL type
> ------------------------
>
> Key: AVRO-1402
> URL: https://issues.apache.org/jira/browse/AVRO-1402
> Project: Avro
> Issue Type: New Feature
> Affects Versions: 1.7.5
> Reporter: Mariano Dominguez
> Assignee: Tom White
> Priority: Minor
> Labels: Hive
> Fix For: 1.7.7
>
> Attachments: AVRO-1402-logical-type-spec-2.patch,
> AVRO-1402-logical-type-spec-3.patch, AVRO-1402-logical-type-spec-4.patch,
> AVRO-1402-logical-type-spec-5.patch, AVRO-1402-logical-type-spec-6.patch,
> AVRO-1402-logical-type-spec-7.patch, AVRO-1402-logical-type-spec.patch,
> AVRO-1402.patch, AVRO-1402.patch, AVRO-1402.patch, AVRO-1402.patch,
> UnixEpochRecordMapping.patch
>
>
> Currently, Avro does not seem to support a DECIMAL type or equivalent.
> http://avro.apache.org/docs/1.7.5/spec.html#schema_primitive
> Adding DECIMAL support would be particularly interesting when converting
> types from Avro to Hive, since DECIMAL is already a supported data type in
> Hive (0.11.0).
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