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https://issues.apache.org/jira/browse/AVRO-3570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17771759#comment-17771759
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Martin Tzvetanov Grigorov commented on AVRO-3570:
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The Rust SDK has been improved to support both ways with AVRO-3780
> Logical type with "fixed" type not interoperable
> ------------------------------------------------
>
> Key: AVRO-3570
> URL: https://issues.apache.org/jira/browse/AVRO-3570
> Project: Apache Avro
> Issue Type: Bug
> Components: csharp, doc, logical types, rust
> Affects Versions: 1.11.0
> Reporter: Kalle Niemitalo
> Priority: Major
>
> The Avro specification does not include examples on how to apply the
> "decimal" or "duration" logical type to a "fixed" type. The implementations
> disagree on what the correct JSON structure is.
> The C++, Java, Python, and Ruby libraries expect the properties of the
> "fixed" type to be in the same JSON object as the properties of the logical
> type:
> {code:JSON}
> {
> "type": "fixed",
> "name": "test.FixedDecimal",
> "size": 8,
> "logicalType": "decimal",
> "precision": 18,
> "scale": 4
> }
> {code}
> The C# and Rust libraries instead expect a nested JSON object for the "fixed"
> type:
> {code:JSON}
> {
> "type": {
> "type": "fixed",
> "name": "test.Fixed8",
> "size": 8
> },
> "logicalType": "decimal",
> "precision": 18,
> "scale": 4
> }
> {code}
> Schemas using types like this are then not interoperable between languages.
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