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From Sam Groth <sgr...@yahoo-inc.com>
Subject Re: UUIDs in Avro Schemas
Date Wed, 23 Nov 2016 15:37:25 GMT
For UUIDs, I would probably use the fixed type, but a string would also work. See the specification
for the different types that avro supports: http://avro.apache.org/docs/current/spec.html

Sam 

    On Tuesday, November 22, 2016 6:32 PM, Tianxiang Xiong <tianxiang.xiong@fundingcircle.com>
wrote:
 

 I see, I'll close the ticket then if using logical types this way to specify UUID is idiomatic.
On 22 November 2016 at 16:21, Yibing Shi <yshi@cloudera.com> wrote:

Hi Tianxiang,
I am sorry! I replied too quickly!
I thought that you were complaining that you couldn't generate the UUID type with IDL compiler,
but when I check the JIRA you have just created, I find that you actually want to know how
to specify UUID type in JSON format, which has already been there. Please use below definition:
{
  "type": "string",
  "logicalType": "uuid"
}

Yibing Shi
Customer Operations Engineer

On Wed, Nov 23, 2016 at 10:43 AM, Tianxiang Xiong <tianxiang.xiong@ fundingcircle.com>
wrote:

Thanks Yibing, I have created AVRO-1962. Take a look and let me know if additional information/changes
are needed to the ticket.
On 22 November 2016 at 15:12, Yibing Shi <yshi@cloudera.com> wrote:

Hi Tianxiang,
Looks like that the UUID type hasn't been added to IDL definition yet.
https://github.com/apache/avro /blob/master/lang/java/compile r/src/main/javacc/org/apache/a
vro/compiler/idl/idl.jj#L214-L 244

Please create a JIRA to track this.
Yibing Shi
Customer Operations Engineer

On Wed, Nov 23, 2016 at 4:58 AM, Tianxiang Xiong <tianxiang.xiong@fundingcircle .com>
wrote:

The AVRO-1554 <https://issues.apache.org/jir a/browse/AVRO-1554> ticket
seems to suggest that the issue of representing UUIDs is resolved with logical
types <http://avro.apache.org/docs/1 .8.1/spec.html#Logical+Types> in Avro
1.8.1.

The specification offers several examples of using logical types; decimals
are represented as:

{

  "type": "bytes",
  "logicalType": "decimal",
  "precision": 4,
  "scale": 2
}

However, there does not seem to be an example of UUID. The most
popular answers <http://stackoverflow.com/a/19 705149/864684> via
Google/StackOverflow are a few years old and do not make use of
logical types, and can therefore be misleading for newer versions of
Avro

Is there an idiomatic way of representing UUIDs in Avro Schemas?

Thanks,

-- 
Tianxiang Xiong | Clojure Engineer tianxiang.xiong@fundingcircle. com747 Front Street, Floor
4 | San Francisco, CA 94111





-- 
Tianxiang Xiong | Clojure Engineer tianxiang.xiong@fundingcircle. com747 Front Street, Floor
4 | San Francisco, CA 94111





-- 
Tianxiang Xiong | Clojure Engineer tianxiang.xiong@fundingcircle.com747 Front Street, Floor
4 | San Francisco, CA 94111

   
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