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From "Sachin Goyal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AVRO-680) Allow for non-string keys
Date Thu, 21 Aug 2014 20:23:17 GMT

     [ https://issues.apache.org/jira/browse/AVRO-680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sachin Goyal updated AVRO-680:
------------------------------

    Attachment: avro_circular_refs6.patch

avro_circular_refs6.patch is created using 
{code}
lang/java/avro% svn diff src/
{code}

It eliminates the need to add an extra field per record and relies on the order of record-writing
and reading.

In this patch, there is an equals check at 3 places of the form:
{code:java}
schema.getFullName().equals(CircularRef.class.getName())
{code}

I think this could be improved by adding a boolean-property in the schema for CircularRef
or somehow comparing the class.
Comments are welcome.

> Allow for non-string keys
> -------------------------
>
>                 Key: AVRO-680
>                 URL: https://issues.apache.org/jira/browse/AVRO-680
>             Project: Avro
>          Issue Type: Improvement
>    Affects Versions: 1.7.6, 1.7.7
>            Reporter: Jeremy Hanna
>         Attachments: AVRO-680.patch, avro_circular_refs6.patch, isMap_Call_Hierarchy.png,
non_string_map_keys.zip, non_string_map_keys2.zip, non_string_map_keys3.zip, non_string_map_keys4.patch,
non_string_map_keys5.patch, non_string_map_keys6.patch, non_string_map_keys7.patch
>
>
> Based on an email thread back in April, Doug Cutting proposed a possible solution for
having non-string keys:
> Stu Hood wrote:
> > I can understand the reasoning behind AVRO-9, but now I need to look for an alternative
to a 'map' that will allow me to store an association of bytes keys to values.
> A map of Foo has the same binary format as an array of records, each
> with a string field and a Foo field.  So an application can use an array
> schema similar to this to represent map-like structures with, e.g.,
> non-string keys.
> Perhaps we could establish standard properties that indicate that a
> given array of records should be represented in a map-like way if
> possible?  E.g.,:
> {"type": "array", "isMap": true, "items": {"type":"record", ...}}
> Doug



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