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Avro >> mail # user >> what's the efficiency difference between type: "string" and ["string", "null"]


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Re: what's the efficiency difference between type: "string" and ["string", "null"]
I think the specification is clear about that.

Unions
http://avro.apache.org/docs/1.7.6/spec.html

So there is an overhead but that may not be the main issue.

The issue might be more about defining a correct schema. If a field can be
null then all clients should handle the case when the field is indeed null.
That's a 'hygiene issue' (or data quality issue if your prefer), like with
a database schema.

Regards

Bertrand

Bertrand Dechoux
On Fri, Mar 14, 2014 at 9:15 AM, Fengyun RAO <[EMAIL PROTECTED]> wrote: