Standardizing char and varchar logical types

[Zoltan Ivanfi]

Hi,

Apparently, when saving char or varchar columns to Avro, Hive and Spark add
non-standard logical type annotations:

{"type":"string","logicalType":"char","maxLength":42}
{"type":"string","logicalType":"varchar","maxLength":42}

Considering that probably these two SQL engines are the creators of the
majority of all Avro files written so far, I was wondering whether we
should make these annotations official by adding them to the specification.

Any opinions?

Thanks,

Zoltan