[Format] Encoding spec incorrect for DELTA_BYTE_ARRAY

[asfimport]

The spec says that DELTA_BYTE_ARRAY is only supported for BYTE_ARRAY, but in parquet-mr it has been allowed for FIXED_LEN_BYTE_ARRAY as well since 2015.

Reporter: Antoine Pitrou / @pitrou
Assignee: Antoine Pitrou / @pitrou

Related issues:

• Spec and parquet-mr disagree on DELTA_BYTE_ARRAY encoding (duplicates)
• Encoding issue with fixed length byte arrays (is caused by)

_{Note: This issue was originally created as PARQUET-2231. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
[~rok] @shanhuuang [~muthunagappan] @js8544 FYI

[asfimport]

Antoine Pitrou / @pitrou:
Closed by PR #189