Parquet stats can have awkwardly large values

[asfimport]

If a column is storing very large values, say 2-4 MB, then the page header's min and max values can also be this large.

Reporter: Ryan Blue / @rdblue
Assignee: Ryan Blue / @rdblue

Related issues:

• Release Parquet-mr 1.9.0 (blocks)
• Format: Add a flag when min/max are truncated (relates to)

PRs and other links:

• PR #275

_{Note: This issue was originally created as PARQUET-372. Please see the migration documentation for further details.}

[asfimport]

Ryan Blue / @rdblue:
Merged #275. Thanks for reviewing, @danielcweeks!