Pig Predicate Pushdown using Filter2 API

[asfimport]

Use the pushdown API from Pig to build filter predicates for parquet. See PIG-3760.

Reporter: Daniel Weeks / @danielcweeks
Assignee: Daniel Weeks / @danielcweeks

Related issues:

• Release Parquet-mr 1.9.0 (blocks)
• Predicate pushdown for Parquet (supercedes)

PRs and other links:

• PR #331

_{Note: This issue was originally created as PARQUET-397. Please see the migration documentation for further details.}

[asfimport]

Daniel Weeks / @danielcweeks:
#296

[asfimport]

Ryan Blue / @rdblue:
Merged #331.