Statistic and Filter need a mechanism to get customized comparator from high layer user

As discussed in HIVE-10254, we might need a customized comparator from high layer user for generating statistic when writing and applying filter when reading.

The problem is that (use Decimal type in Hive as an example):
Decimal in Hive is mapped to Binary in Parquet. When using predicate and statistic to filter values, comparing Binary values in Parquet cannot reflect the correct relationship of Decimal values in Hive. This type mapping causes 2 problems:
1. When writing Decimal column, Binary.compareTo() is used to judge and set the column statistic (min, max). The generated statistic value is not correct from a Decimal perspective.
2. When reading with Predicate (also Filter), in which the expected Decimal value is converted to Binary type, Binary.compareTo() is used to compare the expected value and column statistic value. They are Binary perspective, and also the result is not right.

We could add an interface for customized comparator, and high level user like Hive provides the comparator to Parquet, since Hive knows how to decode the binary to Decimal and compare. Then Parquet could switch between customized and original comparison method.

**Reporter**: [Dong Chen](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=dongc) / @dongc
**Assignee**: [Dong Chen](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=dongc) / @dongc
#### Related issues:
- [Parquet PPD support DECIMAL](https://issues.apache.org/jira/browse/HIVE-10254) (blocks)

_{**Note**: *This issue was originally created as [PARQUET-281](https://issues.apache.org/jira/browse/PARQUET-281). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Bắt đầu bằng cách lần theo đường dẫn tạo thống kê cho thao tác ghi và đường dẫn so sánh predicate/filter cho thao tác đọc được mô tả trong issue, sử dụng HIVE-10254 cho hành vi của Decimal. Xác định nơi có thể cung cấp một comparator cấp cao mà không thay đổi hành vi so sánh hiện có. Được xem là hoàn thành khi phép so sánh tùy chỉnh sắp xếp đúng các giá trị Decimal trong cả thống kê và quá trình filtering.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.