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https://issues.apache.org/jira/browse/PARQUET-1951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17248721#comment-17248721
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ASF GitHub Bot commented on PARQUET-1951:
-----------------------------------------
satishkotha opened a new pull request #847:
URL: https://github.com/apache/parquet-mr/pull/847
…merging parquet files
### Jira
- [ X] My PR addresses the following [Parquet
Jira](https://issues.apache.org/jira/browse/PARQUET-1951) issues and references
them in the PR title.
### Tests
- [X ] My PR adds the following unit tests:
TestParquetFileWriter#testMergeMetadataWithNoConflictingKeyValues, and
testMergeMetadataWithConflictingKeyValues
### Commits
- [ X] My commits all reference Jira issues in their subject lines. In
addition, my commits follow the guidelines from "[How to write a good git
commit message](http://chris.beams.io/posts/git-commit/)":
1. Subject is separated from body by a blank line
1. Subject is limited to 50 characters (not including Jira issue reference)
1. Subject does not end with a period
1. Subject uses the imperative mood ("add", not "adding")
1. Body wraps at 72 characters
1. Body explains "what" and "why", not "how"
### Documentation
- [ X] In case of new functionality, my PR adds documentation that describes
how to use it.
- All the public functions and the classes in the PR contain Javadoc that
explain what it does
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> Allow different strategies to combine key values when merging parquet files
> ---------------------------------------------------------------------------
>
> Key: PARQUET-1951
> URL: https://issues.apache.org/jira/browse/PARQUET-1951
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-cli
> Reporter: satish
> Priority: Minor
>
> I work on Apache Hudi project. We store some additional metadata in parquet
> files (key range in the file, for example). So the metadata is different in
> different parquet files that we want to merge these files.
> Here is what I'm thinking:
> 1) Merge command takes additional command line option: --strategy
> <StrategyClassName>.
> 2) We introduce new strategy class in parquet-hadoop to keep the same
> behavior as today.
> We can extend that class and provide our custom implementation.
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