Add ParquetFileMerger for efficient row-group level file merging#14435

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shangxinli wants to merge 23 commits intoapache:mainfrom

shangxinli:rewrite_data_files2

Commits on Oct 29, 2025

Add ParquetFileMerger for efficient row-group level file merging
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Commits on Nov 4, 2025

Address feedbacks
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Commits on Nov 12, 2025

Address feedbacks for second round
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Commits on Nov 16, 2025

Address comments round 3
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Commits on Nov 17, 2025

Trigger CI
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Commits on Nov 24, 2025

Commits on Nov 26, 2025

Address feedback for another round
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Commits on Nov 27, 2025

Commits on Nov 28, 2025

Address feedback for another round
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Commits on Dec 3, 2025

Commits on Dec 5, 2025

Address review feedback: refactor ParquetFileMerger API and validation
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Commits on Dec 6, 2025

Refactor ParquetFileMerger API to return MessageType
shangxinli
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Commits on Dec 9, 2025

Address review feedback: optimize validation and file I/O
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Commits on Dec 21, 2025

Commits on Dec 28, 2025

Inline ParquetFileReader in try-with-resources block
shangxinli
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Commits on Jan 7, 2026

Address pvary's review comments on ParquetFileMerger PR
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Commits on Jan 25, 2026

Address reviewer comments on ParquetFileMerger PR
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Trigger CI re-run
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