apache / apache/arrow-java

Support parquet write from Arrow record batch

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#735 4 則留言 1 個 reaction 已指派 0 人 在 GitHub 檢視
Type: enhancement
主要語言
Java
星號
94
分支
152
平均合併
3 天 16 小時
30 天內合併 PR
11

描述

### Describe the enhancement requested

I'm working on https://github.com/alibaba/fluss/issues/107 which enable convert Fluss arow structure data to Parquet directly but found the API missing in here.
Althogh [ARROW-11776](https://github.com/apache/arrow-java/commit/0318b07908f240a57f134e34b871786f6a168b6c) supports to write from ArrowReader to file, it read from the ArrowReader, write and close the file direclty. But it's in a very coarse-grained , we almost have no control about the writing. Sometime, we want to control when to close the written parquet. Also it requires `ArrowReader`, but if the arrow RecordBatch is read continuously from remote server . It's not easy to constuct a `ArrowReader`.
So, I think we may need to support the interface to write Arrow RecordBatch to Parquet via [virtual ::arrow::Status WriteRecordBatch(const ::arrow::RecordBatch& batch) = 0](https://github.com/apache/arrow/blob/c506b0806bd2b90410400d349a16bc4a5b1dd51c/cpp/src/parquet/arrow/writer.h#L125)
Just to as a show case, the api may look like:
```
public class ArrowBatchParquetWriter {
void write(RecordBatch recordbatch);
void close()
}
```

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研究方向

先檢視現有以 ArrowReader 為基礎的 Parquet 寫入路徑,以及提議的 ArrowBatchParquetWriter API。將其需求與 Arrow 的 WriteRecordBatch 介面和 RecordBatch 的使用方式進行比較。完成的標準是,呼叫端可以增量寫入多個記錄批次,並且不需要 ArrowReader 就能明確關閉 Parquet 輸出。

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評估

技術堆疊
java
領域
data-engineering
Issue 類型
功能
難度
5/5
預估耗時
一週以上
活躍度
停滯
描述清晰度
基本清楚
新手友好度
35/100

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