Make ArrowRowGroupWriter Public and SerializedRowGroupWriter Send #4850
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This was referenced Sep 23, 2023
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tustvold
approved these changes
Sep 23, 2023
| @@ -273,7 +273,7 @@ impl ChunkReader for ArrowColumnChunk { | |||
| } | |||
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| /// A [`Read`] for an iterator of [`Bytes`] | |||
| struct ChainReader(Peekable<IntoIter<Bytes>>); | |||
| pub struct ChainReader(Peekable<IntoIter<Bytes>>); | |||
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I think we probably want to rename this to ArrowColumnChunkReader or something, as it will now be public
ryanaston
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to segmentio/arrow-rs
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Nov 6, 2023
…ache#4850) * changes in supported of async parallel parquet writer * rename ChainReader * cargo fmt
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Which issue does this PR close?
Enables apache/datafusion#7632
Related to #1718
Rationale for this change
While working on improving DataFusions async parallel parquet writer (draft pr: apache/datafusion#7632), some changes were needed at the arrow level. The DataFusion parallel writer writes separate partitions to different RowGroups in parallel and later concatenates them into one file. Using ArrowRowGroupWriter directly is more efficient for this use case than ArrowWriter and allows retaining column indexes/bloom filters.
What changes are included in this PR?
ArrowRowGroupWriterand related structs/methods are marked publicOnCloseRowGroupclosure is now required to beSendAre there any user-facing changes?
ArrowRowGroupWriter can now be used directly by downstream arrow users.