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Add API to Retrieve Finished Writer from Parquet Writer #2498

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merged 3 commits into from Aug 18, 2022

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jiacai2050
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Which issue does this PR close?

Closes #2491

Rationale for this change

What changes are included in this PR?

Add into_inner in ArrowWriter and its underlying Writer.

Are there any user-facing changes?

Yes, a new API into_inner in ArrowWriter

@github-actions github-actions bot added the parquet Changes to the parquet crate label Aug 18, 2022
@@ -223,6 +223,11 @@ impl<W: Write> ArrowWriter<W> {
Ok(())
}

/// Returns the underlying writer.
pub fn into_inner(self) -> W {
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I think this should either call flush, or mention the need for this in the doc comment. What do you think?

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Thanks for reminding.

At first, I think caller should call flush before into_inner, but since this method consume ownership, so it' best we call flush inside it just like what close does.

@@ -306,6 +311,11 @@ impl<W: Write> SerializedFileWriter<W> {
Ok(())
}
}

/// Returns the underlying writer.
pub fn into_inner(self) -> W {
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I think this needs to call self.write_metadata like close does, otherwise the file will not have a footer

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Looks good to me, just some minor nits

parquet/src/arrow/arrow_writer/mod.rs Outdated Show resolved Hide resolved
parquet/src/file/writer.rs Outdated Show resolved Hide resolved
@tustvold tustvold changed the title add into_inner to take inner writer out Add API to Retrieve Finished Writer from Parquet Writer Aug 18, 2022
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I took the liberty of applying the doc changes, so that I can get this in for the next release

@tustvold tustvold merged commit f3afdd2 into apache:master Aug 18, 2022
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ursabot commented Aug 18, 2022

Benchmark runs are scheduled for baseline = 15f42b2 and contender = f3afdd2. f3afdd2 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

@jiacai2050 jiacai2050 deleted the feat-into-inner branch August 19, 2022 01:24
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Thanks for quick response.

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add into_inner method to ArrowWriter
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