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Combine multiple selections into the same batch size in skip_records #2359

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merged 2 commits into from Aug 8, 2022
Merged

Combine multiple selections into the same batch size in skip_records #2359

merged 2 commits into from Aug 8, 2022

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Ted-Jiang
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Which issue does this PR close?

Closes #2358 .

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

@github-actions github-actions bot added the parquet Changes to the parquet crate label Aug 8, 2022
Ted-Jiang
Ted-Jiang commented Aug 8, 2022
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parquet/src/arrow/record_reader/mod.rs
@@ -198,12 +198,6 @@ where
self.num_records += buffered_records;
self.num_values += buffered_values;

self.consume_def_levels();
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@tustvold FYI,
Sometimes like batch_size is = 20, when read 15 records without consume.
Then skip 50 records, finally read 5 records for one batch.
If we call these consume api during skip, we will lose the 15 records.

Do you think remove these is reasonable 🤔

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This makes sense to me

tustvold
tustvold approved these changes Aug 8, 2022
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Looking good, just some minor nits 👍

parquet/src/arrow/arrow_reader.rs Outdated Show resolved Hide resolved
parquet/src/arrow/arrow_reader.rs Outdated Show resolved Hide resolved
parquet/src/arrow/record_reader/mod.rs
@@ -198,12 +198,6 @@ where
self.num_records += buffered_records;
self.num_values += buffered_values;

self.consume_def_levels();
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This makes sense to me

@Ted-Jiang @tustvold
Apply suggestions from code review
fbc5274 
Co-authored-by: Raphael Taylor-Davies <1781103+tustvold@users.noreply.github.com>
@tustvold tustvold merged commit ce2bd1e into apache:master Aug 8, 2022
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ursabot commented Aug 8, 2022

Benchmark runs are scheduled for baseline = f3baeaa and contender = ce2bd1e. ce2bd1e 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

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@tustvold tustvold tustvold approved these changes

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Combine multiple selections into the same batch size in skip_records
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@Ted-Jiang @ursabot @tustvold