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Don't try to infer nullability in CSV reader#2860

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Dandandan merged 8 commits into
apache:masterfrom
Dandandan:infer_csv
Oct 13, 2022
Merged

Don't try to infer nullability in CSV reader#2860
Dandandan merged 8 commits into
apache:masterfrom
Dandandan:infer_csv

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@Dandandan

@Dandandan Dandandan commented Oct 12, 2022

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Which issue does this PR close?

Closes #2859

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

Yes, inference always returns null datatypes for inference

@github-actions github-actions Bot added the arrow Changes to the arrow crate label Oct 12, 2022
@Dandandan Dandandan changed the title Don't try to infer nulls in CSV reader Don't try to infer nullability in CSV reader Oct 12, 2022
@viirya

viirya commented Oct 12, 2022 •
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FYI. I'm going to fix these clippy errors (error: unclosed HTML tag) at #2862

alamb
alamb approved these changes Oct 12, 2022
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Looks good to me -- thanks @Dandandan

I think it would help to put an additional comment in the docstring of infer_reader_schema saying that the inferred schema will always have
nullable fields as it may be done on a sample of the data.

Comment thread arrow/src/csv/reader.rs
@Dandandan @alamb
Update arrow/src/csv/reader.rs
4bd9501 
Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
@Dandandan

Dandandan commented Oct 13, 2022

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Thanks @viirya @alamb for the reviews. I will merge it after everything is green.

@Dandandan Dandandan merged commit 1397fb4 into apache:master Oct 13, 2022
@ursabot

ursabot commented Oct 13, 2022

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Benchmark runs are scheduled for baseline = 65d5576 and contender = 1397fb4. 1397fb4 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

@alamb

alamb commented Oct 13, 2022

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🎉

@alamb alamb mentioned this pull request Oct 14, 2022
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Fedomn added a commit to Fedomn/sqlrs that referenced this pull request Dec 10, 2022
@Fedomn
chore: bump arrow-rs and not infer nulls in csv schema(apache/arrow-r…
25446cc 
…s#2860)

Signed-off-by: Fedomn <fedomn.ma@gmail.com>
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Don't try to infer nulls in CSV schema inference

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@Dandandan @viirya @ursabot @alamb