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Get the round result for decimal to a decimal with smaller scale #3224

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tustvold merged 7 commits into
apache:masterfrom
liukun4515:decimal_round_#3137_with_false
Dec 3, 2022
Merged

Get the round result for decimal to a decimal with smaller scale #3224
tustvold merged 7 commits into
apache:masterfrom
liukun4515:decimal_round_#3137_with_false

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@liukun4515

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Which issue does this PR close?

#3139 just fix the Safe is true, and in this I miss the Safe is false.

  1. follow-up Cast: should get the round result for decimal to a decimal with smaller scale #3139

  2. change the ut and enhancement the macro generate_cast_test_case to add case with Safe is false.

Closes #3137

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

@github-actions github-actions Bot added the arrow Changes to the arrow crate label Nov 29, 2022
Comment thread arrow-cast/src/cast.rs Outdated
v.checked_div(div).ok_or_else(|| {
// cast to smaller scale, need to round the result
// the div must be gt_eq 10, we don't need to check the overflow for the `div`/`mod` operation
let d = v / div;

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Do we need to make consistent with the usage and clear compilation result?

Comment thread arrow-cast/src/cast.rs
}
}

let cast_option = CastOptions { safe: false };

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add cast with safe is false

@liukun4515 liukun4515 force-pushed the decimal_round_#3137_with_false branch from 31586e9 to 7ee48e2 Compare December 1, 2022 03:43
@tustvold tustvold merged commit cb4170b into apache:master Dec 3, 2022
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ursabot commented Dec 3, 2022

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Benchmark runs are scheduled for baseline = bcfbd46 and contender = cb4170b. cb4170b 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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Should be the rounding vs truncation when cast decimal to smaller scale

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