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Simplify multiplication by 0 and by null #3627

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merged 1 commit into from
Sep 28, 2022

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HaoYang670
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Signed-off-by: remzi 13716567376yh@gmail.com

Which issue does this PR close?

Closes #3626.

Rationale for this change

Please look at the issue.

What changes are included in this PR?

Add 2 simplification rules and tests

Are there any user-facing changes?

Signed-off-by: remzi <13716567376yh@gmail.com>
@github-actions github-actions bot added the optimizer Optimizer rules label Sep 27, 2022
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@alamb alamb left a comment

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looks great -- thank you @HaoYang670

| Expr::Literal(ScalarValue::UInt64(Some(0))) => true,
Expr::Literal(ScalarValue::Float32(Some(v))) if *v == 0. => true,
Expr::Literal(ScalarValue::Float64(Some(v))) if *v == 0. => true,
_ => false,
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I wonder if we can also support ScalarValue::Decimal?

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We could create a follow-up ticket to add Decimal.

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alamb commented Sep 28, 2022

Filed #3643 to track adding Decimal support

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ursabot commented Sep 28, 2022

Benchmark runs are scheduled for baseline = d1e3bd7 and contender = 41b59cf. 41b59cf 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-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-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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Simplify A * 0 and A * null.
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