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Add simplification rules for the CONCAT function #3684

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Merged
merged 4 commits into from
Oct 11, 2022
Merged

Add simplification rules for the CONCAT function #3684

merged 4 commits into from
Oct 11, 2022

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@HaoYang670
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@HaoYang670 HaoYang670 commented Oct 3, 2022 •
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Signed-off-by: remzi 13716567376yh@gmail.com

Which issue does this PR close?

Closes #3683 .

Rationale for this change

What changes are included in this PR?

  1. cast all scalar values to utf8
  2. drop null values
  3. concatenate contiguous scalar values

Are there any user-facing changes?

@HaoYang670
simpl concat
1eba34e 
Signed-off-by: remzi <13716567376yh@gmail.com>
@github-actions github-actions bot added the optimizer Optimizer rules label Oct 3, 2022
HaoYang670
HaoYang670 commented Oct 3, 2022
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@alamb alamb changed the title Simplify the CONCAT function Add simplification rules for the CONCAT function Oct 3, 2022
alamb
alamb reviewed Oct 4, 2022
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@HaoYang670 HaoYang670 marked this pull request as draft October 5, 2022 03:44
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HaoYang670 commented Oct 5, 2022

Mark the PR as a draft because the type-coercion rule for concat hasn't been added yet.

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HaoYang670 commented Oct 5, 2022

File #3720 to add type coercion rule.

@HaoYang670 HaoYang670 marked this pull request as ready for review October 9, 2022 09:58
@HaoYang670 HaoYang670 requested a review from alamb October 10, 2022 01:01
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alamb approved these changes Oct 11, 2022
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This is great -- thanks @HaoYang670

datafusion/optimizer/src/simplify_expressions.rs
lit(""),
null,
]);
let expected = build_concat_expr(&[col("c0"), lit("hello rust"), col("c1")]);
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@alamb alamb Oct 11, 2022

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this is very clever

@alamb alamb merged commit ac1631a into apache:master Oct 11, 2022
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ursabot commented Oct 11, 2022

Benchmark runs are scheduled for baseline = 0cf5630 and contender = ac1631a. ac1631a 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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Concatenate contiguous literal arguments of CONCAT during the expression simplification.

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@HaoYang670 @ursabot @alamb