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Add into_primitive_dict_builder to DictionaryArray #3715

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merged 2 commits into from
Mar 4, 2023

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viirya
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@viirya viirya commented Feb 14, 2023

Which issue does this PR close?

Part of #3710.

Rationale for this change

Similar to into_builder of PrimitiveArray, into_primitive_dict_builder is for cow support for DictionaryArray.

With this API, it is easy to add unary_dict_mut.

What changes are included in this PR?

Added into_primitive_dict_builder API to DictionaryArray for mutating its keys and values.

Are there any user-facing changes?

@github-actions github-actions bot added the arrow Changes to the arrow crate label Feb 14, 2023
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Makes sense to me. Thank you @viirya

let key_array = as_primitive_array::<K>(self.keys()).clone();
let value_array = as_primitive_array::<V>(self.values()).clone();

drop(self.data);
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is this needed to drop the ref counts to be able to call into_builder() without copying data (as self has a ref count)?

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Yea, this drops self ref count.

Comment on lines 1031 to 1033
match err {
Ok(_) => panic!("Should not get builder from cloned array"),
Err(returned) => {
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You could also write this like let returned = err.unwrap_err()

@viirya viirya force-pushed the into_primitive_dict_builder branch from fa623d7 to b8dbf61 Compare March 2, 2023 19:17
@viirya viirya merged commit 72474a6 into apache:master Mar 4, 2023
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ursabot commented Mar 4, 2023

Benchmark runs are scheduled for baseline = e52574c and contender = 72474a6. 72474a6 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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3 participants