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Cast timestamp array to string array with timezone #2608

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merged 2 commits into from Sep 1, 2022

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viirya
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@viirya viirya commented Aug 30, 2022

Which issue does this PR close?

Closes #2607.

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 Aug 30, 2022
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viirya commented Aug 30, 2022

cc @sunchao

@viirya viirya force-pushed the fix_cast_timestamp_to_string branch from 6857794 to 1aac86a Compare August 30, 2022 06:36
@viirya viirya force-pushed the fix_cast_timestamp_to_string branch from 1aac86a to 9d1594a Compare August 30, 2022 06:52
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viirya commented Aug 31, 2022

cc @sunchao

arrow/src/compute/kernels/cast.rs Show resolved Hide resolved
arrow/src/compute/kernels/mod.rs Outdated Show resolved Hide resolved
@@ -28,33 +28,33 @@ use chrono::format::{parse, Parsed};
use chrono::FixedOffset;

macro_rules! extract_component_from_array {
($array:ident, $builder:ident, $extract_fn:ident, $using:ident) => {
($array:ident, $builder:ident, $extract_fn:ident, $using:ident, $convert:expr) => {
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why we need the $convert?

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The result type of hour etc is Int32Array, but these APIs of Timelike (hour, minute, second etc) return u32. Previously in this macro, it is hardcoded as something like dt.$extract_fn() as i32. But for to_string API that is called for cast kernel, we don't need any conversion. In order to reuse this macro, I add this $convert to extract as i32 part.

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LGTM

@viirya viirya merged commit 12ad8d7 into apache:master Sep 1, 2022
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ursabot commented Sep 1, 2022

Benchmark runs are scheduled for baseline = f9a3094 and contender = 12ad8d7. 12ad8d7 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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Casting timestamp array to string should not ignore timezone
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