GH-50436: [Ruby] Add ArrowFormat::TimestampArray.new(unit, values)#50445
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Pull request overview
This PR improves the Ruby red-arrow-format API to make it easier to build Arrow timestamp arrays directly from Ruby values by allowing ArrowFormat::TimestampArray.new(unit, values) (via TimestampType.try_convert support), and adds a dedicated unit test for the new initialization behavior.
Changes:
- Add
TimestampType.try_convertsoTimestampArray.newcan accept a unit (and optionally[unit, time_zone]) and build the appropriateTimestampType. - Add
TimestampType#pack_templateso timestamp values can be packed into buffers like other primitive/temporal arrays. - Add a new
TestTimestampArraytest file covering initialization and equality behaviors.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| ruby/red-arrow-format/lib/arrow-format/type.rb | Adds conversion and packing support for TimestampType needed for TimestampArray.new(unit, values) to work. |
| ruby/red-arrow-format/test/test-timestamp-array.rb | Introduces unit tests for ArrowFormat::TimestampArray initialization and equality semantics. |
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| unit = value | ||
| TimestampType.new(unit, nil) | ||
| when Array | ||
| unit, time_zone = value | ||
| TimestampType.new(unit, time_zone) |
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| sub_test_case("#initialize") do | ||
| def test_no_null | ||
| values = [ | ||
| @timestamp_2019_11_17_15_09_11, | ||
| @timestamp_2025_12_16_05_33_58, | ||
| ] | ||
| assert_equal(values, | ||
| ArrowFormat::TimestampArray.new(:second, values).to_a) | ||
| end | ||
|
|
||
| def test_mixed | ||
| values = [ | ||
| @timestamp_2019_11_17_15_09_11, | ||
| nil, | ||
| @timestamp_2025_12_16_05_33_58, | ||
| ] | ||
| assert_equal(values, | ||
| ArrowFormat::TimestampArray.new(:second, values).to_a) | ||
| end | ||
| end |
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| assert_equal(values, | ||
| ArrowFormat::TimestampArray.new(:second, values).to_a) | ||
| end |
kou
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ArrowFormat::Timestamp.new(unit, values)ArrowFormat::TimestampArray.new(unit, values)
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| assert_equal(values, | ||
| ArrowFormat::TimestampArray.new(:second, values).to_a) | ||
| end |
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| def try_convert(value) | ||
| case value | ||
| when Symbol | ||
| unit = value | ||
| new(unit, nil) | ||
| when Array | ||
| unit, time_zone = value | ||
| new(unit, time_zone) | ||
| when self |
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| when ::Array | ||
| unit, time_zone = value | ||
| new(unit, time_zone) | ||
| when self |
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Rationale for this change
Building a timestamp Arrow array from Ruby objects is convenient.
What changes are included in this PR?
Accept
ArrowFormat::TimestampArray.new(unit, values).Are these changes tested?
Yes.
Are there any user-facing changes?
Yes.
ArrowFormat::TimestampArray.new(unit, values)#50436