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19 | 19 |
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20 | 20 | # Changelog
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21 | 21 |
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| 22 | +## [15.0.0](https://github.com/apache/arrow-rs/tree/15.0.0) (2022-05-27) |
| 23 | + |
| 24 | +[Full Changelog](https://github.com/apache/arrow-rs/compare/14.0.0...15.0.0) |
| 25 | + |
| 26 | +**Breaking changes:** |
| 27 | + |
| 28 | +- Change `ArrayDataBuilder::null_bit_buffer` to accept `Option<Buffer>` rather than `Buffer` [\#1739](https://github.com/apache/arrow-rs/pull/1739) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 29 | +- Remove `null_count` from `ArrayData::try_new()` [\#1721](https://github.com/apache/arrow-rs/pull/1721) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 30 | +- Change parquet writers to use standard `std:io::Write` rather custom `ParquetWriter` trait \(\#1717\) \(\#1163\) [\#1719](https://github.com/apache/arrow-rs/pull/1719) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 31 | +- Add explicit column mask for selection in parquet: `ProjectionMask` \(\#1701\) [\#1716](https://github.com/apache/arrow-rs/pull/1716) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 32 | +- Add type\_ids in Union datatype [\#1703](https://github.com/apache/arrow-rs/pull/1703) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([viirya](https://github.com/viirya)) |
| 33 | +- Fix Parquet Reader's Arrow Schema Inference [\#1682](https://github.com/apache/arrow-rs/pull/1682) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([tustvold](https://github.com/tustvold)) |
| 34 | + |
| 35 | +**Implemented enhancements:** |
| 36 | + |
| 37 | +- Rename the `string` kernel to `concatenate_elements` [\#1747](https://github.com/apache/arrow-rs/issues/1747) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 38 | +- `ArrayDataBuilder::null_bit_buffer` should accept `Option<Buffer>` as input type [\#1737](https://github.com/apache/arrow-rs/issues/1737) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 39 | +- Fix schema comparison for non\_canonical\_map when running flight test [\#1730](https://github.com/apache/arrow-rs/issues/1730) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 40 | +- Add support in aggregate kernel for `BinaryArray` [\#1724](https://github.com/apache/arrow-rs/issues/1724) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 41 | +- Fix incorrect null\_count in `generate_unions_case` integration test [\#1712](https://github.com/apache/arrow-rs/issues/1712) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 42 | +- Keep type ids in Union datatype to follow Arrow spec and integrate with other implementations [\#1690](https://github.com/apache/arrow-rs/issues/1690) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 43 | +- Support Reading Alternative List Representations to Arrow From Parquet [\#1680](https://github.com/apache/arrow-rs/issues/1680) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 44 | +- Speed up the offsets checking [\#1675](https://github.com/apache/arrow-rs/issues/1675) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 45 | +- Separate Parquet -\> Arrow Schema Conversion From ArrayBuilder [\#1655](https://github.com/apache/arrow-rs/issues/1655) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 46 | +- Add `leaf_columns` argument to `ArrowReader::get_record_reader_by_columns` [\#1653](https://github.com/apache/arrow-rs/issues/1653) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 47 | +- Implement `string_concat` kernel [\#1540](https://github.com/apache/arrow-rs/issues/1540) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 48 | +- Improve Unit Test Coverage of ArrayReaderBuilder [\#1484](https://github.com/apache/arrow-rs/issues/1484) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 49 | + |
| 50 | +**Fixed bugs:** |
| 51 | + |
| 52 | +- Parquet write failure \(from record batches\) when data is nested two levels deep [\#1744](https://github.com/apache/arrow-rs/issues/1744) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 53 | +- IPC reader may break on projection [\#1735](https://github.com/apache/arrow-rs/issues/1735) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 54 | +- Latest nightly fails to build with feature simd [\#1734](https://github.com/apache/arrow-rs/issues/1734) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 55 | +- Trying to write parquet file in parallel results in corrupt file [\#1717](https://github.com/apache/arrow-rs/issues/1717) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 56 | +- Roundtrip failure when using DELTA\_BINARY\_PACKED [\#1708](https://github.com/apache/arrow-rs/issues/1708) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 57 | +- `ArrayData::try_new` cannot always return expected error. [\#1707](https://github.com/apache/arrow-rs/issues/1707) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 58 | +- "out of order projection is not supported" after Fix Parquet Arrow Schema Inference [\#1701](https://github.com/apache/arrow-rs/issues/1701) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 59 | +- Rust is not interoperability with C++ for IPC schemas with dictionaries [\#1694](https://github.com/apache/arrow-rs/issues/1694) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 60 | +- Incorrect Repeated Field Schema Inference [\#1681](https://github.com/apache/arrow-rs/issues/1681) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 61 | +- Parquet Treats Embedded Arrow Schema as Authoritative [\#1663](https://github.com/apache/arrow-rs/issues/1663) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 62 | +- parquet\_to\_arrow\_schema\_by\_columns Incorrectly Handles Nested Types [\#1654](https://github.com/apache/arrow-rs/issues/1654) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 63 | +- Inconsistent Arrow Schema When Projecting Nested Parquet File [\#1652](https://github.com/apache/arrow-rs/issues/1652) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 64 | +- StructArrayReader Cannot Handle Nested Lists [\#1651](https://github.com/apache/arrow-rs/issues/1651) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 65 | +- Bug \(`substring` kernel\): The null buffer is not aligned when `offset != 0` [\#1639](https://github.com/apache/arrow-rs/issues/1639) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] |
| 66 | + |
| 67 | +**Documentation updates:** |
| 68 | + |
| 69 | +- Parquet command line tool does not install "globally" [\#1710](https://github.com/apache/arrow-rs/issues/1710) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] |
| 70 | +- Improve integration test document to follow Arrow C++ repo CI [\#1742](https://github.com/apache/arrow-rs/pull/1742) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([viirya](https://github.com/viirya)) |
| 71 | + |
| 72 | +**Merged pull requests:** |
| 73 | + |
| 74 | +- Test for list array equality with different offsets [\#1756](https://github.com/apache/arrow-rs/pull/1756) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([alamb](https://github.com/alamb)) |
| 75 | +- Rename `string_concat` to `concat_elements_utf8` [\#1754](https://github.com/apache/arrow-rs/pull/1754) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([alamb](https://github.com/alamb)) |
| 76 | +- Rename the `string` kernel to `concat_elements`. [\#1752](https://github.com/apache/arrow-rs/pull/1752) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 77 | +- Support writing nested lists to parquet [\#1746](https://github.com/apache/arrow-rs/pull/1746) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 78 | +- Pin nightly version to bypass packed\_simd build error [\#1743](https://github.com/apache/arrow-rs/pull/1743) ([viirya](https://github.com/viirya)) |
| 79 | +- Fix projection in IPC reader [\#1736](https://github.com/apache/arrow-rs/pull/1736) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([iyupeng](https://github.com/iyupeng)) |
| 80 | +- `cargo install` installs not globally [\#1732](https://github.com/apache/arrow-rs/pull/1732) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([kazuk](https://github.com/kazuk)) |
| 81 | +- Fix schema comparison for non\_canonical\_map when running flight test [\#1731](https://github.com/apache/arrow-rs/pull/1731) ([viirya](https://github.com/viirya)) |
| 82 | +- Add `min_binary` and `max_binary` aggregate kernels [\#1725](https://github.com/apache/arrow-rs/pull/1725) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 83 | +- Fix parquet benchmarks [\#1723](https://github.com/apache/arrow-rs/pull/1723) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 84 | +- Fix BitReader::get\_batch zero extension \(\#1708\) [\#1722](https://github.com/apache/arrow-rs/pull/1722) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 85 | +- Implementation string concat [\#1720](https://github.com/apache/arrow-rs/pull/1720) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([Ismail-Maj](https://github.com/Ismail-Maj)) |
| 86 | +- Check the length of `null_bit_buffer` in `ArrayData::try_new()` [\#1714](https://github.com/apache/arrow-rs/pull/1714) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 87 | +- Fix incorrect null\_count in `generate_unions_case` integration test [\#1713](https://github.com/apache/arrow-rs/pull/1713) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([viirya](https://github.com/viirya)) |
| 88 | +- Fix: Null buffer accounts for `offset` in `substring` kernel. [\#1704](https://github.com/apache/arrow-rs/pull/1704) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 89 | +- Minor: Refine `OffsetSizeTrait` to extend `num::Integer` [\#1702](https://github.com/apache/arrow-rs/pull/1702) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 90 | +- Fix StructArrayReader handling nested lists \(\#1651\) [\#1700](https://github.com/apache/arrow-rs/pull/1700) [[parquet](https://github.com/apache/arrow-rs/labels/parquet)] ([tustvold](https://github.com/tustvold)) |
| 91 | +- Speed up the offsets checking [\#1684](https://github.com/apache/arrow-rs/pull/1684) [[arrow](https://github.com/apache/arrow-rs/labels/arrow)] ([HaoYang670](https://github.com/HaoYang670)) |
| 92 | + |
22 | 93 | ## [14.0.0](https://github.com/apache/arrow-rs/tree/14.0.0) (2022-05-13)
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23 | 94 |
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24 | 95 | [Full Changelog](https://github.com/apache/arrow-rs/compare/13.0.0...14.0.0)
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