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| <!-- | ||
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| # DataFusion Comet 0.3.0 Changelog | ||
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| This release consists of 57 commits from 12 contributors. See credits at the end of this changelog for more information. | ||
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| **Fixed bugs:** | ||
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| - fix: Support type coercion for ScalarUDFs [#865](https://github.com/apache/datafusion-comet/pull/865) (Kimahriman) | ||
| - fix: CometTakeOrderedAndProjectExec native scan node should use child operator's output [#896](https://github.com/apache/datafusion-comet/pull/896) (viirya) | ||
| - fix: Fix various memory leaks problems [#890](https://github.com/apache/datafusion-comet/pull/890) (Kontinuation) | ||
| - fix: Add output to Comet operators equal and hashCode [#902](https://github.com/apache/datafusion-comet/pull/902) (viirya) | ||
| - fix: Fallback to Spark when cannot resolve AttributeReference [#926](https://github.com/apache/datafusion-comet/pull/926) (viirya) | ||
| - fix: Fix memory bloat caused by holding too many unclosed `ArrowReaderIterator`s [#929](https://github.com/apache/datafusion-comet/pull/929) (Kontinuation) | ||
| - fix: Normalize NaN and zeros for floating number comparison [#953](https://github.com/apache/datafusion-comet/pull/953) (viirya) | ||
| - fix: window function range offset should be long instead of int [#733](https://github.com/apache/datafusion-comet/pull/733) (huaxingao) | ||
| - fix: CometScanExec on Spark 3.5.2 [#915](https://github.com/apache/datafusion-comet/pull/915) (Kimahriman) | ||
| - fix: div and rem by negative zero [#960](https://github.com/apache/datafusion-comet/pull/960) (kazuyukitanimura) | ||
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| **Performance related:** | ||
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| - perf: Optimize CometSparkToColumnar for columnar input [#892](https://github.com/apache/datafusion-comet/pull/892) (mbutrovich) | ||
| - perf: Fall back to Spark if query uses DPP with v1 data sources [#897](https://github.com/apache/datafusion-comet/pull/897) (andygrove) | ||
| - perf: Report accurate total time for scans [#916](https://github.com/apache/datafusion-comet/pull/916) (andygrove) | ||
| - perf: Add metric for time spent casting in native scan [#919](https://github.com/apache/datafusion-comet/pull/919) (andygrove) | ||
| - perf: Add criterion benchmark for aggregate expressions [#948](https://github.com/apache/datafusion-comet/pull/948) (andygrove) | ||
| - perf: Add metric for time spent in CometSparkToColumnarExec [#931](https://github.com/apache/datafusion-comet/pull/931) (mbutrovich) | ||
| - perf: Optimize decimal precision check in decimal aggregates (sum and avg) [#952](https://github.com/apache/datafusion-comet/pull/952) (andygrove) | ||
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| **Implemented enhancements:** | ||
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| - feat: Add config option to enable converting CSV to columnar [#871](https://github.com/apache/datafusion-comet/pull/871) (andygrove) | ||
| - feat: Implement basic version of string to float/double/decimal [#870](https://github.com/apache/datafusion-comet/pull/870) (andygrove) | ||
| - feat: Implement to_json for subset of types [#805](https://github.com/apache/datafusion-comet/pull/805) (andygrove) | ||
| - feat: Add ShuffleQueryStageExec to direct child node for CometBroadcastExchangeExec [#880](https://github.com/apache/datafusion-comet/pull/880) (viirya) | ||
| - feat: Support sort merge join with a join condition [#553](https://github.com/apache/datafusion-comet/pull/553) (viirya) | ||
| - feat: Array element extraction [#899](https://github.com/apache/datafusion-comet/pull/899) (Kimahriman) | ||
| - feat: date_add and date_sub functions [#910](https://github.com/apache/datafusion-comet/pull/910) (mbutrovich) | ||
| - feat: implement scripts for binary release build [#932](https://github.com/apache/datafusion-comet/pull/932) (parthchandra) | ||
| - feat: Publish artifacts to maven [#946](https://github.com/apache/datafusion-comet/pull/946) (parthchandra) | ||
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| **Documentation updates:** | ||
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| - doc: Documenting Helm chart for Comet Kube execution [#874](https://github.com/apache/datafusion-comet/pull/874) (comphead) | ||
| - doc: Update native code path in development [#921](https://github.com/apache/datafusion-comet/pull/921) (viirya) | ||
| - docs: Add more detailed architecture documentation [#922](https://github.com/apache/datafusion-comet/pull/922) (andygrove) | ||
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| **Other:** | ||
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| - chore: Update installation.md [#869](https://github.com/apache/datafusion-comet/pull/869) (haoxins) | ||
| - chore: Update versions to 0.3.0 / 0.3.0-SNAPSHOT [#868](https://github.com/apache/datafusion-comet/pull/868) (andygrove) | ||
| - chore: Add documentation on running benchmarks with Microk8s [#848](https://github.com/apache/datafusion-comet/pull/848) (andygrove) | ||
| - chore: Improve CometExchange metrics [#873](https://github.com/apache/datafusion-comet/pull/873) (viirya) | ||
| - chore: Add spilling metrics of SortMergeJoin [#878](https://github.com/apache/datafusion-comet/pull/878) (viirya) | ||
| - chore: change shuffle mode default from jvm to auto [#877](https://github.com/apache/datafusion-comet/pull/877) (andygrove) | ||
| - chore: Enable shuffle by default [#881](https://github.com/apache/datafusion-comet/pull/881) (andygrove) | ||
| - chore: print Comet native version to logs after Comet is initialized [#900](https://github.com/apache/datafusion-comet/pull/900) (SemyonSinchenko) | ||
| - chore: Revise batch pull approach to more follow C Data interface semantics [#893](https://github.com/apache/datafusion-comet/pull/893) (viirya) | ||
| - chore: Close dictionary provider when iterator is closed [#904](https://github.com/apache/datafusion-comet/pull/904) (andygrove) | ||
| - chore: Remove unused function [#906](https://github.com/apache/datafusion-comet/pull/906) (viirya) | ||
| - chore: Upgrade to latest DataFusion revision [#909](https://github.com/apache/datafusion-comet/pull/909) (andygrove) | ||
| - build: fix build [#917](https://github.com/apache/datafusion-comet/pull/917) (andygrove) | ||
| - chore: Revise array import to more follow C Data Interface semantics [#905](https://github.com/apache/datafusion-comet/pull/905) (viirya) | ||
| - chore: Address reviews [#920](https://github.com/apache/datafusion-comet/pull/920) (viirya) | ||
| - chore: Enable Comet shuffle for Spark core-1 test [#924](https://github.com/apache/datafusion-comet/pull/924) (viirya) | ||
| - build: Add maven-compiler-plugin for java cross-build [#911](https://github.com/apache/datafusion-comet/pull/911) (viirya) | ||
| - build: Disable upload-test-reports for macos-13 runner [#933](https://github.com/apache/datafusion-comet/pull/933) (viirya) | ||
| - minor: cast timestamp test #468 [#923](https://github.com/apache/datafusion-comet/pull/923) (himadripal) | ||
| - build: Set Java version arg for scala-maven-plugin [#934](https://github.com/apache/datafusion-comet/pull/934) (viirya) | ||
| - chore: Remove redundant RowToColumnar from CometShuffleExchangeExec for columnar shuffle [#944](https://github.com/apache/datafusion-comet/pull/944) (viirya) | ||
| - minor: rename CometMetricNode `add` to `set` and update documentation [#940](https://github.com/apache/datafusion-comet/pull/940) (andygrove) | ||
| - chore: Add config for enabling SMJ with join condition [#937](https://github.com/apache/datafusion-comet/pull/937) (andygrove) | ||
| - chore: Change maven group ID to `org.apache.datafusion` [#941](https://github.com/apache/datafusion-comet/pull/941) (andygrove) | ||
| - chore: Upgrade to DataFusion 42.0.0 [#945](https://github.com/apache/datafusion-comet/pull/945) (andygrove) | ||
| - build: Fix regression in jar packaging [#950](https://github.com/apache/datafusion-comet/pull/950) (andygrove) | ||
| - chore: Show reason for falling back to Spark when SMJ with join condition is not enabled [#956](https://github.com/apache/datafusion-comet/pull/956) (andygrove) | ||
| - chore: clarify tarball installation [#959](https://github.com/apache/datafusion-comet/pull/959) (comphead) | ||
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| ## Credits | ||
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| Thank you to everyone who contributed to this release. Here is a breakdown of commits (PRs merged) per contributor. | ||
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| ``` | ||
| 22 Andy Grove | ||
| 18 Liang-Chi Hsieh | ||
| 3 Adam Binford | ||
| 3 Matt Butrovich | ||
| 2 Kristin Cowalcijk | ||
| 2 Oleks V | ||
| 2 Parth Chandra | ||
| 1 Himadri Pal | ||
| 1 Huaxin Gao | ||
| 1 KAZUYUKI TANIMURA | ||
| 1 Semyon | ||
| 1 Xin Hao | ||
| ``` | ||
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| Thank you also to everyone who contributed in other ways such as filing issues, reviewing PRs, and providing feedback on this release. |