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Fuse the SerializeFromObject / MapElements / DeserializeToObject sandwich into a Comet projection instead of falling back
area:expressionsExpression evaluationExpression evaluationenhancementNew feature or requestNew feature or requestStatus: Open.#5710 In apache/datafusion-comet;[EPIC] DataFusion 55 upgrade follow-ups
enhancementNew feature or requestNew feature or requestStatus: Open.#5709 In apache/datafusion-comet;Slice arrays before normalizing to avoid allocating over the whole backing buffer
area:expressionsExpression evaluationExpression evaluationenhancementNew feature or requestNew feature or requestpriority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken featuresStatus: Open.#5708 In apache/datafusion-comet;Nested Parquet cast retention accepts an ambiguous case-insensitive field match
area:scanParquet scan / data readingParquet scan / data readingbugSomething isn't workingSomething isn't workingpriority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken featuresStatus: Open.#5707 In apache/datafusion-comet;copy_array panics on offset overflow instead of returning an error
area:ffiArrow FFI / JNI boundaryArrow FFI / JNI boundarybugSomething isn't workingSomething isn't workingpriority:lowMinor issues, test failures, tooling, cosmeticMinor issues, test failures, tooling, cosmeticStatus: Open.#5706 In apache/datafusion-comet;SpillWriter::path() conflates "nothing spilled" with "backend has no local path"
area:shuffleShuffle (JVM and native)Shuffle (JVM and native)bugSomething isn't workingSomething isn't workingpriority:lowMinor issues, test failures, tooling, cosmeticMinor issues, test failures, tooling, cosmeticStatus: Open.#5705 In apache/datafusion-comet;Establish whether the DataFusion 55 TPC-H off-heap bump is real, and changelog it if so
area:aggregationHash aggregates, aggregate expressionsHash aggregates, aggregate expressionsenhancementNew feature or requestNew feature or requestpriority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken featuresStatus: Open.#5704 In apache/datafusion-comet;Re-enable the two ignored CometAggregateSuite metric tests after the DataFusion 55 peak_mem_used change
area:aggregationHash aggregates, aggregate expressionsHash aggregates, aggregate expressionspriority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken featurestestTesting relatedTesting relatedStatus: Open.#5703 In apache/datafusion-comet;Signed-zero array test fixtures claim the literal case agrees with Spark when it does not
area:expressionsExpression evaluationExpression evaluationpriority:lowMinor issues, test failures, tooling, cosmeticMinor issues, test failures, tooling, cosmetictestTesting relatedTesting relatedStatus: Open.#5702 In apache/datafusion-comet;array_distinct and array_union diverge from Spark on -0.0 for Spark versions without SPARK-54918
area:expressionsExpression evaluationExpression evaluationbugSomething isn't workingSomething isn't workingpriority:highCrashes, panics, segfaults, major functional breakageCrashes, panics, segfaults, major functional breakageStatus: Open.#5701 In apache/datafusion-comet;Native Iceberg writer raises a different exception than iceberg-java for unclustered input to a clustered writer
area:writerNative Parquet writerNative Parquet writerbugSomething isn't workingSomething isn't workingStatus: Open.#5698 In apache/datafusion-comet;Push native join runtime filters into scans to reduce I/O and decoding
enhancementNew feature or requestNew feature or requestStatus: Open.#5695 In apache/datafusion-comet;