1.2.0

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•Last updated Oct 23, 2026

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Sort-aware Iceberg reads: per-partition streaming merge + report ordering and grouping (v1)
apache/datafusion-comet#5337 · opened on Aug 12, 2026 · 1.2.0
NegativeExpr::get_properties reports child ordering and range unchanged
apache/datafusion-comet#5330 · opened on Aug 11, 2026 · 1.2.0
1
size, arrays_zip, map_from_arrays and array_append return wrong answers for a nondeterministic child
apache/datafusion-comet#5781 · opened on Sep 8, 2026 · 1.2.0
4
Write blog post for 1.1.0 release
apache/datafusion-comet#6120 · opened on Sep 22, 2026 · 1.2.0
Comet 1.2.0 Release
apache/datafusion-comet#6550 · opened on Oct 2, 2026 · 1.2.0
2
My priorities for 1.2.0
apache/datafusion-comet#6580 · opened on Oct 3, 2026 · 1.2.0
Native map construction doesn't match Spark 4.0+ float key normalization (-0.0 keys, missing DUPLICATED_MAP_KEY)
apache/datafusion-comet#6549 · opened on Oct 2, 2026 · 1.2.0
Enable spark.comet.exec.localTableScan.enabled when running Spark SQL tests
apache/datafusion-comet#4347 · opened on May 15, 2026 · 1.2.0
1
feat(iceberg): native Iceberg scans of HDFS-backed tables via iceberg-rust's hdfs-native backend
Unread
#5898 opened Sep 13, 2026 · Updated Oct 24, 2026
11
Write blog post for 1.2.0 release
apache/datafusion-comet#6889 · opened on Oct 12, 2026 · 1.2.0
1
Native Iceberg scan returns wrong values for a column renamed after a VERSION AS OF snapshot
apache/datafusion-comet#6822 · opened on Oct 9, 2026 · 1.2.0
2
Native Iceberg scan returns nested values that Spark reads as NULL in files without field ids or a name mapping
apache/datafusion-comet#6794 · opened on Oct 8, 2026 · 1.2.0
2
Native Iceberg scan returns NULL for nested fields of migrated tables that use a name mapping
apache/datafusion-comet#6790 · opened on Oct 8, 2026 · 1.2.0
2
arrays_overlap returns wrong answers or panics with a constant array beside a column
apache/datafusion-comet#6742 · opened on Oct 7, 2026 · 1.2.0
[Bug] Native make_interval overflows valid time components or loses seconds precision
apache/datafusion-comet#5131 · opened on Jul 29, 2026 · 1.2.0
Register CometArrowAllocator as a Spark MemoryConsumer for JVM-UDF dispatch
apache/datafusion-comet#4174 · opened on May 1, 2026 · 1.2.0
1
[Bug] map_from_arrays / map_from_entries do not enforce null-key rejection or spark.sql.mapKeyDedupPolicy
apache/datafusion-comet#4680 · opened on Jun 18, 2026 · 1.2.0
3
Drop support for Spark 3.4
apache/datafusion-comet#4329 · opened on May 14, 2026 · 1.2.0
3
Native Iceberg writes do not use shuffle direct read for their input
apache/datafusion-comet#6913 · opened on Oct 12, 2026 · 1.2.0
fix: preserve columnar output when reverting a cached AQE result stage
Unread
#6852 opened Oct 10, 2026 · Updated Oct 18, 2026
9
perf: read cache statistics null counts from Comet's Arrow vectors
Unread
#6853 opened Oct 10, 2026 · Updated Oct 18, 2026
12
Bump iceberg-rust past apache/iceberg-rust#3255 and narrow the nested schema evolution fallback
apache/datafusion-comet#6934 · opened on Oct 13, 2026 · 1.2.0
feat: bump iceberg-rust past apache/iceberg-rust#3255 and narrow the nested schema evolution fallback
Unread
#7028 opened Oct 15, 2026 · Updated Oct 18, 2026Draft
fix: write the Spark version into the footer of natively written Parquet files
Unread
#7053 opened Oct 16, 2026 · Updated Oct 23, 2026
15
Share Parquet footer and page index metadata across tasks in an executor
apache/datafusion-comet#4994 · opened on Jul 21, 2026 · 1.2.0
1

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1.2.0

Sort-aware Iceberg reads: per-partition streaming merge + report ordering and grouping (v1)

`NegativeExpr::get_properties` reports child ordering and range unchanged

size, arrays_zip, map_from_arrays and array_append return wrong answers for a nondeterministic child

Write blog post for 1.1.0 release

Comet 1.2.0 Release

My priorities for 1.2.0

Native map construction doesn't match Spark 4.0+ float key normalization (-0.0 keys, missing DUPLICATED_MAP_KEY)

Enable spark.comet.exec.localTableScan.enabled when running Spark SQL tests

feat(iceberg): native Iceberg scans of HDFS-backed tables via iceberg-rust's hdfs-native backend

Write blog post for 1.2.0 release

Native Iceberg scan returns wrong values for a column renamed after a VERSION AS OF snapshot

Native Iceberg scan returns nested values that Spark reads as NULL in files without field ids or a name mapping

Native Iceberg scan returns NULL for nested fields of migrated tables that use a name mapping

arrays_overlap returns wrong answers or panics with a constant array beside a column

[Bug] Native make_interval overflows valid time components or loses seconds precision

Register CometArrowAllocator as a Spark MemoryConsumer for JVM-UDF dispatch

[Bug] map_from_arrays / map_from_entries do not enforce null-key rejection or spark.sql.mapKeyDedupPolicy

Drop support for Spark 3.4

Native Iceberg writes do not use shuffle direct read for their input

fix: preserve columnar output when reverting a cached AQE result stage

perf: read cache statistics null counts from Comet's Arrow vectors

Bump iceberg-rust past apache/iceberg-rust#3255 and narrow the nested schema evolution fallback

feat: bump iceberg-rust past apache/iceberg-rust#3255 and narrow the nested schema evolution fallback

fix: write the Spark version into the footer of natively written Parquet files

Share Parquet footer and page index metadata across tasks in an executor

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