Issues

• bench.sh cannot generate TPC-H data with tpchgen-cli 4.0

  bug
  Bug

  apache/datafusion#27406 · Filter by author mbutrovich opened on Nov 13, 2026

• Internal error when two aggregates share an IS TRUE / IS FALSE / IS UNKNOWN argument on a nullable column

  bug
  Bug

  apache/datafusion#27404 · Filter by author leoyvens opened on Nov 13, 2026

• Window functions: bulk evaluation of frames and of runs of small partitions in BoundedWindowAggExec (measured prototype)

  apache/datafusion#27400 · Filter by author Sunninsky opened on Nov 13, 2026

• Implement contiguous match storage for Hash Join indexing

  apache/datafusion#27398 · Filter by author 2010YOUY01 opened on Nov 13, 2026

• first_value / last_value of a struct with a Utf8View field is quadratic in the number of groups

  apache/datafusion#27390 · Filter by author cetra3 opened on Nov 13, 2026

• A FULL or LEFT hash join whose probe side gives no row emits its unmatched build rows as one batch, ignoring batch_size

  bug
  Bug

  apache/datafusion#27379 · Filter by author ndscoder opened on Nov 12, 2026
  1

  

• Avoid casting run-end encoded Utf8 columns in LIKE / ILIKE

  apache/datafusion#27376 · Filter by author asubiotto opened on Nov 12, 2026

• simplify_expressions misoptimizes +0.0 vs -0.0 literal equality/inequality conjunctions via ScalarValue::PartialEq

  apache/datafusion#27365 · Filter by author xgbtxy opened on Nov 12, 2026
  1

• Remove deprecated aggregate_functional_dependencies

  apache/datafusion#27364 · Filter by author asolimando opened on Nov 12, 2026
  1

  

• No type coercion between time values with different units (Time64(µs) = Time64(ns) fails)

  apache/datafusion#27359 · Filter by author sdf-jkl opened on Nov 12, 2026
  

• Partial aggregation stops skipping after early emits under memory pressure

  bug
  apache/datafusion#27350 · Filter by author comphead opened on Nov 12, 2026
  

• Move SparkOptions and enable_ansi_mode from datafusion-common to datafusion-spark

  enhancementspark
  apache/datafusion#27342 · Filter by author andygrove opened on Nov 11, 2026
  3

• Comparing a DOUBLE with a DECIMAL casts the DOUBLE to Decimal128(30, 15), which fails on large values and NaN and truncates small ones

  bug
  apache/datafusion#27335 · Filter by author andygrove opened on Nov 11, 2026

• Unparser emits empty SELECT list for empty Projection nodes, ignoring supports_empty_select_list

  apache/datafusion#27332 · Filter by author dreverri opened on Nov 11, 2026

• Call for real world benchmarks / use cases

  apache/datafusion#27330 · Filter by author alamb opened on Nov 11, 2026
  1

• Scalar subquery in a VALUES row fails with "Internal error: ScalarSubqueryExpr evaluated before the subquery was executed"

  bug
  Bug

  apache/datafusion#27328 · Filter by author v28k opened on Nov 11, 2026

• Parquet protobuf decoder panics on an out-of-bounds projection index

  apache/datafusion#27327 · Filter by author geoHeil opened on Nov 11, 2026
  1

• Order-preserving RepartitionExec fails with ResourcesExhausted on non-spillable merge reservation for Utf8View data

  bug
  apache/datafusion#27323 · Filter by author adriangb opened on Nov 11, 2026
  2

  

• SortMergeJoinExec double counts join key columns in the buffered batch reservation

  bug
  apache/datafusion#27322 · Filter by author adriangb opened on Nov 11, 2026
  3

  

• SanityCheckPlan fails after ProjectionPushdown for GROUP BY over a mark join on a struct field (regression from #26747)

  apache/datafusion#27318 · Filter by author cetra3 opened on Nov 11, 2026

• Window constructors panic when the expression list is empty

  apache/datafusion#27315 · Filter by author geoHeil opened on Nov 10, 2026
  2

• TPC-H Q20: DataFusion vs Polars comparison

  enhancement
  apache/datafusion#27311 · Filter by author comphead opened on Nov 10, 2026

• TPC-H Q15: DataFusion vs Polars comparison

  enhancement
  apache/datafusion#27310 · Filter by author comphead opened on Nov 10, 2026

• Make it explicit when operators start work before their stream is polled

  apache/datafusion#27298 · Filter by author tschwarzinger opened on Nov 10, 2026

• REGRESSION: SanityCheckPlan error for GROUP BY ... HAVING on a CASE key with parquet filter pushdown

  apache/datafusion#27287 · Filter by author cetra3 opened on Nov 10, 2026