Issues

Issues

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

  apache/datafusion#27359 · opened on Nov 12, 2026

• Partial aggregation stops skipping after early emits under memory pressure

  apache/datafusion#27350 · opened on Nov 12, 2026

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

  apache/datafusion#27342 · opened on Nov 11, 2026

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

  apache/datafusion#27335 · opened on Nov 11, 2026

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

  apache/datafusion#27332 · opened on Nov 11, 2026

• Call for real world benchmarks / use cases

  apache/datafusion#27330 · opened on Nov 11, 2026
  1

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

  Bug

  apache/datafusion#27328 · opened on Nov 11, 2026

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

  apache/datafusion#27327 · opened on Nov 11, 2026
  1

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

  apache/datafusion#27323 · opened on Nov 11, 2026
  2

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

  apache/datafusion#27322 · 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 · opened on Nov 11, 2026

• Window constructors panic when the expression list is empty

  apache/datafusion#27315 · opened on Nov 10, 2026
  1

• TPC-H Q20: DataFusion vs Polars comparison

  apache/datafusion#27311 · opened on Nov 10, 2026

• TPC-H Q15: DataFusion vs Polars comparison

  apache/datafusion#27310 · opened on Nov 10, 2026

• Improve performance of grouped first_value / last_value ordered by a single primitive column

  Feature

  apache/datafusion#27301 · opened on Nov 10, 2026

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

  apache/datafusion#27298 · opened on Nov 10, 2026

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

  apache/datafusion#27287 · opened on Nov 10, 2026

• LEAD/LAG with offset 0 and IGNORE NULLS returns the default for a NULL row, unlike the form without IGNORE NULLS

  apache/datafusion#27284 · opened on Nov 10, 2026
  1

• TPC-H Q02: DataFusion vs Polars comparison

  apache/datafusion#27282 · opened on Nov 10, 2026

• Let physical-plan producers reuse a CASE's first-WHEN operand as its ELSE value

  apache/datafusion#27280 · opened on Nov 10, 2026

• TPC-H Q01: DataFusion vs Polars comparison

  apache/datafusion#27279 · opened on Nov 10, 2026

• ScalarValue::to_array_of_size panics when a Utf8 or Binary scalar repeated size times passes i32::MAX bytes

  Bug

  apache/datafusion#27277 · opened on Nov 9, 2026

• split_part with position 0 errors on a NULL string only when the position is a literal

  Bug

  apache/datafusion#27276 · opened on Nov 9, 2026
  1

• Consider row-count skew when skipping aggregate repartitioning

  apache/datafusion#27268 · opened on Nov 9, 2026

• Wrong results: ORDER BY ... NULLS LAST on a running MAX window function puts the NULL row first

  apache/datafusion#27267 · opened on Nov 9, 2026
  4