Issues

• 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

• 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

• 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

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

  bug
  apache/datafusion#27322 · Filter by author adriangb opened on Nov 11, 2026
  2

• 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
  1

• API to more easily update schema adapter factory on a ListingTable

  enhancement
  Feature

  apache/datafusion#27314 · Filter by author alamb opened on Nov 10, 2026
  1

• 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

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

  enhancement
  Feature

  apache/datafusion#27301 · Filter by author freakyzoidberg 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

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

  apache/datafusion#27284 · Filter by author Sunninsky opened on Nov 10, 2026
  1

• TPC-H Q02: DataFusion vs Polars comparison

  enhancement
  apache/datafusion#27282 · Filter by author comphead opened on Nov 10, 2026

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

  apache/datafusion#27280 · Filter by author Weijun-H opened on Nov 10, 2026

• TPC-H Q01: DataFusion vs Polars comparison

  enhancement
  apache/datafusion#27279 · Filter by author comphead 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
  Bug

  apache/datafusion#27277 · Filter by author mbutrovich opened on Nov 9, 2026

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

  bug
  Bug

  apache/datafusion#27276 · Filter by author mbutrovich opened on Nov 9, 2026
  1

• Support TIME(p) SQL type

  apache/datafusion#27271 · Filter by author sdf-jkl opened on Nov 9, 2026
  3

  

• Consider row-count skew when skipping aggregate repartitioning

  apache/datafusion#27268 · Filter by author benbellick opened on Nov 9, 2026

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

  bug
  apache/datafusion#27267 · Filter by author alamb opened on Nov 9, 2026
  4

  

• Exact reverse parquet scan counts shared buffers once per batch in its memory reservation

  apache/datafusion#27254 · Filter by author zhuqi-lucas opened on Nov 9, 2026