Issues

• Bug: SIGSEGV when planning a deeply nested set-operation chain, and max_set_operator_count does not prevent it

  databendlabs/databend#20895 · Filter by author wubx opened on Oct 29, 2026
  2

• Feature: Improve Iceberg Parquet read resilience with bounded storage retries

  C-feature
  databendlabs/databend#20872 · Filter by author dantengsky opened on Oct 29, 2026

• Feature: sort a load by the cluster key at ingest when requested

  databendlabs/databend#20867 · Filter by author vbmithr opened on Oct 28, 2026
  1

• Refactor runtime filter into a plan operator and reuse filter push-down

  databendlabs/databend#20865 · Filter by author SkyFan2002 opened on Oct 28, 2026
  

• Window partition shuffles and spills whole wide columns when only a narrow extraction is needed above the window

  databendlabs/databend#20862 · Filter by author dqhl76 opened on Oct 28, 2026
  

• bug: NDJSON COPY ON_ERROR=CONTINUE leaks partial nested values into subsequent rows

  databendlabs/databend#20836 · Filter by author youngsofun opened on Oct 26, 2026
  

• bug(optimizer): join reordering panics for nested ANY JOIN

  databendlabs/databend#20829 · Filter by author dantengsky opened on Oct 23, 2026
  1

  

• Bug: concurrent append-only transactions fail with Unresolvable conflict when compact-after-write is on

  databendlabs/databend#20825 · Filter by author vbmithr opened on Oct 22, 2026
  1

  

• Feature: Dynamic Tables support external storage

  C-feature
  databendlabs/databend#20811 · Filter by author dantengsky opened on Oct 21, 2026
  

• Feature: Materialized Views support external storage

  C-feature
  databendlabs/databend#20810 · Filter by author dantengsky opened on Oct 21, 2026
  

• Tracking: external storage support for Materialized Views and Dynamic Tables

  C-feature
  databendlabs/databend#20809 · Filter by author dantengsky opened on Oct 21, 2026
  

• When the same SQL statement is executed concurrently 50 times, the NIC receive (RECV) bandwidth is saturated.

  databendlabs/databend#20801 · Filter by author blade83lee opened on Oct 20, 2026
  5

  

• bug: CSV unload with ESCAPE = '\\' writes backslashes unescaped, so loading the file with the same format drops backslashes (C:\temp\new → C:tempnew) and merges a row ending in \ with the next row

  C-bug
  databendlabs/databend#20793 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: REPLACE INTO that rewrites a block of a table with an inverted index never finishes (IO worker blocks in OpenDalBlockingWrite::close)

  C-bug
  databendlabs/databend#20789 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: CSV/TSV/NDJSON unload writes TIMESTAMP as session-local time without a UTC offset: the two instants of a DST fall-back hour are written identically, and the reload moves the second one an hour back

  C-bug
  databendlabs/databend#20785 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: integer division DIV is computed through Float64: 1760000000999999999 DIV 1000000000 is 1760000001, and x DIV 1 ≠ x above 2^53

  C-bug
  databendlabs/databend#20784 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: CSV/TSV COPY INTO <table> stores the NULL marker (\N, or the NULL_DISPLAY text) as a string in a STRING NOT NULL column instead of rejecting the row

  C-bug
  databendlabs/databend#20783 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: DOUBLE → DECIMAL computes value * 10^scale in f64: at scale ≥ 10 the stored decimal is off in the last digits (415210.34 becomes 415210.3400000001 after MODIFY COLUMN … DECIMAL(38,10))

  C-bug
  databendlabs/databend#20781 · Filter by author hanke580 opened on Oct 20, 2026
  

• bug: sum()/avg() of BIGINT/UINT64 columns overflow silently (64-bit accumulator wraps): the average of twenty epoch-nanosecond timestamps is negative

  C-bug
  databendlabs/databend#20776 · Filter by author hanke580 opened on Oct 19, 2026
  

• bug: n >= '9' AND n <= '10' on a numeric column is planned as false: the constant folder's range check compares the two string constants as strings; SELECT returns nothing, DELETE/UPDATE affect 0 rows

  C-bug
  databendlabs/databend#20775 · Filter by author hanke580 opened on Oct 19, 2026
  

• bug: CSV unload writes an empty BINARY (and, with QUOTE_STYLE = 'QUOTE_MINIMAL', an empty STRING) as an empty unquoted field, which COPY INTO <table> reads back as NULL

  C-bug
  databendlabs/databend#20773 · Filter by author hanke580 opened on Oct 19, 2026
  

• bug: WHERE v:price > 100 casts the VARIANT to the literal's narrowest integer type (TRY_CAST(… AS UInt8)), so 300 and 70000 compare as NULL and rows are missed, also by DELETE/UPDATE

  C-bug
  databendlabs/databend#20772 · Filter by author hanke580 opened on Oct 19, 2026
  

• feat(storage): support cross-account RAM role / STS security token for OSS connections

  C-feature
  databendlabs/databend#20770 · Filter by author hantmac opened on Oct 19, 2026
  

• Iceberg: answer min/max from manifest column bounds

  databendlabs/databend#20769 · Filter by author djouallah opened on Oct 19, 2026
  

• Iceberg: rewrite manifests (OPTIMIZE TABLE ... COMPACT SEGMENT)

  databendlabs/databend#20768 · Filter by author djouallah opened on Oct 19, 2026