Issues

• bug: JOIN ON a IS NOT DISTINCT FROM b AND range condition is planned as a range-only merge join (near cross product, OOM)

  databendlabs/databend#21005 · Filter by author TCeason opened on Nov 5, 2026
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• bug: ASOF JOIN with only an inequality condition uses unbounded memory (1M x 1M rows > 30 GB) and ignores max_server_memory_usage

  databendlabs/databend#21004 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: recursive CTE that references itself again in a subquery crashes databend-query with SIGSEGV

  databendlabs/databend#21003 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: long LEFT JOIN chain (about 120 joins) crashes databend-query with SIGSEGV

  databendlabs/databend#21002 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: UNION ALL over stage/file scans drops or mislabels rows (shared partition queue)

  C-bug
  databendlabs/databend#21001 · Filter by author SkyFan2002 opened on Nov 5, 2026
  

• bug: Python driver release mismatch can fail CI on unrelated PRs

  C-bug
  databendlabs/databend#20999 · Filter by author youngsofun opened on Nov 5, 2026
  

• bug: generate_series overflows int64 near the limits (runaway memory with large negative step, wrong error near INT64_MAX)

  databendlabs/databend#20998 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: parse_json / ::JSON on deeply nested input (10000 levels) crashes databend-query with SIGSEGV

  databendlabs/databend#20997 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: regexp_extract with pattern \C panics (assertion in StringColumnBuilder::build_scalar)

  databendlabs/databend#20996 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: correlated recursive CTE in a scalar subquery returns totals across outer rows, or panics with column result type mismatch

  databendlabs/databend#20995 · Filter by author TCeason opened on Nov 5, 2026
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• bug: nested array literal [[[...1...]]] takes exponential time in its depth

  databendlabs/databend#20994 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: ~100 levels of nested parentheses/function calls/struct literals crash databend-query (SIGSEGV)

  databendlabs/databend#20993 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: IEJoin drops matching rows when a range key column contains NULL

  databendlabs/databend#20991 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: scalar subquery in LEFT JOIN ON fails with Unable to get field named "18446744073709551612"

  databendlabs/databend#20990 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: fractional interval quantities are silently truncated ('1.5 HOUR'::INTERVAL = 1:00:00)

  databendlabs/databend#20988 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: self-referencing named window WINDOW w AS (w) crashes databend-query (SIGSEGV)

  databendlabs/databend#20985 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: CTE body binds outer columns when referenced from a LATERAL subquery

  databendlabs/databend#20983 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: strftime/to_string %f prints 9 digits instead of 6

  databendlabs/databend#20982 · Filter by author TCeason opened on Nov 5, 2026
  

• bug: CTAS/INSERT of x % <cast constant> fails with 1104 column result type mismatch

  databendlabs/databend#20981 · Filter by author TCeason opened on Nov 5, 2026
  

• bug(storage): ANALYZE can corrupt published segment metadata on failed FS overwrite

  databendlabs/databend#20968 · Filter by author zhyass opened on Nov 4, 2026
  

• refactor(cache): name disk cache kinds apart from memory cache kinds

  databendlabs/databend#20960 · Filter by author bohutang opened on Nov 3, 2026
  

• refactor(cache): keep merge IO and its single flight out of the cache crate

  databendlabs/databend#20959 · Filter by author bohutang opened on Nov 3, 2026
  

• refactor(fuse): build DiskCachedStorage once per table, from CacheManager

  databendlabs/databend#20958 · Filter by author bohutang opened on Nov 3, 2026
  

• refactor(fuse): rewrite ANALYZE segments and bloom indexes to new paths, drop the disk cache fence

  databendlabs/databend#20957 · Filter by author bohutang opened on Nov 3, 2026
  

• Feature: configurable timestamp formatting for lossless text unload

  C-feature
  databendlabs/databend#20947 · Filter by author youngsofun opened on Nov 2, 2026