Issues

• [Bug]: SELECT 1.5e silently returns 1.5 with alias 'e' instead of ERROR 1064

  kind/bugseverity/s1
  matrixorigin/matrixone#31057 · Filter by author iamlinjunhong opened on Oct 24, 2026
  

• [Bug]: executable comments /*!NNNNN*/ always run - no version gate in the MySQL dialect lexer

  kind/bugseverity/s1
  matrixorigin/matrixone#31056 · Filter by author iamlinjunhong opened on Oct 24, 2026
  

• [Bug]: SELECT 'a' 'b' silently returns 'a' with alias 'b'; MySQL concatenates the adjacent literals

  kind/bugseverity/s1
  matrixorigin/matrixone#31055 · Filter by author iamlinjunhong opened on Oct 24, 2026
  

• [Performance]: avoid redundant destination NULL prefix scans in string-vector batch appends

  kind/performance
  matrixorigin/matrixone#31054 · Filter by author LeftHandCold opened on Oct 24, 2026
  

• [Feature Request]: index file I/O layer and disk cache over index chunk tables

  kind/feature
  matrixorigin/matrixone#31051 · Filter by author cpegeric opened on Oct 24, 2026
  

• [Bug]: Session timestamp override loses a microsecond for some fractions

  matrixorigin/matrixone#31047 · Filter by author XuPeng-SH opened on Oct 24, 2026
  

• [Bug]: Primary-key prefix equality skips selective secondary-index point access even with FORCE INDEX

  kind/bug
  matrixorigin/matrixone#31046 · Filter by author XuPeng-SH opened on Oct 24, 2026
  1

  

• [Bug]: metadata_scan null_cnt misses persisted VARCHAR NULLs

  kind/bugneeds-triage
  Bug

  matrixorigin/matrixone#31045 · Filter by author Ariznawlll opened on Oct 24, 2026 · MO-202610

• [Bug]: [flaky] multi-CN index rebuild UT: copy-alter (flush=false) loses column note on cn1 (TestIssue29566IndexRebuildCoordinator)

  kind/bug
  matrixorigin/matrixone#31042 · Filter by author XuPeng-SH opened on Oct 24, 2026
  1

  

• [Performance]: Prune redundant derived expressions from GROUP BY

  area/optimizerkind/performance
  matrixorigin/matrixone#31037 · Filter by author XuPeng-SH opened on Oct 24, 2026

• [Bug]: Integer + and * keep the operand width and error 1690 on common column expressions instead of widening

  kind/bugseverity/s0
  matrixorigin/matrixone#31036 · Filter by author iamlinjunhong opened on Oct 24, 2026
  

• [Performance]: avoid full-width arithmetic for short Decimal128 coefficients

  kind/performance
  matrixorigin/matrixone#31031 · Filter by author LeftHandCold opened on Oct 24, 2026
  

• [Bug]: PAUSE/RESUME/CANCEL DAEMON TASK skip the privilege check; connect-only users can kill sys daemon tasks

  kind/bugseverity/s0
  matrixorigin/matrixone#31030 · Filter by author iamlinjunhong opened on Oct 24, 2026
  

• [CI] Runner checkout, Docker socket, and coverage setup failures

  kind/bugneeds-triage
  matrixorigin/matrixone#31028 · Filter by author iamlinjunhong opened on Oct 24, 2026
  66

  

• [Bug]: Python SDK clone and branch builders lose resolved ORM schemas

  kind/bugneeds-triage
  matrixorigin/matrixone#31025 · Filter by author MatrixAdventurer opened on Oct 24, 2026
  

• [Performance]: ordinary grouping allocates dynamic-only scratch and repeats raw string key dispatch

  kind/performance
  matrixorigin/matrixone#31024 · Filter by author LeftHandCold opened on Oct 24, 2026
  

• [Bug]: Python fulltext builders drop explicit LIMIT 0

  kind/bugneeds-triage
  matrixorigin/matrixone#31023 · Filter by author MatrixAdventurer opened on Oct 24, 2026
  

• [Performance]: Repeated legacy TEXT declaration parsing adds milliseconds to short queries

  kind/performanceseverity/s0
  matrixorigin/matrixone#31007 · Filter by author LeftHandCold opened on Oct 23, 2026
  1

  

• [Performance]: Fixed MIN/MAX repeats provenance preflight for ordinary vectors

  kind/performanceseverity/s0
  matrixorigin/matrixone#31005 · Filter by author LeftHandCold opened on Oct 23, 2026
  1

  

• [Performance]: DATE_TRUNC fixed units repeatedly decompose the Gregorian calendar

  kind/performanceseverity/s0
  matrixorigin/matrixone#31003 · Filter by author LeftHandCold opened on Oct 23, 2026
  1

  

• [Performance]: partition Top-1 repeatedly copies payload rows within one group run

  kind/performanceseverity/s0
  matrixorigin/matrixone#31002 · Filter by author LeftHandCold opened on Oct 23, 2026
  

• [Bug]: GROUP BY on two nullable LONGTEXT keys fails after width overflow

  ai-easykind/bugseverity/s0
  matrixorigin/matrixone#30997 · Filter by author LeftHandCold opened on Oct 23, 2026
  

• [Bug]: Graceful CN shutdown leaves new queries targeting the exited worker until topology refresh

  kind/bugneeds-triage
  matrixorigin/matrixone#30993 · Filter by author XuPeng-SH opened on Oct 23, 2026
  

• [Bug]: information_schema.COLUMNS.COLUMN_DEFAULT returns quoted literal text and 'null' string instead of the default value

  kind/bug
  matrixorigin/matrixone#30991 · Filter by author MatrixAdventurer opened on Oct 23, 2026
  

• [Performance]: HNSW falls back to a brute-force full table scan whenever the async index lags (#30117)

  area/performancekind/performance
  matrixorigin/matrixone#30987 · Filter by author cpegeric opened on Oct 23, 2026
  2