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Behavior change and compatibility

Features

  1. feat: taosX performance report
  2. feat: support for TLS certificate-based authentication and transmission
  3. feat: add 'timezone' option in rust websocket connection
  4. feat: stream now supports the delete_output_table option
  5. feat: state_window in stream now supports performing operations on the state column
  6. feat: stream supports the recognition of virtual table changes
  7. feat: partition by tag now supports string operations
  8. feat: JDBC WebSocket support multiple endpoints for load balance
  9. feat: re-implement TSMA using the refactored stream
  10. feat: stream computing now supports notification filtering mechanism
  11. feat: support PROPHET algorithm in TDgpt
  12. feat: support Pearson correlation coefficient function
  13. feat: taosX support parsing key like value in kafka
  14. feat: support for the date function
  15. feat: support for functions: IF, ISNULL, ISNOTNULL, NVL, COALESCE, NULLIF, IFNULL
  16. feat: support for functions: std variance stddev_samp var_samp group_concat
  17. feat: support Rollup SMA.
  18. feat: support scanning the integrity of time-series data files using the scan command
  19. feat: add C connector performance benchmark
  20. feat: support for find_in_set, like_in_set, regexp_in_set functions
  21. feat: JDBC reduce query times for high-efficient validation
  22. feat: TDgpt support imputation function
  23. feat: explorer report metrics to taoskeeper

Enhancements

  1. enh: support configuration of state window start and end points
  2. enh: keep agent online by default even if taosX disconnected
  3. enh: improve C WebSocket STMT2 performance
  4. enh: add show ssmigrate command to show the progress of shared storage migration
  5. enh: optimize the performance of stream computing.
  6. enh: add perf parameters for influxdb in Explorer-DataIn
  7. enh: taos shell supports argument values immediately following names on Windows
  8. enh: optimize db size & query speed in taosX start up
  9. enh: cache validation result to reduce license query times
  10. enh: notify statement in stream supports using column aliases
  11. enh: add cpu usage percentage of taosAdapter metric
  12. enh: taosgen add support for write TDengine with individual queues
  13. enh: explorer support contains_bad parameter in OPCDA
  14. enh: enhance error handling for subscribe error in Adapter
  15. enh: STMT2 support decimal type
  16. enh​​: support for ​​BSS (Byte-Stream-Split) encoding​​ on floating-point data
  17. enh: optimized the "Balance Vgroup Leader" command to achieve a more uniform distribution of VGroup leader
  18. enh: separate data query and metadata query processing threads
  19. enh: change default database params to vgroups=4, duration=10 in Explorer
  20. enh: support for REDISTRIBUTE command on dual-replica databases
  21. enh: update standard deviation calculation to prevent potential numeric overflow
  22. enh: show field names even though all values are null in UDT
  23. enh: allow explorer create database with replica
  24. enh: adapter recording sql csv add appName and srcPort
  25. enh: improve the efficiency of event_window queries grouped by tbname
  26. enh: alert udt error when running with rhai udt scripts in taosX

Fixes

  1. fix: out-of-bounds error in table name/Tag calculation during stream processing
  2. fix: data subscription cannot obtain the creation events of normal tables generated by stream
  3. fix: resolved issue where calling the forecast function on super virtual tables failed
  4. fix: taosX special params(sparse/realtime/stables) cause 'No valid epSet' error
  5. fix: taosX-influxdb process not exit when task done
  6. fix: unexpected agent activities in explorer
  7. fix: write part column is not work
  8. fix: incorrect watermark judgment when the ignore_disorder option is enabled in stream
  9. fix: RAND function returns different values even seed is same on windows
  10. fix: the output of 'leastsquares' is inconsistent across compilers
  11. fix: taosd crash when triggered by virtual table with tbname used as a prefilter
  12. fix: inconsistent data and log directories on windows
  13. fix: websocket connection not closed after taos_close
  14. fix: fix the same filename for log to c native
  15. fix: memory leak caused by STMT query errors
  16. fix: taosAdapter json serialization contains unexpected escapes
  17. fix: create taosX task for pi error via Explorer
  18. fix: incorrect calculation in the first window when the FILL_HISTORY option is enabled in stream computing
  19. fix: resolved manual recalculation logic errors in stream
  20. fix: incorrect calculation results in stream when data is out-of-order or deleted
  21. fix: consumer.recv_timeout block runtime in rust connector
  22. fix: STMT2 reports error when binding empty nchar type
  23. fix: cloud taosX license validation issue
  24. fix: crash issue caused by commit thread suspending queries on composite primary keys of Varchar type
  25. fix: fix taosX/explorer too many open files in linux
  26. fix: fix poll deadline elapsed issue when timeout=never in rust taos-ws
  27. fix: taosd crash when executing a large number of concurrent last queries
  28. fix: the cols function returns incorrect results when fetching multiple timestamps
  29. fix: remove stream creation wizard in explorer, use sql directly
  30. fix: TDgpt may fail during concurrent forecast
  31. fix: the issue that ss_keeplocal cannot be set to 1440m
  32. fix: fix cases in explorer permission management
  33. fix: no need to alert when taosX_sys not exist in TDLite
  34. fix: fix influxdb stopping stuck in taosX
  35. fix: explicitly show the database name is case-sensitive
  36. fix: Explorer favorite SQL should be case-sensitive
  37. fix: influxdb multi tags with same ts would cause data lost
  38. fix: Explorer should use COMPOSITE KEY instead of PRIMARY KEY
  39. fix: taosAdapter did not report metrics continuously
  40. fix: ODBC timestamp precision error in ADB UPDATE with ms or ns ts
  41. fix: Kafka data source validation error after upgrading with SASL config
  42. fix: fix deadlock issue in concurrent influxdb migration tasks
  43. fix: preview table contains old fields after payload schema changed in Explorer
  44. fix: crash in ss-migration when fileset does not exist
  45. fix: taosBenchmark interlace_rows param not work if non_stop_mode=yes
  46. fix: consumer recv_timeout cause tmq2local file not completed
  47. fix: cancel restore task not work

What's Changed

New Contributors

Full Changelog: https://github.com/taosdata/TDengine/compare/ver-3.3.7.5...ver-3.3.8.0

Source: README.md, updated 2025-09-29