TDengine 3.4.0.9 Release Notes

Features

1. feat: taosAdapter add token support for subscription
2. feat: taosdump support import/export virtual tables

Enhancements

1. enh: massive ui enhancement for explorer
2. enh: optimize the impact of frequent child table tag modifications on data writing when child tables of super table have subscriptions
3. enh: table name template support expression
4. enh: improve performance of virtual table queries with the tbname column
5. enh: reduce log files to 3
6. enh: adjust the maximum value of configuration parameter supportVnodes from 4096 to 1024
7. enh: CREATE XNODE TASK error message refinement

Fixes

1. fix: Kafka connection check log refinement
2. fix: the GRANT ALL permission does not take effect when granted to a specific stream
3. fix: the START/STOP STREAM permission does not take effect after being granted
4. fix: failed to drop stream when having the DROP STREAM permission
5. fix: taosd crashes when querying a view without permission
6. fix: the ALTER VIEW permission does not take effect after being granted
7. fix: auditor fails to view the complete user information
8. fix: stream crashes when reading the timestamp of a table with a varchar-type composite primary key
9. fix: failed to drop role using the IF EXISTS syntax
10. fix: the error message is unclear when permissions are missing
11. fix: port occupancy keeps increasing on macOS when calling the taos_query method of the native connection
12. fix: in stream subquery, JOIN statements falsely report the error of missing timestamp primary key when using time placeholders such as _twstart as the first column of query results
13. fix: timestamp columns in query results are incorrectly set when stream subquery contain interval windows
14. fix: audit database creation operations fails to return when the data encryption key is not set
15. fix: ordinary users lack write permission without explicit authorization after creating ordinary tables
16. fix: modify the names of newly added encryption functions to keywords to resolve the issue of keywords being incorrectly written as actual content into the database during data writing
17. fix: timetruncate function occasionally returns no results
18. fix: unexpected error log when create xnode
19. fix: expand parser length to 48k in taosX
20. fix: no response in explorer tmq connection check
21. fix: str len calculation error cause create clause error with invalid raw data len
22. fix: create task via agent error
23. fix: Explorer alert syntax error when switching tag to share topics
24. fix: xnode task stuck at created status
25. fix: Grid auto scalable in Explorer
26. fix: reading tinyint(1)/boolean type for mysql
27. fix: memory leak caused by unreleased auto table creation requests during STMT data writing
28. fix: explorer backup task create error
29. fix: opcplc special point id cause data points list error
30. fix: data in tasks api respond as empty after created successfully
31. fix: Explorer batch operation api error
32. fix: build task update sql error in explorer
33. fix: fast-xml-parser CVE-2026-25896
34. fix: xnoded role time check error cause exit unexpectedly
35. fix: the merge logic processes data incorrectly when stream handles out-of-order data of trigger tables with primary keys
36. fix: client crashes when querying decimal data type using stmt
37. fix: the scan interval is judged incorrectly when sliding < interval during stream sliding trigger
38. fix: during the stream trigger phase, when pending calculation requests are accumulated, max_delay triggering resets the waiting time, resulting in the calculation not being triggered for a long time
39. fix: taosX compatible with 3.4.x information_schema query result changes
40. fix: invalid user login cause adapter memory increase