New Features/Improvements

1. alter table add column can support encode and compress parameters
2. Configuration parameter supportVnodes can be changed dynamically using alter command
3. Minimize the impact on read/write by compact operation
4. Adjust the default value of supportVnodes to 2*Cores+5
5. lossyColumnn parameter is obsoleted
6. Support specifying ENCODE and COMPRESS when adding columns to existing table
7. Update SupportVnodes on the fly
8. Support CentOS Stream

New Features/Improvements (Enterprise only)

1. balance vgroup leader can be performed on a database (Enterprise only)
2. Each mount point in multi-level storage can be configured as allowing new file or not (Enterprise only)
3. Speed control can be set for cross-level data transfer
4. IP white list can be adjusted dynamically
5. New user doesn't have privilege to create database by default
6. Optimized process of configuring key for database encryption
7. Data compression for data transfer between TDengine 2.x and 3.x
8. Data transfer from Oracle to TDengine
9. Data transfer from SQL Server to TDengine
10. OPC UA data points can be found and added in data in tasks dynamically
11. Pi backfill task can be paused and resumed
12. Pi backfill can work with data transformation
13. Performance and stability improvement for Pi data in tasks
14. VARBINARY and GEOMETRY data types can be used when creating tables in taos-explorer
15. User can transfer user/password and privilege data between TDengine clusters using taos-explorer
16. Pi data transfer supports newly added assets of an element
17. taos-explorer can use native connection for the sink TDengine
18. GSSAPI support for Kafka connector
19. MQTT tasks can obtain sample data from the data source
20. Object array support in MQTT data
21. Data parsing with custom scripts
22. Dynamic data filtering with plugins

Fixed Bugs

1. metadata broken by TSMA
2. count(*) result is wrong when filtering by supertable tags or where conditions
3. The output precision is wrong of function to_iso8601()
4. taosd exit abnormally because of querying first() and last() together with interval() and fill()
5. Deleting a consumer group of one topic caused consumption failure of another consumer group of same name for another topic
6. Column index of STMT binding over boundary caused taosd exited abnormally
7. Only one parameter is changed successfully when altering multiple parameters for a table
8. Union caused taosd hang when the leader is switched frequently
9. Cast() caused taosd exited abnormally
10. count window and sliding caused taosd exited abnormally
11. Performance downgrade of group by tbname
12. Other fixing for known bugs