TiDB 4.0.0-beta.1 has been released, this version updates are as follows:
Compatibility Changes
- Mysql.user modify the system password field in the table name authentication_string, so that it is consistent with the MySQL 5.7 # 14598
- The default value of txn-total-size-limit configuration items adjusted from 1GB to 100MB # 14522
- Support dynamically modify or update read from the PD configuration item # 14750 # 14303 # 14830
New Features
- Support at any time SLOW_QUERY / CLUSTER_SLOW_QUERY system tables slow log # 14840 # 14878
- Support for SQL performance diagnosis # 14843 # 14810 # 14835 # 14743 # 147743 # 147670 # 14670 # 14668 # 14668 # 14668 # 14668 # 14668
# 14668 - Support sequence function # 14731 # 14589 # 14674 # 14442 # 14303 # 14830 # 14830
- Add function automatically reads the data from the different roles depending on the load balancing policy, and add the leader-and-follower system variable to enable this feature # 14761
- Add Coercibility function # 14739
- Support setting TiFlash copy of the partition table # 14735 # 14713 # 14644
- ......
Bugfix
- Report wrong repair to create a column name more than 64 characters in view of the problem # 14850
- Fix problems due to create or replace view statements result from incorrect handling duplicate data in information_schema.views # 14832
- Enabling plan cache, fix the errors result BatchPointGet # 14855
- Fixed problem when inserted into the modified data to the wrong area after the partition table # 14370
- Use IsTrue repair function in the process of simplifying the outer join in the panic that occurs when an invalid name expression reconstruction # 14515
- Repair show binding statement error checking privileges # 14443
For more details, see the Release Notes .