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TiDB 2.1.15 Release Notes
Release date: July 16, 2019
TiDB version: 2.1.15
TiDB Ansible version: 2.1.15
TiDB
- Fix the issue that the
DATE_ADD
function returns wrong results due to incorrect alignment when dealing with microseconds #11289 - Fix the issue that an error is reported when the empty value in the string column is compared with
FLOAT
orINT
#11279 - Fix the issue that the
INSERT
function fails to correctly return theNULL
value when a parameter isNULL
#11249 - Fix the issue that an error occurs when indexing the column of the non-string type and
0
length #11215 - Add the
SHOW TABLE REGIONS
statement to query the Region distribution of a table through SQL statements #11238 - Fix the issue that an error is reported when using the
UPDATE … SELECT
statement because the projection elimination is used to optimize rules in theSELECT
subqueries #11254 - Add the
ADMIN PLUGINS ENABLE
/ADMIN PLUGINS DISABLE
SQL statement to dynamically enable or disable plugins #11189 - Add the session connection information in the Audit plugin #11189
- Fix the panic issue that happens when a column is queried on multiple times and the returned result is
NULL
during point queries #11227 - Add the
tidb_scatter_region
configuration item to scatter table Regions when creating a table #11213 - Fix the data race issue caused by non-thread safe
rand.Rand
when using theRAND
function #11170 - Fix the issue that the comparison result of integers and non-integers is incorrect in some cases #11191
- Support modifying the collation of a database or a table, but the character set of the database/table has to be UTF-8 or utf8mb4 #11085
- Fix the issue that the precision shown by the
SHOW CREATE TABLE
statement is incomplete whenCURRENT_TIMESTAMP
is used as the default value of the column and the float precision is specified #11087
TiKV
- Unify the log format #5083
- Improve the accuracy of Region's approximate size or keys in extreme cases to improve the accuracy of scheduling #5085
PD
- Unify the log format #1625
Tools
TiDB Binlog
- Optimize the Pump GC strategy and remove the restriction that the unconsumed binlog cannot be cleaned to make sure that the resources are not occupied for a long time #663
TiDB Lightning
- Fix the import error that happens when the column names specified by the SQL dump are not in lowercase #210
TiDB Ansible
- Add the
parse duration
andcompile duration
monitoring items in TiDB Dashboard to monitor the time that it takes to parse SQL statements and execute compilation #815
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