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TiDB 2.0.3 Release Notes

On June 1, 2018, TiDB 2.0.3 is released. Compared with TiDB 2.0.2, this release has great improvement in system compatibility and stability.

TiDB

Support modifying the log level online
Support the COM_CHANGE_USER command
Support using the TIME type parameters under the binary protocol
Optimize the cost estimation of query conditions with the BETWEEN expression
Do not display the FOREIGN KEY information in the result of SHOW CREATE TABLE
Optimize the cost estimation for queries with the LIMIT clause
Fix the issue about the YEAR type as the unique index
Fix the issue about ON DUPLICATE KEY UPDATE in conditions without the unique index
Fix the compatibility issue of the CEIL function
Fix the accuracy issue of the DIV calculation in the DECIMAL type
Fix the false alarm of ADMIN CHECK TABLE
Fix the panic issue of MAX/MIN under specific expression parameters
Fix the issue that the result of JOIN is null in special conditions
Fix the IN expression issue when building and querying Range
Fix a Range calculation issue when using Prepare to query and Plan Cache is enabled
Fix the issue that the Schema information is frequently loaded in abnormal conditions

Fix the bug that the learner flag mistakenly reports to PD
Report an error instead of getting a result if divisor/dividend is 0 in do_div_mod