TiDB 1.0.2 Release Notes
On November 13, 2017, TiDB 1.0.2 is released with the following updates:
TiDB
- Optimize the cost estimation of index point query
- Support the
Alter Table Add Column (ColumnDef ColumnPosition)syntax - Optimize the queries whose
whereconditions are contradictory - Optimize the
Add Indexoperation to rectify the progress and reduce repetitive operations - Optimize the
Index Look Joinoperator to accelerate the query speed for small data size - Fix the issue with prefix index judgment
Placement Driver (PD)
- Improve the stability of scheduling under exceptional situations
TiKV
- Support splitting table to ensure one region does not contain data from multiple tables
- Limit the length of a key to be no more than 4 KB
- More accurate read traffic statistics
- Implement deep protection on the coprocessor stack
- Fix the
LIKEbehavior and thedo_div_modbug