TiDB 1.0.8 Release Notes

On February 11, 2018, TiDB 1.0.8 is released with the following updates:

TiDB:

• Fix issues in the Outer Join result in some scenarios
• Optimize the performance of the InsertIntoIgnore statement
• Fix the issue in the ShardRowID option
• Add limitation (Configurable, the default value is 5000) to the DML statements number within a transaction
• Fix an issue in the Table/Column aliases returned by the Prepare statement
• Fix an issue in updating statistics delta
• Fix a panic error in the Drop Column statement
• Fix an DML issue when running the Add Column After statement
• Improve the stability of the GC process by ignoring the regions with GC errors
• Run GC concurrently to accelerate the GC process
• Provide syntax support for the CREATE INDEX statement

PD:

• Reduce the lock overheat of the region heartbeats
• Fix the issue that a hot region scheduler selects the wrong Leader

TiKV:

• Use DeleteFilesInRanges to clear stale data and improve the TiKV starting speed
• Using Decimal in Coprocessor sum
• Sync the metadata of the received Snapshot compulsorily to ensure its safety

To upgrade from 1.0.7 to 1.0.8, follow the rolling upgrade order of PD -> TiKV -> TiDB.