release-1.0.4.md

title	aliases
TiDB 1.0.4 Release Notes	/docs/dev/releases/release-1.0.4/ /docs/dev/releases/104/

TiDB 1.0.4 Release Notes

On December 11, 2017, TiDB 1.0.4 is released with the following updates:

TiDB

• Speed up the loading of the statistics when starting the tidb-server
• Improve the performance of the show variables statement
• Fix a potential issue when using the Add Index statement to handle the combined indexes
• Fix a potential issue when using the Rename Table statement to move a table to another database
• Accelerate the effectiveness for the Alter/Drop User statement

TiKV

• Fix a possible performance issue when a snapshot is applied
• Fix the performance issue for reverse scan after removing a lot of data
• Fix the wrong encoded result for the Decimal type under special circumstances

To upgrade from 1.0.3 to 1.0.4, follow the rolling upgrade order of PD -> TiKV -> TiDB.