Information Abstract: DRDS analytical read-only instance optimization Join rearrangement and a full table scan parallel increase in acceleration based on CBO, while repairing more than 20 core issues
applicable client: database user / distributed database user / sub-library sub-table / Developer / Internet business / finance and insurance industry / new retail
version / specification features: new features
- Optimization of read-only type for example based on CBO JOIN rearrangements and physical execution policy
- Optimization of RO example full table scan speed
- Optimize the performance of INSERT / REPLACE / UPDATE / DELETE statements
Bug fixes
- Repair concurrent KILL command causes the problem of users can not link DRDS
- Repair the original table auto-increment primary key value exists 0, synchronized to DRDS error problem
- Repair multi-table UPDATE error
- When there is a view Fix users, SHOW TABLES error problem
- Repair table name is too long and can not display management and control issues can not be deleted
- Repair multi-database permissions account can not use the issue of Navicat
- COMPRESS agreement results in the restoration of the user's query set of issues stuck too large
- AVG repair function parameters for the type of query error when TIMESTAMP
- Repair ROUND function returns the type of problem
- Repair SHOW NODE read and write times than integer ceiling
- And repair some DDL statements parsing error problem
- Fix the problem with the broadcast table to build the library name of the error
- Repair scenario specific SQL optimization problem results in physical fragmentation calculated abnormality
- Repair SHOW GRANTS ADMIN account can not see the whole issue of user rights
- Repair multi-column IN error problem when there is only one value
- System repair single table LOCK TABLES caused by abnormal
- Repair the INSERT key has split function, EXPLAIN error problem *
Product Documentation: https://help.aliyun.com/document_detail/49279.html?spm=a2c4g.11186623.6.546.8da8c28b4ty9do#h2-v5-3-11-15622313 -2019-07-043