Information Summary: DRDS provide Chunk-Based actuator, the optimization of complex queries, and SQL DDL supports asynchronous execution plan management functions
suitable for the customer: the database user / distributed database user / sub-library sub-table / developer / Internet business / finance Insurance / new retail
version / specification features: new features:
- New Chunk-Based actuators, query optimization of complex queries
- New SQL execution plan management (Plan Management)
- Add a new DDL task engine that supports DDL task of viewing, restore and rollback functions
- Add to specify the query to use an index function by way FORCE INDEX HINT
- New ROW function supports non SCALAR subquery
- New DATE_FORMAT, INTERVAL time functions such as full support for the escape character
optimization:
- Examples of default on the main CBO (CBO), the order and automatically selects the Join operator implemented
- More types of sub-query optimization (including Semi