New Feature
- Implement Global Runtime Filter, which can enable runtime filter for shuffle join.
- CBO Planner is enabled by default, improved colocated join, bucket shuffle, statistical information estimation, etc.
- [Experimental Function] Primary Key model release: To better support real-time/frequent update features, StarRocks has added a new table type: primary key model. The model supports Stream Load, Broker Load, Routine Load, JSON import, and also provides a second-level synchronization tool for MySQL data based on Flink-cdc.
- [Experimental Function] Support write function for external tables. Support writing data to another StarRocks cluster table by external tables to solve the read/write separation requirement and provide better resource isolation.
Improvement
- Performance optimization.
- count distinct int statement
- group by int statement
- or statement
- Optimize disk balance algorithm. Data can be automatically balanced after adding disks to a single machine.
- Support partial column export.
- Optimize
show processlistto show specific SQL. - Support multiple variable settings in SET_VAR .
- Improve the error reporting information, including table_sink, routine load, creation of materialized view, etc.
Bugfix
- Fix the issue that the dynamic partition table cannot be created automatically after the data recovery operation is completed. # 337
- Fix the problem of error reported by row_number function after CBO is opened.
- Fix the problem of FE stuck due to statistical information collection
- Fix the problem that set_var takes effect for session but not for statements.
- Fix the problem that select count(*) returns abnormality on the Hive partition external table.