StarRocks version 1.19

1.19.0

Release date: Octorber 22, 2021

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 feature, StarRocks has added a new table type: primary key model. The model supports Stream Load, Broker Load, Routine Load 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.

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 processlist to 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.

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.

Release date: November 2, 2021

Optimize the performance of show frontends. # 507 # 984
Add monitoring of slow queries. # 502 # 891
Optimize the fetching of Hive external metadata to achieve parallel fetching.# 425 # 451

Fix the problem of Thrift protocol compatibility, so that the Hive external table can be connected with Kerberos. # 184 # 947 # 995 # 999
Fix several bugs in view creation. # 972 # 987 # 1001
Fix the problem that FE cannot be upgraded in grayscale. # 485 # 890

Release date: November 20, 2021

Fix the problem that repeat node cannot do predicate push-down# 1410 # 1417
Repair the problem that routine load may lost data when the cluster alter master node during import.# 1074 # 1272
Fix the problem that creation view cannot support union # 1083
Fix some stability issues of Hive external table# 1408
Fix an issue with group by view# 1231

Release date: November 30, 2021

Release date: December 9, 2021

Release date: December 20, 2021

Release date: March 18, 2022

The following bugs are fixed:

dataformat will produce different results in different versions. #4165
BE nodes may fail because Parquet files are deleted by mistake during data loading. #3521