Starrocks

Latest version: v1.2.0

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1.19.5

Improvement

* Improve shuffle bucket plan [(](https://github.com/StarRocks/starrocks/commit/ff7993c0cf73547ee405363e47e330a5fcb5c975)[#2184](https://github.com/StarRocks/starrocks/pull/2184)[)](https://github.com/StarRocks/starrocks/commit/ff7993c0cf73547ee405363e47e330a5fcb5c975)
* Add a num_segment threshold when loading multiple big files [(](https://github.com/StarRocks/starrocks/commit/3a2b3b66bd3bef7cd7494e3ff341fe054ae1e613)[#2067](https://github.com/StarRocks/starrocks/pull/2067)[)](https://github.com/StarRocks/starrocks/commit/3a2b3b66bd3bef7cd7494e3ff341fe054ae1e613)

Bugfix
* **Upgrade Log4j2 to 2.17.0** [(](https://github.com/StarRocks/starrocks/commit/a3567692801727189d649d38ccd42fc1bd1394ca)[#2284](https://github.com/StarRocks/starrocks/pull/2284)[) (](https://github.com/StarRocks/starrocks/commit/a3567692801727189d649d38ccd42fc1bd1394ca)[#2290](https://github.com/StarRocks/starrocks/pull/2290)[)](https://github.com/StarRocks/starrocks/commit/a3567692801727189d649d38ccd42fc1bd1394ca)
* Fix query hive empty partition Error [707](https://github.com/StarRocks/starrocks/pull/707) [(](https://github.com/StarRocks/starrocks/commit/55997a0a2357d45b020dc45e0a0799f4f6a55c66)[#2082](https://github.com/StarRocks/starrocks/pull/2082)[)](https://github.com/StarRocks/starrocks/commit/55997a0a2357d45b020dc45e0a0799f4f6a55c66)

1.19.4

Imporvement
* support cast(varchar as bitmap) (1941)
* Modify Hive external table scan scheduling strategy (1394) (1807)

Bugfix
* Fix cross join lose predicate in JoinAssociativityRule (1918)
* Fix cast to decimal(0,0) bug (1709) (1738)
* Fix replicate join in plan fragment builder (1727)
* Fix several planner cost calculation

1.19.3

Improvement
Upgrade jprotobuf to enhance security (1506)

Major Bugfix
Fix some CBO bad cases and correctness issues.
Fix grouping sets with same column bug(1395) (1119)
Fix some date function issues (1385) (1627)
Fix streaming aggregation issue(1584)

1.19.2

Improvement
* bucket shuffle join support right join and full outer join(1209) (1234)

Major Bugfix
* Support push down predicate through repeat node(1410) (1417)
* Fix routine load data losing bug when FE master changed (1074) (1272)
* Fix create view failed with union (1083)
* Fix some Hive external table stability issues(1408)
* Fix select group by view error (1231)

1.19.1

Improvement

* Optimize the performance of `show frontends`. [ 507](https://github.com/StarRocks/starrocks/pull/507) [# 984](https://github.com/StarRocks/starrocks/pull/984)
* Add monitoring of slow queries and meta logs. [ 502](https://github.com/StarRocks/starrocks/pull/502) [# 891](https://github.com/StarRocks/starrocks/pull/891)
* Optimize the fetching of Hive external metadata to achieve parallel fetching.[ 425](https://github.com/StarRocks/starrocks/pull/425) [# 451](https://github.com/StarRocks/starrocks/pull/451)

BugFix

* Fix the problem of Thrift protocol compatibility, so that the Hive external table can be connected with Kerberos. [ 184](https://github.com/StarRocks/starrocks/pull/184) [# 947](https://github.com/StarRocks/starrocks/pull/947) [# 995](https://github.com/StarRocks/starrocks/pull/995) [# 999](https://github.com/StarRocks/starrocks/pull/999)
* Fix several bugs in view creation. [ 972](https://github.com/StarRocks/starrocks/pull/972) [# 987](https://github.com/StarRocks/starrocks/pull/987)[# 1001](https://github.com/StarRocks/starrocks/pull/1001)
* Fix the problem that FE cannot be upgraded in grayscale. [ 485](https://github.com/StarRocks/starrocks/pull/485) [# 890](https://github.com/StarRocks/starrocks/pull/890)

1.19.0

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 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.

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.

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