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25 changes: 25 additions & 0 deletions zh_CN/releases/changes.md
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# CHANGELOG

## 2.3.1

发布日期: 2025-05-15

### 新功能

- 新增 `json` 处理函数,提供便捷的 `JSON` 字符串解析与处理,详见[JSON 函数](../sql-reference/json.md)。
- **dlsql 命令行工具增强**:
- 支持关键字高亮显示与智能自动补全,提升编写效率。
- 支持单次输入多条 SQL 语句,简化批量操作流程。

### 增强

- **资源优化**:
- 限制查询对系统内存的占用,提升系统健壮性。
- **时序引擎优化**:
- 当启用存储引擎元数据缓存时,数据持久化阶段自动缓存 meta 信息,提升热数据查询性能。
- **集群模式优化**:
- 下推更多算子至数据节点,减少集群内数据传输量,提升查询性能。
- `EXPLAIN [analyze] [verbose] SELECT select_options` 语句的支持,便于分析集群模式下查询执行计划、分析性能瓶颈,优化 SQL 语句。

### 其它

- 优化集群间通讯逻辑。

## 2.3.0

发布日期: 2025-04-14
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