apache · leto-b · Feb 9, 2026 · Feb 9, 2026
diff --git a/src/UserGuide/Master/Table/IoTDB-Introduction/Release-history_timecho.md b/src/UserGuide/Master/Table/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,27 @@
 
 ## 1. TimechoDB (Database Core)
 
+### V2.0.8.1
+
+> Release Date: 2026.02.04</br>
+> Download Link: Please contact Timecho Team to obtain the download link</br>
+> Package Name:timechodb-2.0.8.1-bin.zip</br>
+> SHA512 Checksum: 49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 introduces the **Object data type** to table models, significantly enhances audit logging capabilities, optimizes the tree model’s **OPC UA protocol**, adds **covariate-based forecasting** support in AINode, and enables **concurrent inference** in AINode. Additionally, comprehensive improvements have been made to database monitoring, performance, and stability. The detailed release notes are as follows:
+
+- **Query Module**: Added a list view of available DataNode instances, allowing users to [view each node's RPC address and port](../User-Manual/Maintenance-commands_timecho.md#_1-7-viewing-available-nodes).
+- **Query Module**: Introduced a new system table for [statistical query latency analysis](../Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram).
+- **Storage Module**: Added SQL support to retrieve the full definition statements for [tables](../Basic-Concept/Table-Management_timecho.md#_1-4-view-table-creation-statement) and [views](../User-Manual/Tree-to-Table_timecho.md#_2-4-viewing-table-views).
+- **Storage Module**: Optimized the tree model’s [OPC UA protocol](../../latest/API/Programming-OPC-UA_timecho.md).
+- **System Module**: Added support for the [Object data type](../Background-knowledge/Data-Type_timecho.md) in table models.
+- **System Module**: Significantly enhanced and upgraded the [audit log](../User-Manual/Audit-Log_timecho.md) functionality.
+- **System Module**: Added a new system table to monitor [DataNode connection status](../Reference/System-Tables_timecho.md#_2-18-connections).
+- **AINode**: Integrated the built-in **Chronos-2** model, supporting [covariate-based forecasting](../AI-capability/AINode_Upgrade_timecho.md).
+- **AINode**: Built-in models **Timer-XL** and **Sundial** now support [concurrent inference](../AI-capability/AINode_Upgrade_timecho.md).
+- **Stream Processing Module**: When creating a full-data synchronization pipe, it will be [automatically split](../User-Manual/Data-Sync_timecho.md#_2-1-create-a-task) into two independent pipes—one for real-time data and one for historical data—whose remaining event counts can be monitored separately via the `SHOW PIPES` statement.
+- **Others**: Fixed security vulnerabilities **CVE-2025-12183**, **CVE-2025-66566**, and **CVE-2025-11226**.
+
 ### V2.0.6.6
 
 > Release Date: 2026.01.20</br>

diff --git a/src/UserGuide/Master/Tree/IoTDB-Introduction/Release-history_timecho.md b/src/UserGuide/Master/Tree/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,26 @@
 
 ## 1. TimechoDB (Database Core)
 
+### V2.0.8.1
+
+> Release Date: 2026.02.04</br>
+> Download Link: Please contact Timecho Team to obtain the download link</br>
+> Package Name:timechodb-2.0.8.1-bin.zip</br>
+> SHA512 Checksum: 49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 introduces the **Object data type** to table models, significantly enhances audit logging capabilities, optimizes the tree model’s **OPC UA protocol**, adds **covariate-based forecasting** support in AINode, and enables **concurrent inference** in AINode. Additionally, comprehensive improvements have been made to database monitoring, performance, and stability. The detailed release notes are as follows:
+
+- **Query Module**: Added a list view of available DataNode instances, allowing users to [view each node's RPC address and port](../User-Manual/Maintenance-commands_timecho.md#_1-7-viewing-available-nodes).
+- **Query Module**: Introduced a new system table for [statistical query latency analysis](../../latest-Table/Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram).
+- **Storage Module**: Added SQL support to retrieve the full definition statements for [tables](../../latest-Table/Basic-Concept/Table-Management_timecho.md#_1-4-view-table-creation-statement) and [views](../../latest-Table/User-Manual/Tree-to-Table_timecho.md#_2-4-viewing-table-views).
+- **Storage Module**: Optimized the tree model’s [OPC UA protocol](../API/Programming-OPC-UA_timecho.md).
+- **System Module**: Added support for the [Object data type](../../latest-Table/Background-knowledge/Data-Type_timecho.md) in table models.
+- **System Module**: Significantly enhanced and upgraded the [audit log](../User-Manual/Audit-Log_timecho.md) functionality.
+- **System Module**: Added a new system table to monitor [DataNode connection status](../../latest-Table/Reference/System-Tables_timecho.md#_2-18-connections).
+- **AINode**: Integrated the built-in **Chronos-2** model, supporting [covariate-based forecasting](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md).
+- **AINode**: Built-in models **Timer-XL** and **Sundial** now support [concurrent inference](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md).
+- **Stream Processing Module**: When creating a full-data synchronization pipe, it will be [automatically split](../User-Manual/Data-Sync_timecho.md#_2-1-create-a-task) into two independent pipes—one for real-time data and one for historical data—whose remaining event counts can be monitored separately via the `SHOW PIPES` statement.
+- **Others**: Fixed security vulnerabilities **CVE-2025-12183**, **CVE-2025-66566**, and **CVE-2025-11226**.
 
 ### V2.0.6.6
 
@@ -30,10 +50,9 @@
 > Package Name: timechodb-2.0.6.6-bin.zip</br>
 > SHA512 Checksum: d12e60b8119690d63c501d0c2afcd527e39df8a8786198e35b53338e21939e1a9244805e710d81cbb62d02c2739909d7e8227c029660a0cd9ea7ca718cf9bdf6
 
-V2.0.6.6 primarily optimizes query performance for time series in the tree model, while delivering comprehensive improvements in database monitoring, performance, and stability. Specific release contents are as follows:
+V2.0.6.6 primarily optimizes query performance for time series in the tree mode, while delivering comprehensive improvements in database monitoring, performance, and stability. Specific release contents are as follows:
 
 * **Query Module**: Improved query performance for `SHOW/COUNT TIMESERIES/DEVICES` statements.
-* **Others**: Fixed security vulnerabilities CVE-2025-12183, CVE-2025-66566, and CVE-2025-11226.
 
 
 ### V2.0.6.4
@@ -45,7 +64,7 @@ V2.0.6.6 primarily optimizes query performance for time series in the tree model
 
 V2.0.6.4 focuses on enhancements to the storage and AINode modules, resolves several product defects, and provides comprehensive improvements in database monitoring, performance, and stability. Specific release contents are as follows:
 
-* **Storage Module**: Added support for modifying the encoding and compression methods of time series in the tree model.
+* **Storage Module**: Added support for modifying the encoding and compression methods of time series in the tree mode.
 * **AINode**: Introduced one-click deployment and optimized model inference capabilities.
 
 
@@ -206,7 +225,7 @@ V2.0.2.1 adds **table model permission management**, **user ma
 
 V2.0.1.2 officially implements **dual-model configuration (tree + table)**. The table model supports **standard SQL queries**, diverse functions/operators, stream processing, and Benchmarking. Python client adds four new data types, and script tools support TsFile/CSV/SQL import/export. Key updates:
 
-* **Time-Series Table Model:**
+* **Time-Series Table Mode:**
   * Standard SQL: SELECT, WHERE, JOIN, GROUP BY, ORDER BY, LIMIT, nested queries
 * **Query Module:**
   * Logical operators, math functions, time-series functions (e.g., DIFF)

diff --git a/src/UserGuide/latest-Table/IoTDB-Introduction/Release-history_timecho.md b/src/UserGuide/latest-Table/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,27 @@
 
 ## 1. TimechoDB (Database Core)
 
+### V2.0.8.1
+
+> Release Date: 2026.02.04</br>
+> Download Link: Please contact Timecho Team to obtain the download link</br>
+> Package Name:timechodb-2.0.8.1-bin.zip</br>
+> SHA512 Checksum: 49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 introduces the **Object data type** to table models, significantly enhances audit logging capabilities, optimizes the tree model’s **OPC UA protocol**, adds **covariate-based forecasting** support in AINode, and enables **concurrent inference** in AINode. Additionally, comprehensive improvements have been made to database monitoring, performance, and stability. The detailed release notes are as follows:
+
+- **Query Module**: Added a list view of available DataNode instances, allowing users to [view each node's RPC address and port](../User-Manual/Maintenance-commands_timecho.md#_1-7-viewing-available-nodes).
+- **Query Module**: Introduced a new system table for [statistical query latency analysis](../Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram).
+- **Storage Module**: Added SQL support to retrieve the full definition statements for [tables](../Basic-Concept/Table-Management_timecho.md#_1-4-view-table-creation-statement) and [views](../User-Manual/Tree-to-Table_timecho.md#_2-4-viewing-table-views).
+- **Storage Module**: Optimized the tree model’s [OPC UA protocol](../../latest/API/Programming-OPC-UA_timecho.md).
+- **System Module**: Added support for the [Object data type](../Background-knowledge/Data-Type_timecho.md) in table models.
+- **System Module**: Significantly enhanced and upgraded the [audit log](../User-Manual/Audit-Log_timecho.md) functionality.
+- **System Module**: Added a new system table to monitor [DataNode connection status](../Reference/System-Tables_timecho.md#_2-18-connections).
+- **AINode**: Integrated the built-in **Chronos-2** model, supporting [covariate-based forecasting](../AI-capability/AINode_Upgrade_timecho.md).
+- **AINode**: Built-in models **Timer-XL** and **Sundial** now support [concurrent inference](../AI-capability/AINode_Upgrade_timecho.md).
+- **Stream Processing Module**: When creating a full-data synchronization pipe, it will be [automatically split](../User-Manual/Data-Sync_timecho.md#_2-1-create-a-task) into two independent pipes—one for real-time data and one for historical data—whose remaining event counts can be monitored separately via the `SHOW PIPES` statement.
+- **Others**: Fixed security vulnerabilities **CVE-2025-12183**, **CVE-2025-66566**, and **CVE-2025-11226**.
+
 ### V2.0.6.6
 
 > Release Date: 2026.01.20</br>

diff --git a/src/UserGuide/latest/IoTDB-Introduction/Release-history_timecho.md b/src/UserGuide/latest/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,26 @@
 
 ## 1. TimechoDB (Database Core)
 
+### V2.0.8.1
+
+> Release Date: 2026.02.04</br>
+> Download Link: Please contact Timecho Team to obtain the download link</br>
+> Package Name:timechodb-2.0.8.1-bin.zip</br>
+> SHA512 Checksum: 49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 introduces the **Object data type** to table models, significantly enhances audit logging capabilities, optimizes the tree model’s **OPC UA protocol**, adds **covariate-based forecasting** support in AINode, and enables **concurrent inference** in AINode. Additionally, comprehensive improvements have been made to database monitoring, performance, and stability. The detailed release notes are as follows:
+
+- **Query Module**: Added a list view of available DataNode instances, allowing users to [view each node's RPC address and port](../User-Manual/Maintenance-commands_timecho.md#_1-7-viewing-available-nodes).
+- **Query Module**: Introduced a new system table for [statistical query latency analysis](../../latest-Table/Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram).
+- **Storage Module**: Added SQL support to retrieve the full definition statements for [tables](../../latest-Table/Basic-Concept/Table-Management_timecho.md#_1-4-view-table-creation-statement) and [views](../../latest-Table/User-Manual/Tree-to-Table_timecho.md#_2-4-viewing-table-views).
+- **Storage Module**: Optimized the tree model’s [OPC UA protocol](../API/Programming-OPC-UA_timecho.md).
+- **System Module**: Added support for the [Object data type](../../latest-Table/Background-knowledge/Data-Type_timecho.md) in table models.
+- **System Module**: Significantly enhanced and upgraded the [audit log](../User-Manual/Audit-Log_timecho.md) functionality.
+- **System Module**: Added a new system table to monitor [DataNode connection status](../../latest-Table/Reference/System-Tables_timecho.md#_2-18-connections).
+- **AINode**: Integrated the built-in **Chronos-2** model, supporting [covariate-based forecasting](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md).
+- **AINode**: Built-in models **Timer-XL** and **Sundial** now support [concurrent inference](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md).
+- **Stream Processing Module**: When creating a full-data synchronization pipe, it will be [automatically split](../User-Manual/Data-Sync_timecho.md#_2-1-create-a-task) into two independent pipes—one for real-time data and one for historical data—whose remaining event counts can be monitored separately via the `SHOW PIPES` statement.
+- **Others**: Fixed security vulnerabilities **CVE-2025-12183**, **CVE-2025-66566**, and **CVE-2025-11226**.
 
 ### V2.0.6.6
 
@@ -33,7 +53,6 @@
 V2.0.6.6 primarily optimizes query performance for time series in the tree mode, while delivering comprehensive improvements in database monitoring, performance, and stability. Specific release contents are as follows:
 
 * **Query Module**: Improved query performance for `SHOW/COUNT TIMESERIES/DEVICES` statements.
-* **Others**: Fixed security vulnerabilities CVE-2025-12183, CVE-2025-66566, and CVE-2025-11226.
 
 
 ### V2.0.6.4

diff --git a/src/zh/UserGuide/Master/Table/IoTDB-Introduction/Release-history_timecho.md b/src/zh/UserGuide/Master/Table/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,27 @@
 
 ## 1. TimechoDB（数据库内核）
 
+### V2.0.8.1
+
+> 发版时间：2026.02.04</br>
+> 下载地址：请联系天谋工作人员进行下载</br>
+> 安装包名称：timechodb-2.0.8.1-bin.zip</br>
+> SHA512 校验码：49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 版本表模型新增Object数据类型，强化升级审计日志功，优化树模型 OPC UA 协议，AINode 支持协变量预测，以及 AINode 支持并发推理等功能，同时对数据库监控、性能、稳定性进行了全方位提升。具体发布内容如下：
+
+- 查询模块：新增 DataNode 可用节点的列表展示，可[查看节点的 RPC 地址和端口](../User-Manual/Maintenance-statement_timecho.md#_1-7-查看可用节点)
+- 查询模块：表模型新增[统计查询耗时的系统表](../Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram-表)
+- 存储模块：支持通过 SQL 查看[创建表](../Basic-Concept/Table-Management_timecho.md#_1-4-查看表的创建信息)/[视图](../User-Manual/Tree-to-Table_timecho.md#_2-4-查看表视图)的完整定义语句
+- 存储模块：优化树模型 [OPC UA 协议](../../latest/API/Programming-OPC-UA_timecho.md)
+- 系统模块：表模型新增 [Object 数据类型](../Background-knowledge/Data-Type_timecho.md)
+- 系统模块：强化升级[审计日志](../User-Manual/Audit-Log_timecho.md)功能
+- 系统模块：表模型新增 DataNode [节点连接情况](../Reference/System-Tables_timecho.md#_2-18-connections-表)的系统表
+- AINode：内置 chronos-2 模型，支持[协变量预测](../AI-capability/AINode_Upgrade_timecho.md)功能
+- AINode：Timer-XL、Sundial 内置模型支持[并发推理](../AI-capability/AINode_Upgrade_timecho.md)功能
+- 流处理模块：创建全量同步 pipe 会[自动拆分](../User-Manual/Data-Sync_timecho.md#_2-1-创建任务)为实时、历史两个独立 pipe，可通过 show pipes 语句分别查看剩余事件数
+- 其他：修复安全漏洞 CVE-2025-12183、CVE-2025-66566、CVE-2025-11226
+
 ### V2.0.6.6
 
 > 发版时间：2026.01.20</br>
@@ -31,8 +52,7 @@
 
 V2.0.6.6 版本主要优化了树模型时间序列的查询性能，同时对数据库监控、性能、稳定性进行了全方位提升。具体发布内容如下：
 
-* 查询模块：优化了 show/count timeseries/devices 的查询性能
-* 其他：修复安全漏洞 CVE-2025-12183，CVE-2025-66566 and CVE-2025-11226
+* 查询模块：优化了 show/count timeseries/devices 的查询性能 
 
 ### V2.0.6.4
 

diff --git a/src/zh/UserGuide/Master/Tree/IoTDB-Introduction/Release-history_timecho.md b/src/zh/UserGuide/Master/Tree/IoTDB-Introduction/Release-history_timecho.md
@@ -22,6 +22,28 @@
 
 ## 1. TimechoDB（数据库内核）
 
+### V2.0.8.1
+
+> 发版时间：2026.02.04</br>
+> 下载地址：请联系天谋工作人员进行下载</br>
+> 安装包名称：timechodb-2.0.8.1-bin.zip</br>
+> SHA512 校验码：49d97cbf488443f8e8e73cc39f6f320b3bc84b194aed90af695ebd5771650b5e5b6a3abb0fb68059bd01827260485b903c035657b337442f4fdd32c877f2aca3
+
+V2.0.8.1 版本表模型新增Object数据类型，强化升级审计日志功，优化树模型 OPC UA 协议，AINode 支持协变量预测，以及 AINode 支持并发推理等功能，同时对数据库监控、性能、稳定性进行了全方位提升。具体发布内容如下：
+
+- 查询模块：新增 DataNode 可用节点的列表展示，可[查看节点的 RPC 地址和端口](../User-Manual/Maintenance-statement_timecho.md#_1-7-查看可用节点)
+- 查询模块：表模型新增[统计查询耗时的系统表](../../latest-Table/Reference/System-Tables_timecho.md#_2-20-queries-costs-histogram-表)
+- 存储模块：支持通过 SQL 查看[创建表](../../latest-Table/Basic-Concept/Table-Management_timecho.md#_1-4-查看表的创建信息)/[视图](../../latest-Table/User-Manual/Tree-to-Table_timecho.md#_2-4-查看表视图)的完整定义语句
+- 存储模块：优化树模型 [OPC UA 协议](../API/Programming-OPC-UA_timecho.md)
+- 系统模块：表模型新增 [Object 数据类型](../../latest-Table/Background-knowledge/Data-Type_timecho.md)
+- 系统模块：强化升级[审计日志](../User-Manual/Audit-Log_timecho.md)功能
+- 系统模块：表模型新增 DataNode [节点连接情况](../../latest-Table/Reference/System-Tables_timecho.md#_2-18-connections-表)的系统表
+- AINode：内置 chronos-2 模型，支持[协变量预测](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md)功能
+- AINode：Timer-XL、Sundial 内置模型支持[并发推理](../../latest-Table/AI-capability/AINode_Upgrade_timecho.md)功能
+- 流处理模块：创建全量同步 pipe 会[自动拆分](../User-Manual/Data-Sync_timecho.md#_2-1-创建任务)为实时、历史两个独立 pipe，可通过 show pipes 语句分别查看剩余事件数
+- 其他：修复安全漏洞 CVE-2025-12183、CVE-2025-66566、CVE-2025-11226
+
+
 ### V2.0.6.6
 
 > 发版时间：2026.01.20</br>
@@ -32,7 +54,6 @@
 V2.0.6.6 版本主要优化了树模型时间序列的查询性能，同时对数据库监控、性能、稳定性进行了全方位提升。具体发布内容如下：
 
 * 查询模块：优化了 show/count timeseries/devices 的查询性能
-* 其他：修复安全漏洞 CVE-2025-12183，CVE-2025-66566 and CVE-2025-11226
 
 ### V2.0.6.4