diff --git a/docs/en/12-taos-sql/10-function.md b/docs/en/12-taos-sql/10-function.md
index 30422ca20c..802eb259bf 100644
--- a/docs/en/12-taos-sql/10-function.md
+++ b/docs/en/12-taos-sql/10-function.md
@@ -877,7 +877,7 @@ INTERP(expr)
 - Interpolation is performed based on `FILL` parameter.
 - `INTERP` can only be used to interpolate in single timeline. So it must be used with `partition by tbname` when it's used on a STable.
 - Pseudocolumn `_irowts` can be used along with `INTERP` to return the timestamps associated with interpolation points(support after version 3.0.1.4).
-- Pseudocolumn `_isfilled` can be used along with `INTERP` to indicate whether the results are original records or data points generated by interpolation algorithm(support after version 3.0.2.1).
+- Pseudocolumn `_isfilled` can be used along with `INTERP` to indicate whether the results are original records or data points generated by interpolation algorithm(support after version 3.0.2.3).
 
 ### LAST
 
diff --git a/docs/en/12-taos-sql/29-changes.md b/docs/en/12-taos-sql/29-changes.md
index 78b6d5fc05..89247f913b 100644
--- a/docs/en/12-taos-sql/29-changes.md
+++ b/docs/en/12-taos-sql/29-changes.md
@@ -54,7 +54,6 @@ The following data types can be used in the schema for standard tables.
 | 27 | GRANT | Added | Grants permissions to a user.
 | 28 | KILL TRANSACTION | Added | Terminates an mnode transaction.
 | 29 | KILL STREAM | Deprecated | Terminated a continuous query. The continuous query feature has been replaced with the stream processing feature.
-| 30 | MERGE VGROUP | Added | Merges vgroups.
 | 31 | REVOKE | Added | Revokes permissions from a user.
 | 32 | SELECT	| Modified | <ul><li>SELECT does not use the implicit results column. Output columns must be specified in the SELECT clause. </li><li>DISTINCT support is enhanced. In previous versions, DISTINCT only worked on the tag column and could not be used with JOIN or GROUP BY. </li><li>JOIN support is enhanced. The following are now supported after JOIN: a WHERE clause with OR, operations on multiple tables, and GROUP BY on multiple tables. </li><li>Subqueries after FROM are enhanced. Levels of nesting are no longer restricted. Subqueries can be used with UNION ALL. Other syntax restrictions are eliminated. </li><li>All scalar functions can be used after WHERE. </li><li>GROUP BY is enhanced. You can group by any scalar expression or combination thereof. </li><li>SESSION can be used on supertables. When PARTITION BY is not used, data in supertables is merged into a single timeline. </li><li>STATE_WINDOW can be used on supertables. When PARTITION BY is not used, data in supertables is merged into a single timeline. </li><li>ORDER BY is enhanced. It is no longer required to use ORDER BY and GROUP BY together. There is no longer a restriction on the number of order expressions. NULLS FIRST and NULLS LAST syntax has been added. Any expression that conforms to the ORDER BY semantics can be used. </li><li>Added PARTITION BY syntax. PARTITION BY replaces GROUP BY tags. </li></ul>
 | 33 | SHOW ACCOUNTS | Deprecated | This Enterprise Edition-only statement has been removed. It returns the error "This statement is no longer supported."
@@ -76,7 +75,6 @@ The following data types can be used in the schema for standard tables.
 | 49 | SHOW TRANSACTIONS | Added | Shows all running transactions in the system.
 | 50 | SHOW DNODE VARIABLES | Added | Shows the configuration of the specified dnode.
 | 51 | SHOW VNODES | Not supported | Shows information about vnodes in the system. Not supported.
-| 52 | SPLIT VGROUP | Added | Splits a vgroup into two vgroups.
 | 53 | TRIM DATABASE | Added | Deletes data that has expired and orders the remaining data in accordance with the storage configuration.
 
 ## SQL Functions
diff --git a/docs/zh/12-taos-sql/10-function.md b/docs/zh/12-taos-sql/10-function.md
index cb99c83cc5..81fdb46f25 100644
--- a/docs/zh/12-taos-sql/10-function.md
+++ b/docs/zh/12-taos-sql/10-function.md
@@ -880,7 +880,7 @@ INTERP(expr)
 - INTERP 根据 FILL 字段来决定在每个符合输出条件的时刻如何进行插值。
 - INTERP 只能在一个时间序列内进行插值，因此当作用于超级表时必须跟 partition by tbname 一起使用。
 - INTERP 可以与伪列 _irowts 一起使用，返回插值点所对应的时间戳(3.0.1.4版本以后支持)。
-- INTERP 可以与伪列 _isfilled 一起使用，显示返回结果是否为原始记录或插值算法产生的数据(3.0.2.1版本以后支持)。
+- INTERP 可以与伪列 _isfilled 一起使用，显示返回结果是否为原始记录或插值算法产生的数据(3.0.2.3版本以后支持)。
 
 ### LAST
 
diff --git a/docs/zh/12-taos-sql/29-changes.md b/docs/zh/12-taos-sql/29-changes.md
index 1e421f95e1..6c276b081f 100644
--- a/docs/zh/12-taos-sql/29-changes.md
+++ b/docs/zh/12-taos-sql/29-changes.md
@@ -54,7 +54,6 @@ description: "TDengine 3.0 版本的语法变更说明"
 | 27 | GRANT | 新增 | 授予用户权限。
 | 28 | KILL TRANSACTION | 新增 | 终止管理节点的事务。
 | 29 | KILL STREAM | 废除 | 终止连续查询。3.0版本不再支持连续查询，而是用更通用的流计算来代替。
-| 30 | MERGE VGROUP | 新增 | 合并VGROUP。
 | 31 | REVOKE | 新增 | 回收用户权限。
 | 32 | SELECT	| 调整 | <ul><li>SELECT关闭隐式结果列，输出列均需要由SELECT子句来指定。</li><li>DISTINCT功能全面支持。2.x版本只支持对标签列去重，并且不可以和JOIN、GROUP BY等子句混用。</li><li>JOIN功能增强。增加支持：JOIN后WHERE条件中有OR条件；JOIN后的多表运算；JOIN后的多表GROUP BY。</li><li>FROM后子查询功能大幅增强。不限制子查询嵌套层数；支持子查询和UNION ALL混合使用；移除其他一些之前版本的语法限制。</li><li>WHERE后可以使用任意的标量表达式。</li><li>GROUP BY功能增强。支持任意标量表达式及其组合的分组。</li><li>SESSION可以用于超级表了。没有PARTITION BY时，超级表的数据会被合并成一条时间线。</li><li>STATE_WINDOW可以用于超级表了。没有PARTITION BY时，超级表的数据会被合并成一条时间线。</li><li>ORDER BY功能大幅增强。不再必须和GROUP BY子句一起使用；不再有排序表达式个数的限制；增加支持NULLS FIRST/LAST语法功能；支持符合语法语义的任意表达式。</li><li>新增PARTITION BY语法。替代原来的GROUP BY tags。</li></ul>
 | 33 | SHOW ACCOUNTS | 废除 | 2.x中为企业版功能，3.0不再支持。语法暂时保留了，执行报“This statement is no longer supported”错误。
@@ -76,7 +75,6 @@ description: "TDengine 3.0 版本的语法变更说明"
 | 49 | SHOW TRANSACTIONS | 新增 | 显示当前系统中正在执行的事务的信息。
 | 50 | SHOW DNODE VARIABLES | 新增 |显示指定DNODE的配置参数。
 | 51 | SHOW VNODES | 暂不支持 | 显示当前系统中VNODE的信息。3.0.0版本暂不支持。
-| 52 | SPLIT VGROUP | 新增 | 拆分VGROUP。
 | 53 | TRIM DATABASE | 新增 | 删除过期数据，并根据多级存储的配置归整数据。
 
 ## SQL 函数变更
diff --git a/docs/zh/14-reference/12-config/index.md b/docs/zh/14-reference/12-config/index.md
index bc62a536e5..c42130901f 100644
--- a/docs/zh/14-reference/12-config/index.md
+++ b/docs/zh/14-reference/12-config/index.md
@@ -698,7 +698,7 @@ charset 的有效值是 UTF-8。
 | 2  |   numOfThreadsPerCore   | 是              | 否              | 有其它参数设置多种线程池的大小                    |
 | 3  |       numOfMnodes       | 是              | 否              | 通过 create mnode 命令动态创建 mnode              |
 | 4  |        vnodeBak         | 是              | 否              | 3.0 行为未知                                      |
-| 5  |         balance         | 是              | 否              | 负载均衡功能由 split/merge vgroups 实现           |
+| 5  |         balance         | 是              | 否              | 负载均衡功能由 split/merge vgroups 实现 （暂不支持）           |
 | 6  |     balanceInterval     | 是              | 否              | 随着 balance 参数失效                             |
 | 7  |    offlineThreshold     | 是              | 否              | 3.0 行为未知                                      |
 | 8  |          role           | 是              | 否              | 由 supportVnode 决定是否能够创建                  |