[doc](opt) Clarify 2.1 mv partition info support

Author: seawinde

i18n/zh-CN/docusaurus-plugin-content-docs/version-2.1/sql-manual/sql-functions/table-valued-functions/mv_infos.md

@@ -68,7 +68,13 @@ MV_INFOS("database"="<database>")
 - `MvPartitionInfo.partitionType`：物化视图的分区方式。
   - `FOLLOW_BASE_TABLE`：物化视图分区跟随基表分区列。
   - `SELF_MANAGE`：物化视图自己管理分区。
-  - `EXPR`：物化视图使用表达式定义分区。
+
+:::info 版本说明
+
+Doris 2.1.x 的 `MvPartitionInfo.partitionType` 支持 `FOLLOW_BASE_TABLE` 和 `SELF_MANAGE`。`EXPR` 分区类型从 Doris 3.0.0 开始支持。
+
+:::
+
 - `SyncWithBaseTables`：物化视图数据是否和基表同步。
   - `1` 或 `true`：已同步。
   - `0` 或 `false`：未完全同步。对于分区物化视图，可以用 `SHOW PARTITIONS FROM <mv_name>` 查看分区级同步状态。
@@ -110,7 +116,7 @@ SyncWithBaseTables: 1
 - `QuerySql` 是物化视图定义的查询 SQL。
 - `EnvInfo` 记录物化视图创建时的环境信息。
 - `MvProperties` 展示物化视图属性。本例中，分区同步由 `partition_sync_limit=100` 和 `partition_sync_time_unit=YEAR` 控制。
-- `MvPartitionInfo` 展示物化视图分区方式。`FOLLOW_BASE_TABLE` 表示跟随基表分区列；`SELF_MANAGE` 表示物化视图自己管理分区；`EXPR` 表示基于表达式定义分区。
+- `MvPartitionInfo` 展示物化视图分区方式。在 Doris 2.1.x 中，`FOLLOW_BASE_TABLE` 表示跟随基表分区列，`SELF_MANAGE` 表示物化视图自己管理分区。`EXPR` 分区类型从 Doris 3.0.0 开始支持。
 - `SyncWithBaseTables` 为 `1`，表示物化视图数据和基表数据同步。`0` 表示不完全同步。对于分区物化视图，可使用 `SHOW PARTITIONS FROM <mv_name>` 查看分区级同步状态。
 
 查看该物化视图最近一次刷新 task：

versioned_docs/version-2.1/sql-manual/sql-functions/table-valued-functions/mv_infos.md

@@ -67,7 +67,13 @@ The following enum fields are commonly used when checking materialized view defi
 - `MvPartitionInfo.partitionType`: how the materialized view is partitioned.
   - `FOLLOW_BASE_TABLE`: materialized view partitions follow a base table partition column.
   - `SELF_MANAGE`: the materialized view manages its own partitions.
-  - `EXPR`: materialized view partitions are defined by an expression.
+
+:::info Version
+
+Doris 2.1.x supports `FOLLOW_BASE_TABLE` and `SELF_MANAGE` for `MvPartitionInfo.partitionType`. The `EXPR` partition type is supported since Doris 3.0.0.
+
+:::
+
 - `SyncWithBaseTables`: whether materialized view data is synchronized with base tables.
   - `1` or `true`: synchronized.
   - `0` or `false`: not fully synchronized. For partitioned materialized views, use `SHOW PARTITIONS FROM <mv_name>` to check partition-level synchronization.
@@ -108,7 +114,7 @@ In this result:
 - `QuerySql` is the query definition of the materialized view.
 - `EnvInfo` records the environment information when the materialized view was created.
 - `MvProperties` shows the properties of the materialized view. In this example, partition synchronization is limited by `partition_sync_limit=100` and `partition_sync_time_unit=YEAR`.
-- `MvPartitionInfo` shows how the materialized view is partitioned. `FOLLOW_BASE_TABLE` means the materialized view follows a base table partition column. `SELF_MANAGE` means the materialized view manages its own partitions. `EXPR` means the materialized view uses an expression-based partition definition.
+- `MvPartitionInfo` shows how the materialized view is partitioned. In Doris 2.1.x, `FOLLOW_BASE_TABLE` means the materialized view follows a base table partition column, and `SELF_MANAGE` means the materialized view manages its own partitions. The `EXPR` partition type is supported since Doris 3.0.0.
 - `SyncWithBaseTables` is `1`, which means the materialized view data is synchronized with its base tables. `0` means it is not fully synchronized. For partitioned materialized views, use `SHOW PARTITIONS FROM <mv_name>` to check partition-level synchronization.
 
 To view the latest refresh task of this materialized view: