docs: update alter column fulltext options

docs/reference/sql/alter.md

@@ -12,6 +12,7 @@ ALTER TABLE [db.]table
    [ADD COLUMN name type [options]
     | DROP COLUMN name
     | MODIFY COLUMN name type
+    | MODIFY COLUMN name SET FULLTEXT [WITH <options>]
     | RENAME name
     | SET <option_name>=<option_value> [, ...]
    ]
@@ -77,6 +78,27 @@ Currently following options are supported:
 ALTER TABLE monitor SET 'ttl'='1d';
 ```
 
+### Modify column fulltext index options
+
+Modify the fulltext index options of a column
+
+```sql
+ALTER TABLE monitor MODIFY COLUMN load_15 SET FULLTEXT WITH (enable = 'true', analyzer = 'Chinese', case_sensitive = 'false');
+```
+
+You can specify the following options using `FULLTEXT WITH`:
+
+- `enable`: Determines whether the full-text index is enabled. Supported values are `true` and `false`. Default is `true`.
+- `analyzer`: Sets the language analyzer for the full-text index. Supported values are `English` and `Chinese`. Default is `English`.
+- `case_sensitive`: Determines whether the full-text index is case-sensitive. Supported values are `true` and `false`. Default is `false`.
+
+If `WITH` is not specified, `FULLTEXT` will use the default values.
+
+Currently, the fulltext index can be altered when:
+
+1. The column is of a string type.
+2. Either the column has no fulltext index and the alter command is to enable it, or the column has a fulltext index and the alter command is to disable it.
+
 ### Rename table
 
 Renames the table:

docs/reference/sql/create.md

@@ -268,7 +268,7 @@ You can specify the following options using `FULLTEXT WITH`:
 If `WITH` is not specified, `FULLTEXT` will use the following default values:
 
 - `analyzer`: default is `English`
-- `case_sensitive`: default is `true`
+- `case_sensitive`: default is `false`
 
 For example, to create a table with a full-text index on the `log` column, configuring the analyzer to `Chinese` and setting `case_sensitive` to `false`:
 

i18n/zh/docusaurus-plugin-content-docs/current/reference/sql/alter.md

@@ -12,6 +12,7 @@ ALTER TABLE [db.]table
    [ADD COLUMN name type [options] 
     | DROP COLUMN name
     | MODIFY COLUMN name type
+    | MODIFY COLUMN name SET FULLTEXT [WITH <options>]
     | RENAME name
     | SET <option_name>=<option_value> [, ...]
    ]
@@ -77,6 +78,27 @@ ALTER TABLE monitor MODIFY COLUMN load_15 STRING;
 ALTER TABLE monitor SET 'ttl'='1d';
 ```
 
+### 修改列全文索引选项
+
+修改列的全文索引选项
+
+```sql
+ALTER TABLE monitor MODIFY COLUMN load_15 SET FULLTEXT WITH (enable = 'true', analyzer = 'Chinese', case_sensitive = 'false');
+```
+
+使用 `FULLTEXT WITH` 可以指定以下选项：
+
+- `enable`：设置全文索引是否启用，支持 `true` 和 `false`。默认为 `false`。
+- `analyzer`：设置全文索引的分析器语言，支持 `English` 和 `Chinese`。默认为 `English`。
+- `case_sensitive`：设置全文索引是否区分大小写，支持 `true` 和 `false`。默认为 `false`。
+
+与 `CREATE TABLE` 一样，可以不带 `WITH` 选项，全部使用默认值。
+
+目前，修改列的全文索引选项需要：
+
+1. 列必须是字符串类型。
+2. 列已经启用了全文索引时，只能关闭全文索引，不能修改分词器和大小写敏感性；未启用全文索引时，可以启用全文索引并设置分词器和大小写敏感性。
+
 ### 重命名表
 
 ```sql

i18n/zh/docusaurus-plugin-content-docs/current/reference/sql/create.md

@@ -276,7 +276,7 @@ Query OK, 0 rows affected (0.01 sec)
 如果不带 `WITH` 选项，`FULLTEXT` 将使用默认值：
 
 - `analyzer`：默认 `English`
-- `case_sensitive`：默认 `true`
+- `case_sensitive`：默认 `false`
 
 例如，要创建一个带有全文索引的表，配置 `log` 列为全文索引，并指定分析器为 `Chinese` 且不区分大小写：