Add CREATE DEFAULT SHADOW ALGORITHM docs. (#20968)

Author: JiekerTime

docs/document/content/reference/distsql/syntax/rdl/rule-definition/shadow/create-default-shadow-algorithm.cn.md

@@ -0,0 +1,34 @@
++++
+title = "CREATE DEFAULT SHADOW ALGORITHM"
+weight = 4
++++
+
+## 描述
+
+`CREATE DEFAULT SHADOW ALGORITHM` 语法用于创建影子库默认算法规则。
+
+### 语法定义
+
+```sql
+CreateDefaultShadowAlgorithm ::=
+  'CREATE' 'DEFAULT' 'SHADOW' 'ALGORITHM' 'NAME' '=' algorithmName
+    
+algorithmName ::=
+  identifier
+```
+
+### 示例
+
+#### 创建影子库压测算法
+
+```sql
+CREATE DEFAULT SHADOW ALGORITHM NAME = simple_hint_algorithm;
+```
+
+### 保留字
+
+`CREATE`、`DEFAULT`、`SHADOW`、`ALGORITHM`、`NAME`
+
+### 相关链接
+
+- [保留字](/cn/reference/distsql/syntax/reserved-word/)

docs/document/content/reference/distsql/syntax/rdl/rule-definition/shadow/create-default-shadow-algorithm.en.md

@@ -0,0 +1,34 @@
++++
+title = "CREATE DEFAULT SHADOW ALGORITHM"
+weight = 4
++++
+
+## Description
+
+The `CREATE DEFAULT SHADOW ALGORITHM` syntax is used to create a default shadow algorithm.
+
+### Syntax
+
+```sql
+CreateDefaultShadowAlgorithm ::=
+  'CREATE' 'DEFAULT' 'SHADOW' 'ALGORITHM' 'NAME' '=' algorithmName
+    
+algorithmName ::=
+  identifier
+```
+
+### Example
+
+#### Create a shadow algorithm
+
+```sql
+CREATE DEFAULT SHADOW ALGORITHM NAME = simple_hint_algorithm;
+```
+
+### Reserved word
+
+`CREATE`, `DEFAULT`, `SHADOW`, `ALGORITHM`, `NAME`
+
+### Related links
+
+- [Reserved word](/en/reference/distsql/syntax/reserved-word/)

docs/document/content/reference/distsql/syntax/rdl/rule-definition/shadow/create-shadow-algorithm.cn.md

@@ -11,7 +11,7 @@ weight = 3
 
 ```sql
 CreateShadowAlgorithm ::=
-  'CREATE' 'SHADOW' 'RULE' shadowAlgorithm ( ',' shadowAlgorithm )*
+  'CREATE' 'SHADOW' 'ALGORITHM' shadowAlgorithm ( ',' shadowAlgorithm )*
 
 shadowAlgorithm ::=
   '(' ( algorithmName ',' )? 'TYPE' '(' 'NAME' '=' shadowAlgorithmType ',' 'PROPERTIES' '(' ( 'key' '=' 'value' ( ',' 'key' '=' 'value' )* ) ')' ')'

docs/document/content/reference/distsql/syntax/rdl/rule-definition/shadow/create-shadow-algorithm.en.md

@@ -11,7 +11,7 @@ The `CREATE SHADOW ALGORITHM` syntax is used to create a shadow algorithm.
 
 ```sql
 CreateShadowAlgorithm ::=
-  'CREATE' 'SHADOW' 'RULE' shadowAlgorithm ( ',' shadowAlgorithm )*
+  'CREATE' 'SHADOW' 'ALGORITHM' shadowAlgorithm ( ',' shadowAlgorithm )*
 
 shadowAlgorithm ::=
   '(' ( algorithmName ',' )? 'TYPE' '(' 'NAME' '=' shadowAlgorithmType ',' 'PROPERTIES' '(' ( 'key' '=' 'value' ( ',' 'key' '=' 'value' )* ) ')' ')'

docs/document/content/reference/distsql/syntax/reserved-word.cn.md

@@ -35,7 +35,7 @@ weight = 3
 
 #### 影子压测
 
-`CREATE`、`SHADOW`、`ALGORITHM`、`RULE`、`SOURCE`、`SHADOW`、`TYPE`、`NAME`、`PROPERTIES`
+`CREATE`、`SHADOW`、`DEFAULT`、`ALGORITHM`、`RULE`、`SOURCE`、`SHADOW`、`TYPE`、`NAME`、`PROPERTIES`
 
 ### 补充说明
 

docs/document/content/reference/distsql/syntax/reserved-word.en.md

@@ -35,7 +35,7 @@ weight = 3
 
 #### Shadow
 
-`CREATE`, `SHARDING`, `ALGORITHM`, `SINGLE`, `TABLE`, `RULE`, `RESOURCE`
+`CREATE`, `SHADOW`, `DEFAULT`, `ALGORITHM`, `RULE`, `SOURCE`, `SHADOW`, `TYPE`, `NAME`, `PROPERTIES`
 
 ### Supplement