docs: add SHOW DICTIONARIES SQL reference (#3157)

* docs: add show dictionaries sql reference

* fix

---------

Co-authored-by: baishen <baishen2009@gmail.com>

Author: sundy-li

docs/cn/sql-reference/10-sql-commands/00-ddl/17-dictionary/index.md

@@ -17,3 +17,4 @@ Dictionary 提供了一种基于键值对的方法，用于从各种外部数据
 | 命令 | 描述 |
 |---------|-------------|
 | [SHOW CREATE DICTIONARY](show-create-dictionary.md) | 显示字典的 CREATE 语句 |
+| [SHOW DICTIONARIES](show-dictionaries.md) | 列出字典 |

docs/cn/sql-reference/10-sql-commands/00-ddl/17-dictionary/show-dictionaries.md

@@ -0,0 +1,69 @@
+---
+title: SHOW DICTIONARIES
+sidebar_position: 5
+---
+
+列出当前数据库或指定数据库中的字典。
+
+## 语法
+
+```sql
+SHOW DICTIONARIES [ FROM <database_name> | IN <database_name> ]
+    [ LIMIT <limit> ]
+    [ LIKE '<pattern>' | WHERE <expr> ]
+```
+
+## 参数
+
+| 参数 | 说明 |
+|-----------|-------------|
+| `FROM <database_name>` / `IN <database_name>` | 可选。列出指定数据库中的字典。 |
+| `LIMIT <limit>` | 可选。限制返回的行数。 |
+| `LIKE '<pattern>'` | 可选。按模式过滤字典名称。 |
+| `WHERE <expr>` | 可选。使用表达式过滤结果集。 |
+
+## 示例
+
+```sql
+CREATE DICTIONARY user_info
+(
+    user_id UInt64,
+    user_name String,
+    user_email String
+)
+PRIMARY KEY user_id
+SOURCE(
+    mysql(
+        host = '127.0.0.1'
+        port = '3306'
+        username = 'root'
+        password = 'root'
+        db = 'app'
+        table = 'users'
+    )
+)
+COMMENT 'User dictionary from MySQL';
+
+CREATE DICTIONARY cache
+(
+    key String,
+    value String
+)
+PRIMARY KEY key
+SOURCE(
+    redis(
+        host = '127.0.0.1'
+        port = '6379'
+    )
+)
+COMMENT 'cache dictionary from Redis';
+
+SHOW DICTIONARIES;
+╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
+│ database │ dictionary │   key_names   │         key_types        │       attribute_names      │         attribute_types         │                                          source                                         │           comment           │
+│  String  │   String   │ Array(String) │       Array(String)      │        Array(String)       │          Array(String)          │                                          String                                         │            String           │
+├──────────┼────────────┼───────────────┼──────────────────────────┼────────────────────────────┼─────────────────────────────────┼─────────────────────────────────────────────────────────────────────────────────────────┼─────────────────────────────┤
+│ default  │ cache      │ ["key"]       │ ["VARCHAR NULL"]         │ ["value"]                  │ ["VARCHAR NULL"]                │ redis(host=127.0.0.1 port=6379)                                                         │ cache dictionary from Redis │
+│ default  │ user_info  │ ["user_id"]   │ ["BIGINT UNSIGNED NULL"] │ ["user_name","user_email"] │ ["VARCHAR NULL","VARCHAR NULL"] │ mysql(db=app host=127.0.0.1 password=[hidden] port=3306 table=users username=root)      │ User dictionary from MySQL  │
+╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯```
+```

docs/en/sql-reference/10-sql-commands/00-ddl/17-dictionary/index.md

@@ -17,3 +17,4 @@ Dictionary provides a key-value approach for reading data from various external
 | Command | Description |
 |---------|-------------|
 | [SHOW CREATE DICTIONARY](show-create-dictionary.md) | Shows the CREATE statement for a dictionary |
+| [SHOW DICTIONARIES](show-dictionaries.md) | Lists dictionaries |

docs/en/sql-reference/10-sql-commands/00-ddl/17-dictionary/show-dictionaries.md

@@ -0,0 +1,68 @@
+---
+title: SHOW DICTIONARIES
+sidebar_position: 5
+---
+
+Lists dictionaries in the current or specified database.
+
+## Syntax
+
+```sql
+SHOW DICTIONARIES [ FROM <database_name> | IN <database_name> ]
+    [ LIMIT <limit> ]
+    [ LIKE '<pattern>' | WHERE <expr> ]
+```
+
+## Parameters
+
+| Parameter | Description |
+|-----------|-------------|
+| `FROM <database_name>` / `IN <database_name>` | Optional. Lists dictionaries from the specified database. |
+| `LIMIT <limit>` | Optional. Limits the number of returned rows. |
+| `LIKE '<pattern>'` | Optional. Filters dictionary names by pattern. |
+| `WHERE <expr>` | Optional. Filters the result set with an expression. |
+
+## Examples
+
+```sql
+CREATE DICTIONARY user_info
+(
+    user_id UInt64,
+    user_name String,
+    user_email String
+)
+PRIMARY KEY user_id
+SOURCE(
+    mysql(
+        host = '127.0.0.1'
+        port = '3306'
+        username = 'root'
+        password = 'root'
+        db = 'app'
+        table = 'users'
+    )
+)
+COMMENT 'User dictionary from MySQL';
+
+CREATE DICTIONARY cache
+(
+    key String,
+    value String
+)
+PRIMARY KEY key
+SOURCE(
+    redis(
+        host = '127.0.0.1'
+        port = '6379'
+    )
+)
+COMMENT 'cache dictionary from Redis';
+
+SHOW DICTIONARIES;
+╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
+│ database │ dictionary │   key_names   │         key_types        │       attribute_names      │         attribute_types         │                                          source                                         │           comment           │
+│  String  │   String   │ Array(String) │       Array(String)      │        Array(String)       │          Array(String)          │                                          String                                         │            String           │
+├──────────┼────────────┼───────────────┼──────────────────────────┼────────────────────────────┼─────────────────────────────────┼─────────────────────────────────────────────────────────────────────────────────────────┼─────────────────────────────┤
+│ default  │ cache      │ ["key"]       │ ["VARCHAR NULL"]         │ ["value"]                  │ ["VARCHAR NULL"]                │ redis(host=127.0.0.1 port=6379)                                                         │ cache dictionary from Redis │
+│ default  │ user_info  │ ["user_id"]   │ ["BIGINT UNSIGNED NULL"] │ ["user_name","user_email"] │ ["VARCHAR NULL","VARCHAR NULL"] │ mysql(db=app host=127.0.0.1 password=[hidden] port=3306 table=users username=root)      │ User dictionary from MySQL  │
+╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯```