add doc of md5(),sha()/sha1() and remove decode(),encode()

docs/MatrixOne/Reference/Functions-and-Operators/String/md5.md

@@ -0,0 +1,37 @@
+# MD5()
+
+## 函数说明
+
+`MD5()` 函数一种广泛使用的哈希函数，用于生成一个字符串的 32 字符长的十六进制 MD5 哈希值，它可以将任意长度的输入消息转换为一个 128 位（16 字节）的哈希值，通常表示为 32 位的十六进制字符串。如果参数为 NULL，则返回 NULL。
+
+## 函数语法
+
+```
+> MD5(str)
+```
+
+## 参数释义
+
+|  参数        | 说明                                  |
+|  --------   | ------------------------------------  |
+| str         | 必要参数。要转换的字符串         |
+
+## 示例
+
+```SQL
+mysql> select md5("hello world");
++----------------------------------+
+| md5(hello world)                 |
++----------------------------------+
+| 5eb63bbbe01eeed093cb22bb8f5acdc3 |
++----------------------------------+
+1 row in set (0.00 sec)
+
+mysql> select md5(null);
++-----------+
+| md5(null) |
++-----------+
+| NULL      |
++-----------+
+1 row in set (0.00 sec)
+```

docs/MatrixOne/Reference/Functions-and-Operators/String/sha1.md

@@ -0,0 +1,45 @@
+# SHA1()/SHA()
+
+## 函数说明
+
+`SHA1()/SHA()` 函数是一种加密哈希函数，用于计算并返回给定字符串的 SHA-1 哈希值，它将任意长度的输入消息转换为一个固定长度（160 位，即 20 字节）的哈希值，通常表示为 40 个十六进制字符。如果参数为 NULL，则返回 NULL。
+
+## 函数语法
+
+```
+> SHA1/SHA(str)
+```
+
+## 参数释义
+
+|  参数        | 说明                                  |
+|  --------   | ------------------------------------  |
+| str         | 必要参数。要加密的字符串          |
+
+## 示例
+
+```SQL
+mysql> select sha1("hello world");
++------------------------------------------+
+| sha1(hello world)                        |
++------------------------------------------+
+| 2aae6c35c94fcfb415dbe95f408b9ce91ee846ed |
++------------------------------------------+
+1 row in set (0.00 sec)
+
+mysql> select sha("hello world");
++------------------------------------------+
+| sha(hello world)                         |
++------------------------------------------+
+| 2aae6c35c94fcfb415dbe95f408b9ce91ee846ed |
++------------------------------------------+
+1 row in set (0.00 sec)
+
+mysql> select sha1(null);
++------------+
+| sha1(null) |
++------------+
+| NULL       |
++------------+
+1 row in set (0.00 sec)
+```

docs/MatrixOne/Reference/Functions-and-Operators/matrixone-function-list.md

@@ -106,11 +106,13 @@
 | [LOWER()](./String/lower.md)                   | 用于将给定的字符串转换为小写形式。|
 | [LPAD()](./String/lpad.md)                     | 用于在字符串左侧填充。|
 | [LTRIM()](./String/ltrim.md)                   | 将输入字符串的前部空格去除，返回处理后的字符。|
+| [MD5()](./String/md5.md)                       | 将输入字符串生成一个 32 字符长的十六进制 MD5 哈希值。|
 | [OCT()](./String/oct.md)                       | 返回参数的八进制值的字符串|
 | [REPEAT()](./String/repeat.md)                 | 用于将输入的字符串重复 n 次，并返回一个新的字符串|
 | [REVERSE()](./String/reverse.md)               | 将 str 字符串中的字符顺序翻转输出。|
 | [RPAD()](./String/rpad.md)                     | 用于在字符串右侧填充|
 | [RTRIM()](./String/rtrim.md)                   | 将输入字符串的后方空格去除|
+| [SHA1()/SHA()](./String/sha1.md)               | 用于计算并返回给定字符串的 SHA-1 哈希值。|
 | [SHA2()](./String/sha2.md)                     | 返回输入字符串的 SHA2 哈希值。|
 | [SPACE()](./String/space.md)                   | 返回 N 个空格组成的字符串。|
 | [SPLIT_PART()](./String/split_part.md)         | 用于在给定的分隔符基础上将一个字符串分解成多个部分|

docs/MatrixOne/Reference/Operators/operators/cast-functions-and-operators/cast-functions-and-operators-overview.md

@@ -5,7 +5,5 @@
 | [BINARY()](binary.md) | 将值转换为二进制字符串的函数 |
 | [CAST()](cast.md) | 将值转换为特定类型，用于小数转数值和字符型 |
 | [CONVERT()](convert.md) | 将值转换为特定类型，用于日期和时间值、小数之间进行转换 |
-| [DECODE()](decode.md) | 将二进制数据解码为文本表示 |
-| [ENCODE()](encode.md) | 将二进制数据编码为文本表示 |
 | [SERIAL()](serial.md) | 将连接串序列化，不处理 NULL 值 |
 | [SERIAL_FULL()](serial_full.md) | 将连接串序列化，处理 NULL 值 |

mkdocs.yml

@@ -429,8 +429,6 @@ nav:
               - BINARY: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/binary.md
               - CAST: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/cast.md
               - CONVERT: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/convert.md
-              - DECODE: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/decode.md
-              - ENCODE: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/encode.md
               - SERIAL: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/serial.md
               - SERIAL_FULL: MatrixOne/Reference/Operators/operators/cast-functions-and-operators/serial_full.md
             - 比较函数和运算符:
@@ -557,11 +555,13 @@ nav:
             - LOWER(): MatrixOne/Reference/Functions-and-Operators/String/lower.md
             - LPAD(): MatrixOne/Reference/Functions-and-Operators/String/lpad.md
             - LTRIM(): MatrixOne/Reference/Functions-and-Operators/String/ltrim.md
+            - MD5(): MatrixOne/Reference/Functions-and-Operators/String/md5.md
             - OCT(): MatrixOne/Reference/Functions-and-Operators/String/oct.md
             - REPEAT(): MatrixOne/Reference/Functions-and-Operators/String/repeat.md
             - REVERSE(): MatrixOne/Reference/Functions-and-Operators/String/reverse.md
             - RPAD(): MatrixOne/Reference/Functions-and-Operators/String/rpad.md
             - RTRIM(): MatrixOne/Reference/Functions-and-Operators/String/rtrim.md
+            - SHA1()/SHA(): MatrixOne/Reference/Functions-and-Operators/String/sha1.md
             - SHA2(): MatrixOne/Reference/Functions-and-Operators/String/sha2.md
             - SPACE(): MatrixOne/Reference/Functions-and-Operators/String/space.md
             - SPLIT_PART(): MatrixOne/Reference/Functions-and-Operators/String/split_part.md