可以获取所有MySQL系统功能的列表吗？

Question

我看起来像：

SHOW FUNCTION STATUS 

获得的所有可用的系统功能列表当前服务器版本。直接从MySQL引擎获得像here这样的表是可行的吗？

谢谢！

Answer 1

如果您已经安装了帮助台（大多数二进制分发版做;有一个名为fill_help_tables.sql如果没有脚本），你可以输入：

mysql> HELP FUNCTIONS 
You asked for help about help category: "Functions" 
For more information, type 'help <item>', where <item> is one of the following 
topics: 
     PROCEDURE ANALYSE 
categories: 
    Bit Functions 
    Comparison operators 
    Control flow functions 
    Date and Time Functions 
    Encryption Functions 
    Information Functions 
    Logical operators 
    Miscellaneous Functions 
    Numeric Functions 
    String Functions 

...然后是这样的：

mysql> HELP String Functions 
You asked for help about help category: "String Functions" 
For more information, type 'help <item>', where <item> is one of the following 
topics: 
    ASCII 
    BIN 
    BINARY OPERATOR 
    BIT_LENGTH 
    CAST 
    CHAR FUNCTION 
... 

...最后才做这样的事情：

mysql> HELP bin 
Name: 'BIN' 
Description: 
Syntax: 
BIN(N) 

Returns a string representation of the binary value of N, where N is a 
.... 

如何生成您自己的列表！

下面的查询（在mysql数据库）提供了所有的功能和它们在一个列表类别：

SELECT help_category.name, help_topic.name 
FROM help_topic JOIN help_category 
    ON help_category.help_category_id = help_topic.help_category_id 
WHERE help_category.help_category_id IN (
    SELECT help_category_id FROM help_category 
    WHERE parent_category_id=37 
) ORDER BY 1; 

如果您想为每一个文字说明，只需添加description为一列在SELECT子句，尽管它很长，所以你可能想用\G而不是;