将MySQL模式转换为Github Wiki？?mysql

该代码相当长。我道歉。它由两个存储过程组成。您可能会满意只运行第一个。第二个使用第一个的输出（表中第一个左的数据）。您可能还希望将代码合并为一个。但是我将它们分开。第二个存储的proc产生类似于的输出describe myTable。但是它将对您需要此类输出的数据库中的所有表执行该操作。

通过为数据库传递要报告的参数（字符串）来使用它。

我创建了一个单独的数据库，并且代码按名称显式引用了该数据库中的表。因此，如果您EXECUTE对此存储过程有特权，则可以从任何当前数据库中运行它。因此，作为一个简单的测试，不要将报告数据库设置为当前数据库，而只需按名称（使用报告数据库名称限定）来调用存储过程。这全部显示在下面的测试块中。

两种存储过程 CREATE SCHEMA Reporting101a; -- See Note1

DROP PROCEDURE IF EXISTS Reporting101a.describeTables_v2a; DELIMITER $$ CREATE DEFINER=root@localhost PROCEDURE Reporting101a.describeTables_v2a( IN dbName varchar(100), -- the dbname to report table structures OUT theSession int, -- OUT parameter for session# assigned IN deleteSessionRows BOOL, -- true for delete rows when done from main reporting table for this session# IN callTheSecondStoredProc BOOL -- TRUE = output is from Pretty output in Second Stored Proc. FALSE= not so pretty output ) BEGIN DECLARE thisTable CHAR(100);

DROP TEMPORARY TABLE IF EXISTS Reporting101a.tOutput;
CREATE TEMPORARY TABLE Reporting101a.tOutput
(   id int auto_increment primary key,
    tblName varchar(100) not null,
    ordVal int not null,
    cField varchar(100) not null,
    cType varchar(100) not null,
    cNull varchar(100) not null,
    cKey varchar(100) not null,
    cDefault varchar(100) null,
    cExtra varchar(100) null
);
DROP TEMPORARY TABLE IF EXISTS Reporting101a.tOutput2;
CREATE TEMPORARY TABLE Reporting101a.tOutput2
(   tblName varchar(100) primary key,
    colCount int not null,
    cFieldMaxLen int not null,
    cTypeMaxLen int not null,
    cNullMaxLen int not null,
    cKeyMaxLen int not null,
    cDefaultMaxLen int not null,
    cExtraMaxLen int not null
);

INSERT Reporting101a.tOutput(tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra)
SELECT TABLE_NAME,ORDINAL_POSITION,COLUMN_NAME AS Field, COLUMN_TYPE AS TYPE, RPAD(IS_NULLABLE,4,' ') AS 'Null', 
RPAD(COLUMN_KEY,3,' ') AS 'Key',RPAD(COLUMN_DEFAULT,7,' ') AS 'DEFAULT',EXTRA AS Extra
FROM information_schema.columns WHERE table_schema = dbName ORDER BY table_name,ordinal_position; 
-- select * from information_schema.columns WHERE table_schema = '57security' order by table_name,ordinal_position; 

UPDATE Reporting101a.tOutput
SET cExtra='     '
WHERE cExtra='';

UPDATE Reporting101a.tOutput
SET cField=RPAD(cField,5,' ')
WHERE LENGTH(cField)<5;

INSERT Reporting101a.tOutput2(tblName,colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen)
SELECT tblName,COUNT(*),0,0,0,0,0,0 
FROM Reporting101a.tOutput 
GROUP BY tblName;

UPDATE tOutput2 t2
JOIN
(   SELECT tblName,MAX(LENGTH(cField)) AS mField,MAX(LENGTH(cType)) AS mType,MAX(LENGTH(cNull)) AS mNull,
    IFNULL(MAX(LENGTH(cKey)),0) AS mKey,IFNULL(MAX(LENGTH(cDefault)),0) AS mDefault,IFNULL(MAX(LENGTH(cExtra)),0) AS mExtra
    FROM Reporting101a.tOutput
    GROUP BY tblName
) x
ON x.tblName=t2.tblName
SET t2.cFieldMaxLen=x.mField,t2.cTypeMaxLen=x.mType,cNullMaxLen=x.mNull,
cKeyMaxLen=x.mKey,cDefaultMaxLen=x.mDefault,cExtraMaxLen=x.mExtra;

-- DROP TABLE Reporting101a.reportDataDefsSession; -- useful for quick change of structure of table
-- note, keep above drop call remmed out ! Just use it for quick tweaks to structure
CREATE TABLE IF NOT EXISTS Reporting101a.reportDataDefsSession
(   -- for the sole purpose of safe session auto_inc usage
    -- Please don't delete unless you want the sessions to experience aberant behavior
    sessionId INT AUTO_INCREMENT PRIMARY KEY,
    dummy CHAR(1) NOT NULL,
    creationDT datetime not null
);

CREATE TABLE IF NOT EXISTS Reporting101a.reportDataDefs
(   sessionId INT NOT NULL,
    tblName VARCHAR(100) NOT NULL,  -- Tablename
    ordVal INT NOT NULL,    -- the "position number" of the Column
    cField VARCHAR(100) NOT NULL,   -- The Column
    cType VARCHAR(100) NOT NULL,    -- Datatype
    cNull VARCHAR(100) NOT NULL,    -- Nullability
    cKey VARCHAR(100) NOT NULL, -- Key info
    cDefault VARCHAR(100) NULL, -- Default value
    cExtra VARCHAR(100) NULL,   -- Extra output
    colCount INT NOT NULL,  -- the columns here and below are de-normalize data
    cFieldMaxLen INT NOT NULL,
    cTypeMaxLen INT NOT NULL,
    cNullMaxLen INT NOT NULL,
    cKeyMaxLen INT NOT NULL,
    cDefaultMaxLen INT NOT NULL,
    cExtraMaxLen INT NOT NULL
);

-- For lack of a better notion, we are calling calls "sessions". The programmer calls the
-- First Stored Proc, and we call that a session after we get a unique next incrementing number.
-- That number is the session #. House all output with that as a column value. This allows us to 
-- move between stored procs, have safe output, have historical snapshots, and retain the data 
-- via a session # for later use, whatever use.
INSERT Reporting101a.reportDataDefsSession(dummy,creationDT) VALUES ('X',now());
SET @mySession=LAST_INSERT_ID(); -- there it is, our session # (read the above paragraph)

INSERT Reporting101a.reportDataDefs(sessionId,tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra,
colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen)    
SELECT @mySession,t1.tblName,t1.ordVal,t1.cField,t1.cType,t1.cNull,t1.cKey,t1.cDefault,t1.cExtra,
t2.colCount,t2.cFieldMaxLen,t2.cTypeMaxLen,t2.cNullMaxLen,t2.cKeyMaxLen,t2.cDefaultMaxLen,t2.cExtraMaxLen 
FROM Reporting101a.tOutput t1
JOIN Reporting101a.tOutput2 t2
ON t2.tblName=t1.tblName
ORDER BY t1.tblName,t1.id;

DROP TEMPORARY TABLE Reporting101a.tOutput;
DROP TEMPORARY TABLE Reporting101a.tOutput2;
SET theSession=@mySession; -- the OUT var that came in as a parameter

-- ***************************************************************************
-- ***************************************************************************
-- Label "Some_Sort_of_Output":
IF callTheSecondStoredProc=TRUE THEN
    -- The caller says to call the second stored proc (for Pretty Printing)
    -- This will generate output similar to `DESCRIBE myTable`
    -- But remember, it will do it  for EVERY table in referenced database
    CALL Reporting101a.`Print_Tables_Like_Describe`(@mySession);
    -- The above call just gave you output.
ELSE
    -- The caller chose to not auto call the Pretty Printing second stored procedure.
    -- Note, the caller can easily call it right after using the OUT parameter.
    -- So our output will be a resultset of out reportDataDefs table for this session #
    SELECT * 
    FROM Reporting101a.reportDataDefs 
    WHERE sessionId=@mySession
    ORDER BY tblName,ordVal;
END IF;
-- ***************************************************************************
-- ***************************************************************************

IF deleteSessionRows=TRUE THEN
    -- The caller says output rows are NOT needed at this point. Delete them.
    -- Note, if this boolean comes in TRUE, you can't call Pretty Printing
    -- second stored procedure with the session # because the data is gone.
    --
    -- Regardless, you are getting something back from "Some_Sort_of_Output" above.
    DELETE FROM Reporting101a.reportDataDefs
    WHERE sessionId=@mySession;
END IF;

END$$ DELIMITER ;

DROP PROCEDURE IF EXISTS Reporting101a.Print_Tables_Like_Describe; DELIMITER $$ CREATE DEFINER=root@localhost PROCEDURE Reporting101a.Print_Tables_Like_Describe( pSessionId INT ) BEGIN DECLARE done INT DEFAULT FALSE; DECLARE curTable VARCHAR(100) DEFAULT ''; DECLARE bFirst BOOL DEFAULT TRUE;

DECLARE lv_tblName,lv_cField,lv_cType,lv_cNull,lv_cKey,lv_cDefault,lv_cExtra VARCHAR(100);
DECLARE lv_ordVal,lv_colCount,lv_cFieldMaxLen,lv_cTypeMaxLen,lv_cNullMaxLen,lv_cKeyMaxLen,lv_cDefaultMaxLen,lv_cExtraMaxLen INT;

DECLARE cur1 CURSOR FOR SELECT tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra,
colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen 
FROM Reporting101a.reportDataDefs
WHERE sessionId=pSessionId
ORDER BY tblName,ordVal;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

-- Please note in the above, CURSOR stuff must come last else "Error 1337: Variable or condition decl aft curs" 

CREATE TABLE IF NOT EXISTS Reporting101a.reportOutput
(   lineNum INT AUTO_INCREMENT PRIMARY KEY,
    sessionId INT NOT NULL,
    lineOut varchar(100) NOT NULL
);

-- INSERT Reporting101a.reportOutput(sessionId,lineOut)
-- SELECT 
-- SET curTable='';
DELETE FROM Reporting101a.reportOutput
WHERE sessionId=pSessionId;

OPEN cur1;

read_loop: LOOP
    FETCH cur1 INTO lv_tblName,lv_ordVal,lv_cField,lv_cType,lv_cNull,lv_cKey,lv_cDefault,lv_cExtra,
        lv_colCount,lv_cFieldMaxLen,lv_cTypeMaxLen,lv_cNullMaxLen,lv_cKeyMaxLen,lv_cDefaultMaxLen,lv_cExtraMaxLen ;
    IF done THEN
        LEAVE read_loop;
    END IF;
    IF lv_tblName<>curTable THEN
        IF bFirst=FALSE THEN
            INSERT Reporting101a.reportOutput(sessionId,lineOut)
            SELECT pSessionId,'';
        ELSE
            SET bFirst=FALSE;
        END IF;
        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,lv_tblName;
        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,CONCAT('+-', 
            REPEAT('-',GREATEST(5,lv_cFieldMaxLen)),  '-+-',
            REPEAT('-',GREATEST(4,lv_cTypeMaxLen)), '-+-',
            REPEAT('-',GREATEST(4,lv_cNullMaxLen)), '-+-',
            REPEAT('-',GREATEST(3,lv_cKeyMaxLen)),  '-+-',
            REPEAT('-',GREATEST(7,lv_cDefaultMaxLen)),  '-+-',
            REPEAT('-',GREATEST(5,lv_cExtraMaxLen)),    '-+');

        SET @dashLineNumRow=LAST_INSERT_ID();

        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,CONCAT('| ', 
            'Field',
            REPEAT(' ',GREATEST(0,lv_cFieldMaxLen-5)),  ' | ',
            'Type',
            REPEAT(' ',GREATEST(0,lv_cTypeMaxLen-4)),   ' | ',
            'Null',
            REPEAT(' ',GREATEST(0,lv_cNullMaxLen-4)),   ' | ',
            'Key',
            REPEAT(' ',GREATEST(0,lv_cKeyMaxLen-3)),    ' | ',
            'Default',
            REPEAT(' ',GREATEST(0,lv_cDefaultMaxLen-7)),    ' | ',
            'Extra',
            REPEAT(' ',GREATEST(0,lv_cExtraMaxLen-5)),  ' |');

        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,lineOut
        FROM Reporting101a.reportOutput
        WHERE lineNum=@dashLineNumRow;

        -- SELECT * FROM Reporting101a.reportDataDefs WHERE sessionId=24;
        SET curTable=lv_tblName;
    END IF;
    INSERT Reporting101a.reportOutput(sessionId,lineOut)
    SELECT pSessionId,
        CONCAT('| ', 
        COALESCE(lv_cField,''),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cFieldMaxLen-LENGTH(lv_cField))),''),' | ',
        COALESCE(lv_cType,''),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cTypeMaxLen-LENGTH(lv_cType))),''),' | ',
        COALESCE(lv_cNull,''),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cNullMaxLen-LENGTH(lv_cNull))),''),' | ',
        COALESCE(lv_cKey,'   '),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cKeyMaxLen-LENGTH(lv_cKey))),''),' | ',
        COALESCE(lv_cDefault,'       '),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cDefaultMaxLen-LENGTH(lv_cDefault))),''),' | ',
        COALESCE(lv_cExtra,'     '),
        COALESCE(REPEAT(' ',GREATEST(0,lv_cExtraMaxLen-LENGTH(lv_cExtra))),''),' |');
    INSERT Reporting101a.reportOutput(sessionId,lineOut)
    SELECT pSessionId,lineOut
    FROM Reporting101a.reportOutput
    WHERE lineNum=@dashLineNumRow;
END LOOP;
CLOSE cur1;

select lineOut as '' from Reporting101a.reportOutput where sessionId=pSessionId order by lineNum;

END$$ DELIMITER ; 测试 测试：

-- See Note2 SET @theOutVar =-1; -- A variable used as the OUT variable below

-- See Note3 -- Note: with TRUE as the 4th parameter, this is a one call deal. Meaning, you are done. call Reporting101a.describeTables_v2a('stackoverflow',@theOutVar,false,true);

-- See Note4 -- Primarily used if the 4th parameter above is false call Reporting101a.Print_Tables_Like_Describe(@theOutVar); -- loads data for prettier results in chunk format. 输出量 +--------------------------------------------------------------------------------------------+ | | +--------------------------------------------------------------------------------------------+ | course | | +------------+--------------+------+-----+---------+----------------+ | | | Field | Type | Null | Key | Default | Extra | | | +------------+--------------+------+-----+---------+----------------+ | | | courseId | int(11) | NO | PRI | | auto_increment | | | +------------+--------------+------+-----+---------+----------------+ | | | deptId | int(11) | NO | MUL | | | | | +------------+--------------+------+-----+---------+----------------+ | | | courseName | varchar(100) | NO | | | | | | +------------+--------------+------+-----+---------+----------------+ | | | | dept | | +----------+--------------+------+-----+---------+----------------+ | | | Field | Type | Null | Key | Default | Extra | | | +----------+--------------+------+-----+---------+----------------+ | | | deptId | int(11) | NO | PRI | | auto_increment | | | +----------+--------------+------+-----+---------+----------------+ | | | deptName | varchar(100) | NO | | | | | | +----------+--------------+------+-----+---------+----------------+ | | | | scjunction | | +------------+---------+------+-----+---------+----------------+ | | | Field | Type | Null | Key | Default | Extra | | | +------------+---------+------+-----+---------+----------------+ | | | id | int(11) | NO | PRI | | auto_increment | | | +------------+---------+------+-----+---------+----------------+ | | | studentId | int(11) | NO | MUL | | | | | +------------+---------+------+-----+---------+----------------+ | | | courseId | int(11) | NO | MUL | | | | | +------------+---------+------+-----+---------+----------------+ | | | term | int(11) | NO | | | | | | +------------+---------+------+-----+---------+----------------+ | | | attendance | int(11) | NO | | | | | | +------------+---------+------+-----+---------+----------------+ | | | grade | int(11) | NO | | | | | | +------------+---------+------+-----+---------+----------------+ | | | | student | | +-----------+--------------+------+-----+---------+----------------+ | | | Field | Type | Null | Key | Default | Extra | | | +-----------+--------------+------+-----+---------+----------------+ | | | studentId | int(11) | NO | PRI | | auto_increment | | | +-----------+--------------+------+-----+---------+----------------+ | | | fullName | varchar(100) | NO | | | | | | +-----------+--------------+------+-----+---------+----------------+ | | | | testtable | | +-----------------------------------------+---------------+------+-----+---------+-------+ | | | Field | Type | Null | Key | Default | Extra | | | +-----------------------------------------+---------------+------+-----+---------+-------+ | | | noPKhere | int(11) | NO | | | | | | +-----------------------------------------+---------------+------+-----+---------+-------+ | | | veryLongColumnName_And_Then.Some_%_More | decimal(12,2) | YES | | | | | | +-----------------------------------------+---------------+------+-----+---------+-------+ | | | limit | int(11) | NO | | | | | | +-----------------------------------------+---------------+------+-----+---------+-------+ | | | | testtable2 | | +-------+---------+------+-----+---------+-------+ | | | Field | Type | Null | Key | Default | Extra | | | +-------+---------+------+-----+---------+-------+ | | | id | int(11) | NO | PRI | | | | | +-------+---------+------+-----+---------+-------+ | +--------------------------------------------------------------------------------------------+ 注意1：将Reporting101a创建一个名为的数据库来容纳两个存储过程和一些支持表。这些例程通过调用存储过程来开始，该存储过程引用要使用字符串报告的数据库。

通过专用INFORMATION_SCHEMA数据库以只读安全方式访问产生输出的数据。这样，不会影响正在报告的数据库。

此数据库中保留了三个非临时表。

reportDataDefsSession -用于获取会话的简单表格＃ reportDataDefs-数据返回INFORMATION_SCHEMA并进行了一些处理。它是基于会话的。 reportOutput-用于MySQL的打印打印的表DESCRIBE。它只是用于将输出放在一起的表。它是基于会话的。 注意2：此INT变量作为OUT参数目标包括在内，已写入其中，并允许您在First存储过程准备好数据之后插入其他代码。它代表一个会话＃，该会话隔离输出以供以后报告。

某些环境（例如PHP）具有某些技巧，这些技巧使某些程序员无法理解。因此，如果您需要自己组合两个存储过程，则可以这样做（或者如果您感到困惑，请分别询问我）。

无论如何，它显示了数据或工作如何将存储过程调用链接在一起。

坦白地说，我使用会话＃作为OUT参数的主要原因之一是，我知道我必须创建一个CURSOR才能获得漂亮的输出。并且这需要Cursor DECLARE在第二个存储过程的顶部。并且DECLAREs必须出现在存储过程的顶部。所以双手合十，我走了这条路。

注意3：这是对第一个存储过程的调用。很有可能在此调用之后将TRUE作为第4个参数来完成操作。存储过程在其中非常有据可查。第三个参数用于确定是否要从会话号的报告表中删除数据。删除发生在任何输出作为结果集之后。因此，这取决于您的选择。

参数：

描述所有表的数据库名称，例如 describe myTable INT OUT用来保存会话的参数 布尔值：是否要在最后从报表中删除数据 布尔值：我们是否应该自动调用生成describe类似输出的漂亮打印存储过程。如果您决定将参数4传递为FALSE，那么您的输出可能类似于以下内容： 在此处输入图片说明

注意4：在需要不同输出但希望使用会话编号的情况下使用。您通常不需要这个。来源：stack overflow