Question

我的批处理文件将包含以下内容：

set MUSER=root
set MPASS=xprd123
set MHOST=172.33.49.55
set DB=DBName1
set MBIN=C:\Program Files\MySQL\MySQL Server 5.5\bin

set scriptpath=D:/Graph_draw/ASSET_Creation/EXTERNAL/MYSQL_STATS_COLLECTOR/foldrname1
"%MBIN%\mysql.exe" -u"%MUSER%" -p"%MPASS%" -h "%MHOST%" "%DB%" -e "set @2:='%scriptpath%'; source DBQuery1.sql;"

DBQuery1.sql的内容将是：

SELECT 'INNODB_OS_LOG_WRITTEN','QUESTIONS'
UNION
select MAX(IF(variable_name = 'INNODB_OS_LOG_WRITTEN', VARIABLE_VALUE, NULL)) 
AS INNODB_OS_LOG_WRITTEN, MAX(IF(variable_name = 'QUESTIONS', VARIABLE_VALUE, NULL)) 
AS QUESTIONS from information_schema.GLOBAL_STATUS INTO OUTFILE '@2/Stats.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';

我不确定这是将路径传递给DBQuery1.sql中的SELECT查询的方法。

此代码无效。

我得到的错误是：

ERROR 1 (HY000) at line 1 in file: 'DBQuery1.sql': Can't create/write to file 'C
:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.5\Data\
@2\Stats.csv' (Errcode: 2)

我查看了批量文件传递路径上的其他帖子，但无论我尝试过什么，我都无法解决这个问题。

当我执行批处理文件时，我不确定路径是否传递到sql文件中，如果是，为什么@ 2没有传递路径。

有人可以帮忙吗。

更新：

为了添加上面给出的细节，我发现传递的路径是在sql文件中接收的。

我打印了这样的变量输出：

**SELECT @2;**
SELECT 'INNODB_OS_LOG_WRITTEN','QUESTIONS' 
UNION 
select MAX(IF(variable_name = 'INNODB_OS_LOG_WRITTEN', VARIABLE_VALUE, NULL)) AS INNODB_OS_LOG_WRITTEN, 

MAX(IF(variable_name = 'QUESTIONS', VARIABLE_VALUE, NULL)) AS QUESTIONS 
from information_schema.GLOBAL_STATUS  
INTO OUTFILE '@2\Stats.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';

我得到的输出是：

+------------------------------------------------------------------------+
| @2                                                                     |
+------------------------------------------------------------------------+
| D:/Graph_draw/ASSET_Creation/EXTERNAL/MYSQL_STATS_COLLECTOR/foldrname1 |
+------------------------------------------------------------------------+
ERROR 1 (HY000) at line 2 in file: 'DBQuery1.sql': Can't create/write to file 'C
:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.5\Data\
@2\Stats.csv' (Errcode: 2)

这意味着@ 2没有获得'@ 2 \ Stats.csv'中的值，而是SELECT @ 2;在sql中获取值。

任何帮助？

Answer 1

问题是，正如您自己所指出的那样，用户定义的变量@ 2未在INTO OUTFILE的文件规范中扩展为其值。有一种解决方法，使用动态SQL：

SET @stmt = CONCAT(
    ' SELECT ''INNODB_OS_LOG_WRITTEN'',''QUESTIONS'''
,   ' UNION'
,   ' SELECT MAX(IF(variable_name = ''INNODB_OS_LOG_WRITTEN'', VARIABLE_VALUE, NULL)) AS INNODB_OS_LOG_WRITTEN'
,   ' ,      MAX(IF(variable_name = ''QUESTIONS'', VARIABLE_VALUE, NULL)) AS QUESTIONS'
,   ' FROM information_schema.GLOBAL_STATUS'
,   ' INTO OUTFILE ', @2, '/Stats.csv'
,   ' FIELDS TERMINATED BY '','''
,   ' ENCLOSED BY ''"'''
,   ' LINES TERMINATED BY ''\n'''
);
PREPARE stmt FROM @stmt;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

将路径从批处理文件传递到mysql

1 个答案: