操作环境Windows Advanced Server 英文版 + spSQL Server 英文企业版+sp
任务描述
我有一个数据库名称为Cisi它的数据库日志的名称为Cisi_log
这个日志的大小为M现在我要把它截断令其收缩为M
操作如下
在查询分析器里面用sa登录然后执行下列语句
Prog: Xinsoft
Time: :
SET NOCOUNT ON
DECLARE @LogicalFileName sysname
@MaxMinutes INT
@NewSize INT
USE Cisi 要操作的数据库名
SELECT@LogicalFileName = Cisi_log 日志文件名
@MaxMinutes = Limit on time allowed to wrap log
@NewSize = 你想设定的日志文件的大小(M)
Setup / initialize
DECLARE @OriginalSize int
SELECT @OriginalSize = size
FROM sysfiles
WHERE name = @LogicalFileName
SELECT Original Size of + db_name() + LOG is +
CONVERT(VARCHAR()@OriginalSize) + K pages or +
CONVERT(VARCHAR()(@OriginalSize*/)) + MB
FROM sysfiles
WHERE name = @LogicalFileName
Drop TABLE DummyTrans
CREATE TABLE DummyTrans
(DummyColumn char () not null)
DECLARE @Counter INT
@StartTime DATETIME
@TruncLogVARCHAR()
SELECT@StartTime = GETDATE()
@TruncLog = BACKUP LOG + db_name() + WITH TRUNCATE_ONLY
DBCC SHRINKFILE (@LogicalFileName @NewSize)
EXEC (@TruncLog)
Wrap the log if necessary
WHILE @MaxMinutes > DATEDIFF (mi @StartTime GETDATE()) time has not expired
AND @OriginalSize = (SELECT size FROM sysfiles WHERE name =
@LogicalFileName)
AND (@OriginalSize * /) > @NewSize
BEGIN Outer loop
SELECT @Counter =
WHILE((@Counter < @OriginalSize / ) AND (@Counter < ))
BEGIN update
INSERT DummyTrans valueS (Fill Log)
DELETE DummyTrans
SELECT @Counter = @Counter +
END
EXEC (@TruncLog)
END
SELECT Final Size of + db_name() + LOG is +
CONVERT(VARCHAR()size) + K pages or +
CONVERT(VARCHAR()(size*/)) + MB
FROM sysfiles
WHERE name = @LogicalFileName
DROP TABLE DummyTrans
SET NOCOUNT OFF
执行结果
Original Size of Cisi LOG is K pages or MB
Final Size of Cisi LOG is K pages or MB
数据库日志已成功地收缩为M
