SET NOCOUNT ON
DECLARE @LogicalFileName sysname,
@MaxMinutes INT,
@NewSize INT
— *** MAKE SURE TO CHANGE THE NEXT 4 LINES WITH YOUR CRITERIA. ***
USE [YourDatabase] — This is the name of the database
— for which the log will be shrunk.
SELECT @LogicalFileName = ‘YourDatabase_Log’, — Use sp_helpfile to
— identify the logical file
— name that you want to shrink.
@MaxMinutes = 1, — Limit on time allowed to wrap log.
@NewSize = 50 — in MB

— Setup / initialize
DECLARE @OriginalSize int
SELECT @OriginalSize = size — in 8K pages
FROM sysfiles
WHERE name = @LogicalFileName
SELECT ‘Original Size of ‘ + db_name() + ‘ LOG is ‘ +
CONVERT(VARCHAR(30),@OriginalSize) + ‘ 8K pages or ‘ +
CONVERT(VARCHAR(30),(@OriginalSize*8/1024)) + ‘MB’
FROM sysfiles
WHERE name = @LogicalFileName

CREATE TABLE DummyTrans
(DummyColumn char (8000) not null)

— Wrap log and truncate it.
DECLARE @Counter INT,
@StartTime DATETIME,
@TruncLog VARCHAR(255)
SELECT @StartTime = GETDATE(),
@TruncLog = ‘BACKUP LOG ['+ db_name() + '] WITH TRUNCATE_ONLY’
— Try an initial shrink.
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) — the log has not shrunk
AND (@OriginalSize * 8 /1024) > @NewSize — The value passed in for new size is smaller than the current size.
BEGIN — Outer loop.
SELECT @Counter = 0
WHILE ((@Counter < @OriginalSize / 16) AND (@Counter < 50000))
BEGIN — update
INSERT DummyTrans VALUES (’Fill Log’) — Because it is a char field it inserts 8000 bytes.
DELETE DummyTrans
SELECT @Counter = @Counter + 1
END — update
EXEC (@TruncLog) — See if a trunc of the log shrinks it.
END — outer loop
SELECT ‘Final Size of ‘ + db_name() + ‘ LOG is ‘ +
CONVERT(VARCHAR(30),size) + ‘ 8K pages or ‘ +
CONVERT(VARCHAR(30),(size*8/1024)) + ‘MB’
FROM sysfiles
WHERE name = @LogicalFileName
DROP TABLE DummyTrans
PRINT ‘*** Perform a full database backup ***’
SET NOCOUNT OFF

Same way we have some expression BACKUP LOG WITH TRUNCATE_ONLY
which are builtin, so we are using them , I did the same.

Rana