Сохранить BLOB-поле в файл
01.01.2007
DECLARE @BufLen [int]
DECLARE @BufPos [int]
DECLARE @Buffer [varbinary](4096)
DECLARE @Stream [int]
DECLARE @HR [int]
SELECT @BufPos = 1, @BufLen = DATALENGTH(MyField) FROM MyTable WHERE SomeField=@SomeID
EXEC @HR = sp_OACreate 'ADODB.Stream',@Stream OUT
EXEC @HR = sp_OASetProperty @Stream,'Type',1
EXEC @HR = sp_OAMethod @Stream,'Open'
WHILE @BufLen > 0
BEGIN
SELECT @Buffer = SUBSTRING(MyField,@BufPos,4096) FROM MyTable WHERE SomeField=@SomeID
EXEC @HR = sp_OAMethod @Stream,'Write',null,@Buffer
SELECT @BufLen = @BufLen - 4096, @BufPos = @BufPos + 4096
END
EXEC @HR = sp_OAMethod @Stream, 'SaveToFile',Null,@Filename,2
EXEC @HR = sp_OAMethod @Stream, 'Close'
EXEC @HR = sp_OADestroy @Stream