Extracting BLOB Into File System
May 1, 2014
I have read access to a database that appears to store files as "BLOBS".I am trying to create a VB macro that extracts the blob file to a location (lets say... my desktop) as an easy way of viewing the content of that file.
I am using Oracle SQL Developer with Read access to the database. The BLOBS can be located but I am unable to find a SQL string that will convert the blobs back into files located on my desktop.I can locate the blob in the database and obviously it appears appears as a text string. I have heard of two keywords: DBMS_LOB and UTL_File.I am not only new to databases but also new to storing files as strings in a database.
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May 21, 2008
Hey all
Is it possible to extract length(size) from an image?
Many thanks,
Rupa
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Aug 24, 2006
I have a zip file that requires a password to extract the file inside of it. Is there away to do this automatically? Can't find any software that does this.
Mike
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Apr 11, 2006
I use this code to get Tiff files from db , but output file seems to be corrupted :
Dim pubsConn As SqlConnection = New SqlConnection("Server=(local);uid=sa2;pwd=sony;database=pubs;") Dim logoCMD As SqlCommand = New SqlCommand("SELECT pub_id, logo FROM pub_info", pubsConn)
Dim fs As FileStream ' Writes the BLOB to a file (*.bmp). Dim bw As BinaryWriter ' Streams the binary data to the FileStream object.
Dim bufferSize As Integer = 100 ' The size of the BLOB buffer. Dim outbyte(bufferSize - 1) As Byte ' The BLOB byte() buffer to be filled by GetBytes. Dim retval As Long ' The bytes returned from GetBytes. Dim startIndex As Long = 0 ' The starting position in the BLOB output.
Dim pub_id As String = "" ' The publisher id to use in the file name.
' Open the connection and read data into the DataReader. pubsConn.Open() Dim myReader As SqlDataReader = logoCMD.ExecuteReader(CommandBehavior.SequentialAccess)
Do While myReader.Read() ' Get the publisher id, which must occur before getting the logo. pub_id = myReader.GetString(0) ' Create a file to hold the output. fs = New FileStream("\Server1shared1logo" & "KK" & ".tiff", FileMode.OpenOrCreate, FileAccess.Write) bw = New BinaryWriter(fs)
' Reset the starting byte for a new BLOB. startIndex = 0
' Read bytes into outbyte() and retain the number of bytes returned. retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize)
' Continue reading and writing while there are bytes beyond the size of the buffer. Do While retval = bufferSize bw.Write(outbyte) bw.Flush()
' Reposition the start index to the end of the last buffer and fill the buffer. startIndex += bufferSize retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize) Loop
' Write the remaining buffer. bw.Write(outbyte, 0, retval - 1) bw.Flush() ' Close the output file. bw.Close() fs.Close() Loop
' Close the reader and the connection. myReader.Close() pubsConn.Close()
Me.Div1.InnerHtml = ("<embed height=650 width=100% toolbar='' src= '" & "\Server1shared1logoKK.tiff" & "' type='application/x-alternatiff'>")
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Oct 22, 2013
I would like to extract a file from a database. The file is stored in a BLOB format
Can I extract the BLOB file from the database using an SQL code/command or is there another way in which I can extract the file?
The file is stored as a BLOB but is actually a ZIP file (if that makes any difference)
What is the normal method of extracting a BLOB file?
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Dec 4, 2007
I have an Excel 97 file that has a lot of data in it and I need to pull out pieces of that data. Here is one example of the data I have. It is in colum C in Excel.
Row Column C
1 11/25/07
2 12/01/07
3 week 1
4
5
6 9,708
7 128,353
8 -
9
10 42,691
11 3,000
12 183,751
13 $183,751
What I want to get out of this to put into a SQL table in one record is (I've included a header row here):
StartDate EndDate Week Value
11/22/07 12/1/07 1 183751
What is the best way to attach this? I have several other items I need to pull out of this Excel File, but if I can get this figured out I can adapt it to get the rest of what I want.
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Feb 1, 2008
Hi there,
I need to extract a attached file which is sent via email. I believe that I can do this via SSIS... but I would like to know how...
Could you kindly send me any idea about how can I do it?
Thank you, so much.
Luis Antonio
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May 20, 2015
I have a table in one of my databases that stores files in one of its columns. I need to be able to export this BLOB column into either a CSV or Excel file. I am forbidden from using xp_Cmdshell so I was wondering if there was a way to do this in the Cmd prompt.
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Aug 15, 2015
I was putting a database together (its a C# application MSSQL)  the application will handle a few hundred customers records and save  maybe a couple of thousand  word docs/images/other doc files wondered if the way to go was blob or filestream, I see the medium and larger databases seem to go for filestream but just wondered as not much mentioned about smaller dbs.I do not think  security/disk space/super fast access  will be a big issue.
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Sep 15, 2015
I would like to extract SQL server (event) log information into text file or DB tables so that we can read it with a script everyday.
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Oct 18, 2006
Hello,
I'm trying to import some data from a spreadsheet to a database table from a package in integration services. The problem is that I see the data when I open the excel file but when I try to run my package , it doesn't insert any rows in the table and it finishes with a success status.
My excel file has some formulas to get the data from other worksheets. I added a Data Viewer and all I see is null values in every cell.
I need help...does anyone know what's wrong?
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May 7, 2014
A little background on what I am trying to achieve first. We are moving to Azure virtual machines and we will have 8 disks on the SQL Server box. I am adding more files to the primary file group and each file will go on its own drive. I am then rebalancing data across these files by rebuilding all of the indexes on the tables which is working fine. No problems so far all is good.
I now have an additional problem. If there is a lob or blob column on the table, rebuilding the clustered index and all the non clustered indexes doesn't rebalance the blob or lob data across the disks such as it does with in row data.
I cannot find any articles on rebalancing lob or blob data because all the articles say to move to a new file group. I do not want a new file group, I just want to use the primary file group where the data already resides, and just redistribute it evenly in the same way that I can in row data which is working fine.
One solution I thought about was to BCP data out of the table, truncate the table and then BCP back into the table which I imagine would have the desired effect of distributing the data evenly over the files.
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Aug 1, 2006
We are debating what is industry “best practice� for serving huge numbers of images in an industrial scale website. More directly, which approach produces the best performance and the best scalability? For example, how do sites like ebay, Amazon, and other large sites handle the millions or billions of images they must deal with?
Store as BLOB in sql server?
Store in /images folder and store url text into sql server?
We always assumed that the second approach is what most sites must do. But do they?
One developer on our team maintains that storing one million or more image files in a directory will most certainly result in poor performance, because the server must scan the directory, searching for the correct file, each time a web request is made. The directory is not indexed (?) so performance must eventually suffer.
Other developer counters that storing millions of images as BLOBs into sql server will result in poor performance and HUGE database. An additional layer of access (webserver to sql server, back to webserver, then to client) causes a delay and performance hit.
Who is right? What do the gurus as the world class sites do?
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May 14, 2015
I'm copying files to a folder with the naming convention as follows in the source folder:
CM_ABC_MY_TEST.txt
In the destination folder, this filename needs to appear as:
CM_XYZ_MY_TEST.txt
In my File System Task, I'm pretty sure I'm going to need an expression with a replace, substring, etc. But am having a hard time nailing down the exact syntax.
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Aug 18, 2006
Does anyone know how to do this using variables? Everytime I try it, I get the
Error: Failed to lock variable for read access with error 0xc00100001.
I also tried it writing a script and still the same error. If I hard code the values into the variables it works fine but I will be running this everday so that it will pull in the current date along with the filename. So the value of the variables will change everyday. Here is my expression:
@[User::Variable] +(DT_WSTR,4) YEAR( GETDATE() )+"0"+(DT_WSTR,2) MONTH( GETDATE() ) + (DT_WSTR,2) DAY( GETDATE() )
The result:
C:Documents and SettingsmroushDesktopOSU20060818
the 20060818 part will change everyday ie.(tomorrow will be 20060819, next day 20060820 and so on.)
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Oct 9, 2006
I am having an issue with the File System Task.
I was wondering if there is a way to 'Move File' with the File System Task inside of a For Each Loop container but to dynamically set the Destination path variable.
Currently, this is what I have:
FileDestinationPath variable - set to C:TestFiles
FileSourcePath variable - set to C:TestFiles
FileNameAndLocation variable - set to blank
For Each Loop Container €“ Iterates through a folder C:TestFiles that has .txt files in it with dates in the file name. Ex: Test_09142006.txt. Sets the file path (fully qualified) to the Variable Mapping FileNameAndLocation.
Script Task (within For Each Loop, first step) €“ Sets the FileDestinationPath to the correct dated folder within C:TestFiles. For example, if the text files I want to move are for the 14th of September, it takes FileDestinationPath and appends the date folder to the end of it. The text files have a date in the file name (test_09142006.txt) and I am picking this apart (from FileNameAndLocation in the For Each Loop) to get the folder date. (dts.Variables(€œUser::FileDestinationPath€?).Value = dts.Variables(€œUser::FileDestinationPath€?).Value & €œ€? Month & €œ_€? & Day & €œ_€? & Year & €œ€?) which gives me €œC:TestFiles 9_14_2006€?.
File System Task (within For Each Loop, second step) €“ This is where the action is supposed to occur. I want it to take the FileDestinationPath and move the FileNameAndLocation file (from the For Loop) into this folder for each run.
Now as for my problem. I want this package to run everyday but it has to set the FileDestinationPath variable dynamically according to that day€™s date. Basically, how do I get this to work since I can€™t hard code the destination path variable from the start? I have the DestinationVariable on the File System Task set to the FileDestinationPath variable, after the script task builds it. However, using FileNameAndLocation as the SourceVariable on my File System Task tells me that the €œVariable €œFileNameAndLocation€? is used as a source or destination and is empty.€?
Let me know if I need to clarify further€¦...I may be missing something very simple. Any help would be greatly appreciated!
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Jun 8, 2007
I am able to run SSIS packages as SQL Server Agent jobs with a Control Flow items "File system task", if I move a file (test.txt) from a drive (c on the server (where SQL Agent jobs run) to a subdirectory on the same drive. But, if I try to move a file on a network drive, the package fail.
What I can do to solve this issue.
Bye!
Daniel
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Jun 19, 2015
Historically I've always written a VB script to copy a file from a sharepoint library. I don't like this method because I have to input a username & password in the script and maintain a config file.
Yesterday I was playing around with using a file system task. The sharepoint file has a UNC path so why not? I created a simple test package with a single file system task that copies the sharepoint file (addressed via UNC) to another network location. Package runs fine locally.
I try running on our utility server but am getting a "The file name [SHAREPOINT UNC PATH] specified in the connection was not valid" error. Package is running with a proxy on the server and the proxy account has the same permissions to the sharepoint site (so far as I can tell) as me.
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Sep 5, 2006
I have used the copy database wizard, but I realized I had forgotten to shrink the transaction log file. So I canceled the wizard. My database, detached by the wizard, has now disappeared. The mdf file is still there, but when I try to attach it manually I get the "create file encountered operating system error 5 while attempting to open the physical file..." error.
Any way I can recover it?
Thanks.
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Nov 9, 2015
I have created a File System task which is contained in a Foreach Loop Container. I have .bak files that are populating a directory from a maintenance backup plan.
There is a point where I need to delete the .bak file's after I've zipped them all up.
How do I set the SourceVariable to read through the directory and pick up just the .bak file's in the directory to delete.
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Jan 31, 2007
Hi,
I use the DTS 2000 Migration Wizard to migrate one of the DTS 2000 packages to SSIS. The migration failed with the following error message:
LogID=17
#Time=6:31 PM
#Level=DTSMW_LOGLEVEL_ERR
#Source=Microsoft.SqlServer.Dts.MigrationWizard.Framework.Framework
#Message=Microsoft.SqlServer.Dts.Runtime.DtsRuntimeException: Failed to save package file "C:Documents and SettingsfuMy DocumentsVisual Studio 2005ProjectsKORTONKORTONProcessCubesMF.dtsx" with error 0x80070002 "The system cannot find the file specified.".
---> System.Runtime.InteropServices.COMException (0xC001100E): Failed to save package file "C:Documents and SettingsfuMy DocumentsVisual Studio 2005ProjectsKORTONKORTONProcessCubesMF.dtsx" with error 0x80070002 "The system cannot find the file specified.".
at Microsoft.SqlServer.Dts.Runtime.Wrapper.ApplicationClass.SaveToXML(String FileName, IDTSPersist90 pPersistObj, IDTSEvents90 pEvents)
at Microsoft.SqlServer.Dts.Runtime.Application.SaveToXml(String fileName, Package package, IDTSEvents events)
--- End of inner exception stack trace ---
at Microsoft.SqlServer.Dts.Runtime.Application.SaveToXml(String fileName, Package package, IDTSEvents events)
at Microsoft.SqlServer.Dts.MigrationWizard.DTS9HelperUtility.DTS9Helper.SaveToXML(Package pkg, String sFileLocation)
at Microsoft.SqlServer.Dts.MigrationWizard.Framework.Framework.StartMigration(PackageInfo pInfo)
Looking at the call stack, it looks like COM wrapper fails on SaveToXML. Can someone tell me how I should workaround this problem?
Thanks,
Bobby Fu
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Dec 4, 2014
I am trying to create and later read a data file from a package deployed in SSISDB, but it is not reading it while it is successfully creating the file. The same package when run from the file system package, runs successfully. Generating ispac and deploying in SSISDB is running for infinite time. Is it a permission issue?
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Dec 21, 2006
Hi,
I am facing a problem on a server which has raid 5 solution (3 disks), the raid controller went down 2 of the disks were off in the Bios.
We added the 3 disks to a different server identical in brand and architecture, the raid controller was able to reconfigure the virtual drive H:.
All files were there, we installed sql server 2005 on the new server, but when we tried to attach the database we got the error below:
TITLE: Microsoft SQL Server Management Studio
------------------------------
Attach database failed for Server 'myserver'. (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.1399.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476
------------------------------
ADDITIONAL INFORMATION:
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The operating system returned error 38(Reached the end of the file.) to SQL Server during a read at offset 0x00000000af0000 in file 'C:Datamylog_log.LDF'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe system-level error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online.
Operating system error 38(Reached the end of the file.) on file "C:Datamylog_log.LDF" during ReadFileHdr.
Could not open new database 'mydb'. CREATE DATABASE is aborted. (Microsoft SQL Server, Error: 823)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=823&LinkId=20476
------------------------------
BUTTONS:
OK
------------------------------
I tried the following steps but it always failed:
- create a new db with the same name of the lost db;
- put the db in emergency mode;
- stop sql service and replace the mdf file;
- start sql service;
- Run Dbcc checkdb('mydb')
we got the error below:
Msg 945, Level 14, State 2, Line 1
Database 'ism0506' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details.
Any HELP please ?
Thanks,
Tarek Ghazali
Sql Server MVP
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Feb 7, 2007
Hi
This should be incredibly simple and easy, but I can't find any examples of how to do this.
I just want to make a File System Task move a file, and have the destination be filename + date and time. For example \serversharefilename02072007.txt
What syntax do I use in a variable to make this work?
Thanks
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Jun 29, 2015
Ok so I have some dynamic sql to delete a file that is created via sql earlier on. It is to provision a copy of a database to an instance on link server. Everything works great and the files used to delete. Now, with no code changes it is throwing a syntax error. I do a print of what the dynamic sql is creating before executing and then I copy / paste what was generated into command prompt and guess what!! The file deletes.
Here is the result on screen:
@DeleteBackupFileStatement: DEL adas16.clients.advance.localwip$AvionteAP_Template_893.bak /Q
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near ''.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near ''.
Here is the code that creates the statement:
SET @DeleteBackupFileStatement = NULL
BEGIN
SET @DeleteBackupFileStatement = 'DEL ' + LTRIM(RTRIM(@BackupFile)) + ' /Q'
END
PRINT '@DeleteBackupFileStatement: ' + cast(@DeleteBackupFileStatement as varchar(400))
BEGIN
EXEC adasdb.master.sys.Sp_executesql
@DeleteBackupFileStatement
END
END
The value of @BackupFile is simply the path of the file with the file name, everything in the prepared statement with the exception of DEL and the switch at the end.
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Jul 12, 2006
Hello
I want to move and rename a file and embed the date/time into it, so that each time the package runs a new file is created. For example MyFile_20060712_150000.doc.
Can someone give me a hint how to do this with the File Systen Task SSIS Control Flow Item?
Thanks for an early reply
Regards
Chaepp
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Feb 27, 2008
Hi All,
I have a source files folder where the files generated everyday.
My goal is pick the latest file and copy this single file to another folder.
I used the Foreach loop container and got the latest file and stored the file name to a varible i.e. LatestFile
Then i want to use the File System Task to copy this to the destination.
On the beginning, I could not setup the Latestfile since I don't its name then, so when I setup the Source Connection property of the File system task, it is not allowed to leave the SourceVarible as blank!
Any suggestion?
Thanks
Micor
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Jul 13, 2006
Could someone please instruct me on how to use the File System Task Editor to rename a file? I place control on control flow tab, change the operation to rename, from there I am not sure what to do.
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Jan 19, 2008
I have the following directories
\servershare
\serversharearchvie
I have a for each file loop and inside it a data flow that pulls from one of the flat files in the directory and then a file system task. If I choose the "Move File" option in the file system task to move the file to the archive directory, it fails with an access denied message. The access denied message occurs after a message saying file was successfully deleted. I am running this from BIDS right now and my local user can write delete etc in both the above directories. However, if I do a "copy file" in the file system task it seems to work. I think what is happening is it is deleting the file first and then trying to move it, but it no longer exists because it has been deleted--is this possible? Is this a bug of some sort?
For now I am going to workaround by putting in another file system task that deletes the files after they were copied and see how that goes, but would prefer just to do the "move" option.
Thanks,
Kayda
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May 10, 2006
I'm having trouble working this out in SSIS. I am trying to use a File System task to rename a file using an expression so that file.zip will be renamed to filemmyy.zip at the end of every month (for instance this month would be file0506.zip).
I am using the destination expression variable. But I'm not sure what to put for DestinationConnection. It seems to want a file name, but the file name is going to be variable, so I'm not sure what to put.
Any ideas?
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Mar 19, 2007
Hi there,
Can some one tell me how to rename the file Dynamically using file system Task.
I could able to rename the file and couldnt do it dynamical renaming.
Please let me know if anyone have an idea.
Thanks and Best Regards
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May 19, 2006
Hi All,
I am having a problem using the file system task, what I am trying to achieve is to move a file after it has been processed . I am using a For each loop container to process bunch of files but I want to remove the files that have been processed after every loop.To achieve this I added a File System Task after my data flow task and was using the same variable used in the for each loop container as my source variable but the package is not being validated and is gives the following error
"variable used as the source or the destination is empty"
Appreciate your help
Thanks
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