File Exchange

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version (9.14 KB) by Joerg Buchholz
Exchange blobs (binary large objects) with MySQL databases

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Updated 09 Jan 2006

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MYBLOB_DEMO - Demonstrate the use of the MYBLOB tool kit
MYBLOB_OPEN - Open the connection to a MySQL database
MYBLOB_COMMAND - Send an SQL statement to a MySQL database
MYBLOB_FROM_DB - Retrieve a blob (binary large object) from a MySQL database
MYBLOB_TO_DB - Send a blob (binary large object) to a MySQL database
MYBLOB_CLOSE - Close the connection to the MySQL database

* Install MyODBC from
* Insert your own MySQL database parameters in myblob_demo.m
* Run myblob_demo

Cite As

Joerg Buchholz (2021). Myblob (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (11)


It Works very well, but i have some issues, i'm trying to store a text File. so what I need to change in this code?


When running myblob_command, i get the following error.

Error using COM.ADODB_Recordset/Open
Invoke Error, Dispatch Exception:
Source: ADODB.Recordset
Description: The connection cannot be used to perform this operation. It is either
closed or invalid in this context.
Help Context ID: 12ee52

I have not figured out a way to fix this


Pavel Mazniker

Selection and insertion from/to database work great with the uploaded functions! Thank you

Pavel Mazniker

what is command_text should be in myblob_to_db (ado_connection, table, column, where, file) function ?

Joseph Burgel

Nice. I was wondering if anybody has tried to write to a BLOB not from a file but directly from a Matlab matrix variable? Say, a 5x5 double matrix? Skip writing to a .mat and reading back out of the file to save time?

M Koelemay

Additionally, to allow this to work from 64-bit Matlab, install the 64-bit version of MSDASQL via a Microsoft hot fix (link below) and add "provider=MSDASQL" to the connection string


Hot fix:

Joerg Buchholz

@Lucy: Matlab 2008b seems to work with the MySQL ODBC 3.51 Driver and the MySQL ODBC 5.1 Driver. If you want to use the MySQL ODBC 5.1 Driver you have to change line 22 in myblob_open.m from
'driver=MySQL ODBC 3.51 Driver; ' ...
'driver=MySQL ODBC 5.1 Driver; ' ...

Lucy Matlab

using Matlab 2008a and MySql 5.0 for Win32:

??? Invoke Error, Dispatch Exception:
Source: Microsoft OLE DB Provider for ODBC Drivers
Description: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

Error in ==> myblob_open at 40

Error in ==> myblob_demo at 26
connection = myblob_open (user, password, server, database);

Brian McFee

Beware, this only seems to work on windows.

none none

nice, just what I was looking for.

Michael Ewens

Works well, even if you don't need blob capability.

MATLAB Release Compatibility
Created with R14SP3
Compatible with any release
Platform Compatibility
Windows macOS Linux

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