I want to store images and .docx/.doc, .pptx/.ppt, .pdf files using the front end of my software. I don\'t understand how to implement this and how to insert the BLOB and CL
Or you could merely use the MySQL Workbench, select the rows, last rows, insert a row without the blob, then just right click and select "Load Value From File".
for those People who are getting "Column 'image' cannot be null" error while saving Blob through query :-
Open your MySql Command Line Client and login with root user and type
mysql> SHOW VARIABLES LIKE "secure_file_priv";
this will show you the secure path used by MySql to access the files. something like
+------------------+-----------------------+
| Variable_name | Value |
+------------------+-----------------------+
| secure_file_priv | /var/lib/mysql-files/ |
+------------------+-----------------------+
you can either paste files inside this folder or change the "secure_file_priv" variable value to "empty string" so that it can read file from anywhere.
INSERT INTO MY_TABLE(id, blob_col) VALUES(1, LOAD_FILE('/full/path/to/file/myfile.png')
LOAD_FILE has many conditions attached to it. From the MySQL documentation:
LOAD_FILE(file_name)
Reads the file and returns the file contents as a string. To use this function, the file must be located on the server host, you must specify the full path name to the file, and you must have the FILE privilege. The file must be readable by all and its size less than max_allowed_packet bytes. If the secure_file_priv system variable is set to a nonempty directory name, the file to be loaded must be located in that directory.
If the file does not exist or cannot be read because one of the preceding conditions is not satisfied, the function returns NULL.
Also, there there are bugs with LOAD_FILE in Linux. See http://bugs.mysql.com/bug.php?id=38403 for the bug, and MySQL LOAD_FILE returning NULL for workarounds. On Ubuntu 12.04, MySQL 5.5.32, this works for me:
chown mysql:mysql /tmp/yourfile
If you are using mysql workbench, just right click on the field (cell) and select 'load value from file' option and then browse to the file and click open and then click on apply. It will automatically generate query like this
UPDATE `dbname`.`tablename` SET `columnname` = ? WHERE (`row` = '1');
INSERT INTO table1 VALUES(1, LOAD_FILE(data.png));
won't work but
INSERT INTO table1 VALUES(1, LOAD_FILE('data.png'));
should (assuming data.png exists in the local directory)
Two ways:
1 - Use a LOAD_FILE function -
INSERT INTO table1 VALUES(1, LOAD_FILE('data.png'));
2 - Insert file as hex string, e.g. -
INSERT INTO table1 VALUES
(1, x'89504E470D0A1A0A0000000D494844520000001000000010080200000090916836000000017352474200AECE1CE90000000467414D410000B18F0BFC6105000000097048597300000EC300000EC301C76FA8640000001E49444154384F6350DAE843126220493550F1A80662426C349406472801006AC91F1040F796BD0000000049454E44AE426082');