create table img(id integer primary key, image blob);
insert into img
value(1, load_file('C:\Users\User\Desktop\Image/imge.png'));
select * from img;
It's showing only the id column. The image column is null.
your path is not correct - last slash should also be a backslash
C:\Users\User\Desktop\Image\imge.png
also check:
the file must be located on the server host
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.
The character_set_filesystem system variable controls interpretation of file names that are given as literal strings (default value - binary). For systems on which multibyte file names are permitted, a different value may be more appropriate. For example, if the system represents file names using UTF-8, set character_set_filesystem to 'utf8'.
Related
when i tried to insert a image (for BLOB)into mysql database in workbench through load_file('c:\path..\iamge.jpg') it shows query is completed but image is not saved to database it show null value in image column
As mentioned in MySQL documentation for load_file():
“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 the server 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. (Prior to MySQL 8.0.17, the file must be readable by all, not just readable by the server.)
If the file does not exist or cannot be read because one of the preceding conditions is not satisfied, the function returns NULL.“
See: https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_load-file
Goal
Current goal is, to insert a file attachment into MySQL database as BLOB data from any network user. That can be from any folder - such as; Desktop.
Problem
This is the only path ---C:/ProgramData/MySQL/MySQL Server 8.0/Uploads--- that allows to use load_file() function in MySQL properly . If I try to use this path here: ---C:/Users/eduards/Desktop--- values show as null.
Working MySQL query
insert into document_control (fileattachment) values (load_file('C:/ProgramData/MySQL/MySQL Server 8.0/Uploads/test.docx'));
value shows as BLOB
Non-Working MySQL query
insert into document_control (fileattachment) values (load_file('C:/Users/eduards/Desktop/test.docx'));
value shows as null
Question
If I need to uninstall MySQL - I am happy to do so. But where can I allow or enable for any file attachments from any path to be inserted as BLOB not as null - into MySQL database?
As per the documentation:
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 the server 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. (Prior to MySQL 8.0.17, the file must be
readable by all, not just readable by the server.)
If the file does not exist or cannot be read because one of the
preceding conditions is not satisfied, the function returns NULL.
I am trying to insert an image into a MySQL database however I keep receiving this error;Error Code: 1048.
Column 'image' cannot be null. This is the code I am using.
create table test_img (
id int(10) not null AUTO_INCREMENT PRIMARY KEY,
name varchar(25) not null default '',
image blob not null
)
INSERT INTO test_img(ID,IMAGE) VALUES(1,LOAD_FILE ('C:\\human_centered_design_infographic.jpg'));
From the MySQL manual:
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.
You probably get the NULL error because one of those conditions mentioned is applicable.
It's not readable by all or the server does not have the file privilege enabled or the file is larger than max_allowed_packet bytes.
I have a table which has two columns: ID, FILE;
The FILE column has BLOB type;
I want to store the full file in the database not the content of the file.
I would like to download the file later as file_name.txt
This is how I tried but after insert the FILE is NULL;
query.exec("INSERT INTO test(ID, FILE) VALUES(1, LOAD_FILE('/home/nemeth/Documents/list.txt'));
According to
MySQL documentation on LOAD_FILE(), the file must satisfy some conditions to be loaded. Not only being local but also permissions and stuff.
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.
The character_set_filesystem system variable controls interpretation
of file names that are given as literal strings.
Also have you tried searching a little?... Lookie here :p
I could not figure out what is the problem so I solved differently.
I've read the file into a QByteArray and inserted the array into the database.
QByteArray byteArray = file.readAll();
QSqlQuery query;
query.prepare("INSERT INTO TEST_TABLE(ID, FILE) VALUES (1,?)");
query.addBindValue(byteArray);
query.exec();
I tried to insert a text file into my database, using this code:
INSERT INTO test.table (url_address, html)
VALUES ('abc', LOAD_FILE('C:\Documents and Settings\eran\Desktop\1.txt'));
However, I get null in the html column. How can I get the data from the text file to my database?
MySQL LOAD_FILE() reads the file and returns the file contents as a string.
To use this function, the file must be located on the host server, user must specify the full path name of the file, and user must have the FILE privilege. The file must be readable and size must be less than max_allowed_packet (set in the my.ini file) bytes. It returns NULL if the file does not exist or can’t be read.
Try using double back slash "\" for the path. I do not know if it will work.
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_load-file
http://www.w3resource.com/mysql/string-functions/mysql-load_file-function.php