将BLOB值插入MySQL数据库 [英] Insert a BLOB value into MySQL database

问题描述

我有一个MYSQL数据库，其列名为BLOB类型的img.

I have a MYSQL database with a column named img of BLOB type.

当我像这样在该列中插入一个值时:

When I insert a value into that column like this :

LOAD_FILE('C:/Documents and Settings/All Users/Documents/My Pictures/Sample Pictures/Sunset.jpg') 

有效！

但是这样:

LOAD_FILE('C:/Documents and Settings/Administrator/My Documents/My Pictures/picture.jpg')

它不起作用，它告诉我列img不能为空！

it doesn't work and it tells me that the column img cannot be null !

在这两种情况下，文件都存在，并且我以root用户(所有特权)连接到数据库，所以我不明白为什么会收到此错误.

And in both cases the file exists, and I'm connecting to the database as the root user (all privileges), so I don't understand why I'm getting this error.

预先感谢

推荐答案

也许 max_allowed_pa​​cket

1.jpg是小图片，而2.jpg是大图片

1.jpg is a small picture and 2.jpg is a big picture

mysql> DESCRIBE  blob_files;
+-------+---------+------+-----+---------+----------------+
| Field | Type    | Null | Key | Default | Extra          |
+-------+---------+------+-----+---------+----------------+
| id    | int(11) | NO   | PRI | NULL    | auto_increment |
| file  | blob    | YES  |     | NULL    |                |
+-------+---------+------+-----+---------+----------------+
2 rows in set (0.01 sec)

mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/2.jpg'));
Query OK, 1 row affected, 1 warning (0.00 sec)

mysql> SHOW WARNINGS;
+---------+------+--------------------------------------------------------------
------------------+
| Level   | Code | Message
                  |
+---------+------+--------------------------------------------------------------
------------------+
| Warning | 1301 | Result of load_file() was larger than max_allowed_packet (104
8576) - truncated |
+---------+------+--------------------------------------------------------------
------------------+
1 row in set (0.00 sec)

mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/1.jpg'));
Query OK, 1 row affected (0.05 sec)

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