MYSQL导入大数据命令load data infile load data local infile区别 - TOMMYHU - 专注互联网开发及运营技术,提供相关资料及软件下载,奇趣网络时事评论!
Feb 1

MYSQL导入大数据命令load data infile load data local infile区别 不指定

tommyhu , 20:48 , DBA » MYSQL , Comments(0) , Trackbacks(0) , Reads(2038) , Via Original Large | Medium | Small
MYSQL导入大数据命令load data infile load data local infile区别:
命令:load data local infile “filename.txt” into table tbl_name;
说明:MySQl的版本不得低于3.22.15,否则load data local不起作用。
In MySQL 3.23.49 and MySQL 4.0.2, we added some new options to deal with possible security issues when it comes to LOAD DATA LOCAL.
There are two possible problems with supporting this command:
As the reading of the file is initiated from the server, one could theoretically create a patched MySQL server that could read any file on the client machine that the current user has read access to, when the client issues a query against the table.
In a web environment where the clients are connecting from a web server, a user could use LOAD DATA LOCAL to read any files that the web server process has read access to (assuming a user could run any command against the SQL server).
There are two separate fixes for this:
If you don't configure MySQL with --enable-local-infile, then LOAD DATA LOCAL will be disabled by all clients, unless one calls mysql_options(... MYSQL_OPT_LOCAL_INFILE, 0) in the client. See section mysql_options().
For the mysql command-line client, LOAD DATA LOCAL can be enabled by specifying the option --local-infile[=1], or disabled with --local-infile=0.
By default, all MySQL clients and libraries are compiled with --enable-local-infile, to be compatible with MySQL 3.23.48 and before.
One can disable all LOAD DATA LOCAL commands in the MySQL server by starting mysqld with --local-infile=0.
In the case that LOAD DATA LOCAL INFILE is disabled in the server or the client, you will get the error message (1148):
The used command is not allowed with this MySQL version

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