如何恢复 magento数据库

The Magento database makes use of foreign key constraints to ensure
database integrity. As an example, if a category is deleted, all
categories below it in the category tree must be deleted too.

If
you make a backup of your Magento database using the built-in backup
function (Admin > System > Tools > Backup), Magento inserts
special statements in the .sql file to avoid foreign key checks when
the tables are restored.

If you backup your Magento database
using other tools, like phpMyAdmin or Navicat, these special statements
will be missing. When you attempt to run the .sql file, you will get
errors like these:

Cannot add or update a child row: a foreign key constraint fails

This
error occurs because the data you are importing is provided table by
table, row by row, without regard to the logical structure and
integrity of the database.

To restore a .sql file backup
without constraint checking, simply add the following statements at the
beginning of your .sql file:

SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT;

SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS;

SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION;

SET NAMES utf8;

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;

SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;

SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE=’NO_AUTO_VALUE_ON_ZERO’;

SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0;

At the end of the file, add the statements required to turn on constraint checking again:

SET SQL_MODE=@OLD_SQL_MODE;

SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;

SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT;

SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS;

SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION;

SET SQL_NOTES=@OLD_SQL_NOTES;

With these modifications, you should be able to restore your database from a .sql file backup created with any tool.

If
you have similar problems installing the sample database, just add the
same statements to the .sql file containing the sample data.

 

 

转载: http://linux.blogbus.com/logs/37279191.html