Question

我使用mysqldump来备份我的数据库。我的数据库被一次事故摧毁了，现在我想恢复它。但是SQL文件由bug＃28969进行了双重编码。 http://bugs.mysql.com/bug.php?id=28969 有没有解决方案让我的数据回归？我只有mysqldump生成的SQL文件。感谢。

我收回了我的数据。谢谢大家。

通过这种方式，

1.导入凌乱的数据

2.将sqldump用作'mysqldump -h“$ DB_HOST -u”$ DB_USER“-p”$ DB_PASSWORD“--opt --quote-names --skip-set-charset --default-character-set = latin1“$ DB_NAME”＆gt; /tmp/temp.sql'

参考

http://pastebin.com/iSwVPk1w

Answer 1

我收回了我的数据。谢谢大家。

通过这种方式，

1.导入凌乱的数据

2.将sqldump用作mysqldump -h "$DB_HOST -u "$DB_USER" -p"$DB_PASSWORD" --opt --quote-names --skip-set-charset --default-character-set=latin1 "$DB_NAME" > /tmp/temp.sql

参考

#!/bin/bash -e

DB_HOST="$1"
DB_USER="$2"
DB_PASSWORD="$3"
DB_NAME="$4"


mysqldump -h "$DB_HOST -u "$DB_USER" -p"$DB_PASSWORD" --opt --quote-names \
    --skip-set-charset --default-character-set=latin1 "$DB_NAME" > /tmp/temp.sql

mysql -h "$DB_HOST" -u "$DB_USER" -p"$DB_PASSWORD" \
    --default-character-set=utf8 "$DB_NAME" < /tmp/temp.sql

Answer 2

如果它只是将UTF-8字节加倍或者前置一些东西，我建议将一个快速的sed / awk命令放在一起来匹配并纠正它们。

http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained

如果您对此不满意，可以使用任何带有正则表达式支持的脚本语言来轻松执行相同的操作，但可能需要几分钟时间。

Answer 3

如果您的数据库包含正确的排序规则，但数据库中的完整数据是双重编码，那么这将帮助您记住只执行一次并备份数据库。

<?php
/**
 * DoublyEncodeCorrection.php
 *
 * NOTE: Look for 'TODO's for things you may need to configure.
 * PHP Version 5
 *
 */
ini_set('display_errors','1');
//error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
// TODO: Pretend-mode -- if set to true, no SQL queries will be executed.  Instead, they will only be echo'd
// to the console.
$pretend = true;

// TODO: Should SET and ENUM columns be processed?
$processEnums = false;

// TODO: The collation you want to convert the overall database to
$defaultCollation = 'utf8_general_ci';

// TODO Convert column collations and table defaults using this mapping
// latin1_swedish_ci is included since that's the MySQL default
$collationMap = array(
    'latin1_bin'        => 'utf8_bin',
    'latin1_general_ci' => 'utf8_general_ci',
    'latin1_swedish_ci' => 'utf8_general_ci'
);

$mapstring = '';
foreach ($collationMap as $s => $t) {
    $mapstring .= "'$s',";
}

$mapstring = substr($mapstring, 0, -1); // Strip trailing comma
//echo $mapstring;

// TODO: Database information
$dbHost = 'localhost';
$dbName = 'tina';
$dbUser = 'root';
$dbPass = 'root';

// Open a connection to the information_schema database
$infoDB = mysql_connect($dbHost, $dbUser, $dbPass);

mysql_select_db('information_schema', $infoDB);

// Open a second connection to the target (to be converted) database
$targetDB = mysql_connect($dbHost, $dbUser, $dbPass, true);
mysql_select_db($dbName, $targetDB);

if (!is_resource($targetDB)) {
    echo "Could not connect to db!: " . mysql_error();exit;
}

if (mysql_select_db($dbName, $targetDB) === FALSE) {
    echo "Could not select database!: " . mysql_error();exit;
}

//
// TODO: FULLTEXT Indexes
//
// You may need to drop FULLTEXT indexes before the conversion -- execute the drop here.
// eg.
//    sqlExec($targetDB, "ALTER TABLE MyTable DROP INDEX `my_index_name`", $pretend);
//
// If so, you should restore the FULLTEXT index after the conversion -- search for 'TODO'
// later in this script.
//

// Get all tables in the specified database
$tables = sqlObjs($infoDB,
    "SELECT TABLE_NAME, TABLE_COLLATION
     FROM   TABLES
     WHERE  TABLE_SCHEMA = '$dbName'");

foreach ($tables as $table) {
    $tableName      = $table->TABLE_NAME;
    $tableCollation = $table->TABLE_COLLATION;

    // Find all columns that aren't of the destination collation
    $cols = sqlObjs($infoDB,
        "SELECT *
         FROM   COLUMNS
         WHERE  TABLE_SCHEMA    = '$dbName'
            AND TABLE_Name      = '$tableName'
            ");

    $intermediateChanges = array();
    $finalChanges = array();

    foreach ($cols as $col) {

        // If this column doesn't use one of the collations we want to handle, skip it
        if (in_array($col->COLLATION_NAME, $collationMap)) {
            //echo "<pre>";print_r($col->COLUMN_NAME);exit;
           sqlExec($targetDB,"UPDATE $dbName.$tableName SET $col->COLUMN_NAME = CONVERT(CAST(CONVERT($col->COLUMN_NAME USING latin1) AS BINARY) USING utf8)") ;
        }
    }
}


/**
 * Executes the specified SQL
 *
 * @param object  $db      Target SQL connection
 * @param string  $sql     SQL to execute
 * @param boolean $pretend Pretend mode -- if set to true, don't execute query
 *
 * @return SQL result
 */
function sqlExec($db, $sql, $pretend = false)
{
    echo "$sql;\n";

    if ($pretend === false) {
        $res = mysql_query($sql, $db);
        //echo "<pre>";print_r($res);exit;
        $error = mysql_error($db);
        if ($error !== '') {
            print "!!! ERROR: $error\n";
        }

        return $res;
    }

    return false;
}

/**
 * Gets the SQL back as objects
 *
 * @param object $db  Target SQL connection
 * @param string $sql SQL to execute
 *
 * @return SQL objects
 */
function sqlObjs($db, $sql)
{
    $res = sqlExec($db, $sql);

    $a = array();

    if ($res !== false) {
        while ($obj = mysql_fetch_object($res)) {
            $a[] = $obj;
        }
    }

    return $a;
}

?>

如何恢复mysqldump双重编码的数据库

3 个答案: