インポート時にカスタムsqlエクスポートで重複キーエラーが発生する

Question

私自身のPHPスクリプトを使用してデータベースのデータベースエクスポートを作成しました。 テーブル構造をエクスポートするにはSHOW CREATE TABLEを使用してテーブルの内容をエクスポートします。テーブル内のすべてを選択し、次のようなクエリを作成します。INSERT INTO tablename VALUES (...), (..), etc. すべてをテキストファイルに保存します、すべての挿入ステートメントよりも。

私はphpMyAdminのテキストファイルをインポートしようとすると、私はエラーを取得する：

#1062 - Duplicate entry '1' for key 'name1012_parent_id' 

これは、テーブルのcreate文です：

CREATE TABLE `pages` (
    `id` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `parent_id` int(11) unsigned NOT NULL DEFAULT '0', 
    `templates_id` int(11) unsigned NOT NULL DEFAULT '0', 
    `name` varchar(128) CHARACTER SET ascii NOT NULL, 
    `status` int(10) unsigned NOT NULL DEFAULT '1', 
    `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, 
    `modified_users_id` int(10) unsigned NOT NULL DEFAULT '2', 
    `created` timestamp NOT NULL DEFAULT '2015-12-18 06:09:00', 
    `created_users_id` int(10) unsigned NOT NULL DEFAULT '2', 
    `published` datetime DEFAULT NULL, 
    `sort` int(11) NOT NULL DEFAULT '0', 
    `name1012` varchar(128) CHARACTER SET ascii DEFAULT NULL, 
    `status1012` int(10) unsigned NOT NULL DEFAULT '1', 
    `name1013` varchar(128) CHARACTER SET ascii DEFAULT NULL, 
    `status1013` int(10) unsigned NOT NULL DEFAULT '1', 
    `name1027` varchar(128) CHARACTER SET ascii DEFAULT NULL, 
    `status1027` int(10) unsigned NOT NULL DEFAULT '1', 
    PRIMARY KEY (`id`), 
    UNIQUE KEY `name_parent_id` (`name`,`parent_id`), 
    UNIQUE KEY `name1012_parent_id` (`name1012`,`parent_id`), 
    UNIQUE KEY `name1013_parent_id` (`name1013`,`parent_id`), 
    UNIQUE KEY `name1027_parent_id` (`name1027`,`parent_id`), 
    KEY `parent_id` (`parent_id`), 
    KEY `templates_id` (`templates_id`), 
    KEY `modified` (`modified`), 
    KEY `created` (`created`), 
    KEY `status` (`status`), 
    KEY `published` (`published`) 
) ENGINE=InnoDB AUTO_INCREMENT=1051 DEFAULT CHARSET=utf8; 

とINSERTクエリ：

INSERT INTO `pages` (`id`,`parent_id`,`templates_id`,`name`,`status`,`modified`,`modified_users_id`,`created`,`created_users_id`,`published`,`sort`,`name1012`,`status1012`,`name1013`,`status1013`,`name1027`,`status1027`) 
VALUES 
("1","0","1","en","9","2017-03-06 11:49:05","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","de","1","fi","1","nl","1"), 
("2","1","2","processwire","1035","2017-02-28 14:26:06","40","2017-02-28 14:25:36","2","2017-02-28 14:25:36","6","","1","","1","","1"), 
("3","2","2","page","21","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("6","3","2","add","21","2017-02-28 14:26:15","40","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("7","1","2","trash","1039","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","7","","1","","1","","1"), 
("8","3","2","list","1045","2017-02-28 14:26:18","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","","1","","1","","1"), 
("9","3","2","sort","1047","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","","1","","1","","1"), 
("10","3","2","edit","1045","2017-02-28 14:26:18","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","3","","1","","1","","1"), 
("11","22","2","template","21","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("16","22","2","field","21","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","","1","","1","","1"), 
("21","2","2","module","21","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","","1","","1","","1"), 
("22","2","2","setup","21","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","","1","","1","","1"), 
("23","2","2","login","1035","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","4","","1","","1","","1"), 
("27","1","29","http404","1035","2017-02-28 14:25:36","41","2017-02-28 14:25:36","3","2017-02-28 14:25:36","5","","1","","1","","1"), 
("28","2","2","access","13","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","3","","1","","1","","1"), 
("29","28","2","users","29","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("30","28","2","roles","29","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","","1","","1","","1"), 
("31","28","2","permissions","29","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","","1","","1","","1"), 
("32","31","5","page-edit","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","","1","","1","","1"), 
("34","31","5","page-delete","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","3","","1","","1","","1"), 
("35","31","5","page-move","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","4","","1","","1","","1"), 
("36","31","5","page-view","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("37","30","4","guest","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("38","30","4","superuser","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","","1","","1","","1"), 
("40","29","3","guest","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","","1","","1","","1"), 
("41","29","3","admin","1","2017-02-28 14:26:06","40","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","","1","","1","","1"), 
("50","31","5","page-sort","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","5","","1","","1","","1"), 
("51","31","5","page-template","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","6","","1","","1","","1"), 
("52","31","5","user-admin","25","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","10","","1","","1","","1"), 
("53","31","5","profile-edit","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","13","","1","","1","","1"), 
("54","31","5","page-lock","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","8","","1","","1","","1"), 
("300","3","2","search","1045","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","5","","1","","1","","1"), 
("301","3","2","trash","1047","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","5","","1","","1","","1"), 
("302","3","2","link","1041","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","6","","1","","1","","1"), 
("303","3","2","image","1041","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","7","","1","","1","","1"), 
("304","2","2","profile","1025","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","5","","1","","1","","1"), 
("1000","1","26","search","1025","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","2","suche","1","haku","1","","1"), 
("1001","1","29","about","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","uber","1","tietoja","1","","1"), 
("1002","1001","29","child-page-example-1","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","0","unterseite-seite-beispiel-1","1","alasivu-sivu-esimerkki-1","1","","1"), 
("1004","1001","29","child-page-example-2","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","unterseite-beispiel-2","1","alasivu-esimerkki-2","1","","1"), 
("1005","1","34","site-map","1","2017-03-06 11:49:05","41","2017-02-28 14:25:36","2","2017-02-28 14:25:36","1","sitemap","1","sivukartta","1","","1"), 
("1006","31","5","page-lister","1","2017-02-28 14:25:36","40","2017-02-28 14:25:36","40","2017-02-28 14:25:36","9","","1","","1","","1"), 
("1007","3","2","lister","1","2017-02-28 14:25:36","40","2017-02-28 14:25:36","40","2017-02-28 14:25:36","8","","1","","1","","1"), 
("1009","22","2","languages","16","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","","1","","1","","1"), 
("1010","1009","43","default","16","2017-03-09 13:55:50","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","0","","1","","1","","1"), 
("1011","22","2","language-translator","1040","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","3","","1","","1","","1"), 
("1012","1009","43","de","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","1","","1","","1","","1"), 
("1013","1009","43","fi","1","2017-02-28 14:25:36","41","2017-02-28 14:25:36","41","2017-02-28 14:25:36","2","","1","","1","","1"), 
("1015","3","2","recent-pages","1","2017-02-28 14:26:05","40","2017-02-28 14:26:05","40","2017-02-28 14:26:05","9","","0","","0","","1"), 
("1016","31","5","page-edit-recent","1","2017-02-28 14:26:05","40","2017-02-28 14:26:05","40","2017-02-28 14:26:05","10","","1","","1","","1"), 
("1017","22","2","logs","1","2017-02-28 14:26:12","40","2017-02-28 14:26:12","40","2017-02-28 14:26:12","4","","0","","0","","1"), 
("1018","31","5","logs-view","1","2017-02-28 14:26:12","40","2017-02-28 14:26:12","40","2017-02-28 14:26:12","11","","1","","1","","1"), 
("1019","31","5","logs-edit","1","2017-02-28 14:26:12","40","2017-02-28 14:26:12","40","2017-02-28 14:26:12","12","","1","","1","","1"), 
("1022","31","5","page-edit-front","1","2017-03-01 13:01:39","41","2017-03-01 13:01:39","41","2017-03-01 13:01:39","13","","1","","1","","1"), 
("1027","1009","43","nl","1","2017-03-09 12:57:23","41","2017-03-02 15:52:40","41","2017-03-02 15:52:40","3","","1","","1","","1"), 
("1028","3","2","clone","1024","2017-03-02 16:04:07","41","2017-03-02 16:04:07","41","2017-03-02 16:04:07","10","","0","","0","","0"), 
("1029","31","5","page-clone","1","2017-03-02 16:04:07","41","2017-03-02 16:04:07","41","2017-03-02 16:04:07","14","","1","","1","","1"), 
("1030","31","5","page-clone-tree","1","2017-03-02 16:04:07","41","2017-03-02 16:04:07","41","2017-03-02 16:04:07","15","","1","","1","","1"), 
("1046","22","2","jumplinks","1","2017-03-10 09:59:09","41","2017-03-10 09:59:09","41","2017-03-10 09:59:09","5","","0","","0","","0"), 
("1047","31","5","jumplinks-admin","1","2017-03-10 09:59:09","41","2017-03-10 09:59:09","41","2017-03-10 09:59:09","16","","1","","1","","1"), 
("1048","22","2","db-backups","1","2017-03-14 15:50:17","41","2017-03-14 15:50:17","41","2017-03-14 15:50:17","6","","0","","0","","0"), 
("1049","31","5","db-backup","1","2017-03-14 15:50:17","41","2017-03-14 15:50:17","41","2017-03-14 15:50:17","17","","1","","1","","1"), 
("1050","31","5","page-edit-protected","1","2017-05-18 10:42:59","41","2017-05-18 10:42:59","41","2017-05-18 10:42:59","18","","1","","1","","1"); 

間違いなく同じ値を持つinsert文があります。私が理解していないのは、なぜそこにあるのかということです。私は元のテーブルからすべての行をフェッチし、それらをテキストファイルに入れます。私が今見ているように、元のテーブルにも重複するエントリがあるはずですが、ユニークなキーのために可能ではありません。

私は、ファイルに書き込む方法は、この（簡体字）のようなものです：

$tables = $this->getTables(); // returns a list of tables 
$output = [ 
    'tables' => '', 
    'inserts' => '' 
]; 

foreach ($tables as => $table) { 
    $output['tables'][] = $this->getCreateStatement(); // uses SHOW CREATE TABLE `tableName` 
} 

foreach ($tables as => $table) { 
    foreach($this->getTableRows() as $row){ 
     $output['inserts'][] = "INSERT INTO `$table` ($this->fieldsToSql(array_keys($row))) VALUES($this->valuesToSql($row))" 
    } 
} 

$fileContent = implode(';', $output['table']) . ' ' . implode(';', $output['inserts']); 

file_put_contents('test.sql', $fileContent); 

繰り返しますが、これは上記のこの例では、私のコードの簡易版で、実際のコードではありません。私のコードは基本的に同じことをします。

valuesToSql()方法は次のように機能します。

$output = []; 
foreach($arr as $val) { 
    $output[] = '".$val."'; 
} 

return implode(',', $output); 

Answer 1

問題は、あなたのvaluesToSql()方法は、空の文字列にnull値を変換することです。 MySQLではunique indexes allow multiple null valuesはインデックス値に存在する：

For all engines, a UNIQUE index permits multiple NULL values for columns that can contain NULL. If you specify a prefix value for a column in a UNIQUE index, the column values must be unique within the prefix.

しかし、空の文字列がnullと同じではなく、重複キーエラーをトリガします。

さらに、実際の基礎となる値に関係なく、コードはすべての値を文字列に変換します。文字列が数値フィールドの有効なデータではないため、ターゲットMySQLサーバにstrict_all_tables SQLモードが有効になっていると、この問題が発生する可能性があります。

私は値がnullあるかどうかを確認し、違っそれを扱うでしょうnull問題、対処するには：

output = []; 
foreach($arr as $val) { 
    if $val===NULL { 
     $output[] = 'NULL'; 
    } 
    else { 
     $output[] = "'".$val."'"; 
    } 
} 

return implode(',', $output); 

をあなたはデータの種類に基づいて、上記ループにさらにチェックを追加し、出力を変更することができますそれに応じて。