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<?php
namespace Drupal\Core\Database\Driver\mysql;
use Drupal\Core\Database\Query\Upsert as QueryUpsert;
/**
* MySQL implementation of \Drupal\Core\Database\Query\Upsert.
*/
class Upsert extends QueryUpsert {
/**
* {@inheritdoc}
*/
public function __toString() {
// Create a sanitized comment string to prepend to the query.
$comments = $this->connection->makeComment($this->comments);
// Default fields are always placed first for consistency.
$insert_fields = array_merge($this->defaultFields, $this->insertFields);
$query = $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $insert_fields) . ') VALUES ';
$values = $this->getInsertPlaceholderFragment($this->insertValues, $this->defaultFields);
$query .= implode(', ', $values);
// Updating the unique / primary key is not necessary.
unset($insert_fields[$this->key]);
$update = [];
foreach ($insert_fields as $field) {
$update[] = "$field = VALUES($field)";
}
$query .= ' ON DUPLICATE KEY UPDATE ' . implode(', ', $update);
return $query;
}
}