vendor/davedevelopment/phpmig/src/Phpmig/Adapter/PDO/Sql.php

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<?php

namespace Phpmig\Adapter\PDO;

use Phpmig\Migration\Migration,
    Phpmig\Adapter\AdapterInterface,
    PDO;

/**
 * Simple PDO adapter to work with SQL database
 *
 * @author Samuel Laulhau https://github.com/lalop
 */

class Sql implements AdapterInterface
{

    /**
     * @var \PDO
     */
    protected $connection    = null;

    /**
     * @var string
     */
    protected $tableName     = null;

    /**
     * @var string
     */
    protected $pdoDriverName = null;

    /**
     * Constructor
     *
     * @param \PDO $connection
     * @param string $tableName
     */
    public function __construct(\PDO $connection, $tableName)
    {
        $this->connection    = $connection;
        $this->tableName     = $tableName;
        $this->pdoDriverName = $connection->getAttribute(\PDO::ATTR_DRIVER_NAME);
    }

    private function quotedTableName()
    {
        return "`{$this->tableName}`";
    }

    /**
     * Fetch all
     *
     * @return array
     */
    public function fetchAll()
    {
        $sql = $this->getQuery('fetchAll');

        return $this->connection->query($sql, PDO::FETCH_COLUMN, 0)->fetchAll();