Source of file Driver.php

<?php declare(strict_types=1);

/**

 * Query

 *

 * SQL Query Builder / Database Abstraction Layer

 *

 * PHP version 7.1

 *

 * @package     Query

 * @author      Timothy J. Warren <tim@timshomepage.net>

 * @copyright   2012 - 2018 Timothy J. Warren

 * @license     http://www.opensource.org/licenses/mit-license.html  MIT License

 * @link        https://git.timshomepage.net/aviat4ion/Query

 */

namespace Query\Drivers\Sqlite;

use PDO;

use Query\Drivers\AbstractDriver;

/**

 * SQLite specific class

 */

class Driver extends AbstractDriver {

	/**

	 * SQLite has a truncate optimization,

	 * but no support for the actual keyword

	 * @var boolean

	 */

	protected $hasTruncate = FALSE;

	/**

	 * Open SQLite Database

	 *

	 * @param string $dsn

	 * @param string $user

	 * @param string $pass

	 * @param array $driverOptions

	 */

	public function __construct(string $dsn, string $user=NULL, string $pass=NULL, array $driverOptions=[])

	{

		if (strpos($dsn, 'sqlite:') === FALSE)

		{

			$dsn = "sqlite:{$dsn}";

		}

		parent::__construct($dsn, $user, $pass);

	}

	/**

	 * List tables for the current database

	 *

	 * @return mixed

	 */

	public function getTables(): array

	{

		$sql = $this->sql->tableList();

		$res = $this->query($sql);

		return dbFilter($res->fetchAll(PDO::FETCH_ASSOC), 'name');

	}

	/**

	 * Retrieve foreign keys for the table

	 *

	 * @param string $table

	 * @return array

	 */

	public function getFks($table): array

	{

		$returnRows = [];

		foreach(parent::getFks($table) as $row)

		{

			$returnRows[] = [

				'child_column' => $row['from'],

				'parent_table' => $row['table'],

				'parent_column' => $row['to'],

				'update' => $row['on_update'],

				'delete' => $row['on_delete']

			];

		}

		return $returnRows;

	}

	/**

	 * Create sql for batch insert

	 *

	 * @codeCoverageIgnore

	 * @param string $table

	 * @param array $data

	 * @return array

	 */

	public function insertBatch(string $table, array $data=[]): array

	{

		// If greater than version 3.7.11, supports the same syntax as

		// MySQL and Postgres

		if (version_compare($this->getAttribute(PDO::ATTR_SERVER_VERSION), '3.7.11', '>='))

		{

			return parent::insertBatch($table, $data);

		}

		// --------------------------------------------------------------------------

		// Otherwise, do a union query as an analogue to a 'proper' batch insert

		// --------------------------------------------------------------------------

		// Each member of the data array needs to be an array

		if ( ! \is_array(current($data)))

		{

			return NULL;

		}

		// Start the block of sql statements

		$table = $this->quoteTable($table);

		$sql = "INSERT INTO {$table} \n";

		// Create a key-value mapping for each field

		$first = array_shift($data);

		$cols = [];

		foreach($first as $colname => $datum)

		{

			$cols[] = $this->_quote($datum) . ' AS ' . $this->quoteIdent($colname);

		}

		$sql .= 'SELECT ' . implode(', ', $cols) . "\n";

		foreach($data as $union)

		{

			$vals = array_map([$this, 'quote'], $union);

			$sql .= 'UNION SELECT ' . implode(',', $vals) . "\n";

		}

		return [$sql, NULL];

	}

}