<?php /** * Zend Framework (http://framework.zend.com/) * * @link http://github.com/zendframework/zf2 for the canonical source repository * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ namespace Zend\Db\Sql\Ddl\Constraint; class PrimaryKey extends AbstractConstraint { /** * @var string */ protected $specification = 'PRIMARY KEY (%s)'; /** * @return array */ public function getExpressionData() { $colCount = count($this->columns); $newSpecParts = array_fill(0, $colCount, '%s'); $newSpecTypes = array_fill(0, $colCount, self::TYPE_IDENTIFIER); $newSpec = sprintf($this->specification, implode(', ', $newSpecParts)); return array(array( $newSpec, $this->columns, $newSpecTypes, )); } }