Database\Drivers\PdoOciDriver.php

  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004, 2011 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  */
 11: 
 12: namespace Nette\Database\Drivers;
 13: 
 14: use Nette;
 15: 
 16: 
 17: 
 18: /**
 19:  * Supplemental Oracle database driver.
 20:  *
 21:  * @author     David Grudl
 22:  */
 23: class PdoOciDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
 24: {
 25:     /** @var Nette\Database\Connection */
 26:     private $connection;
 27: 
 28:     /** @var string  Datetime format */
 29:     private $fmtDateTime;
 30: 
 31: 
 32: 
 33:     public function __construct(Nette\Database\Connection $connection, array $options)
 34:     {
 35:         $this->connection = $connection;
 36:         $this->fmtDateTime = isset($options['formatDateTime']) ? $options['formatDateTime'] : 'U';
 37:     }
 38: 
 39: 
 40: 
 41:     /********************* SQL ****************d*g**/
 42: 
 43: 
 44: 
 45:     /**
 46:      * Delimites identifier for use in a SQL statement.
 47:      */
 48:     public function delimite($name)
 49:     {
 50:         // @see http://download.oracle.com/docs/cd/B10500_01/server.920/a96540/sql_elements9a.htm
 51:         return '"' . str_replace('"', '""', $name) . '"';
 52:     }
 53: 
 54: 
 55: 
 56:     /**
 57:      * Formats date-time for use in a SQL statement.
 58:      */
 59:     public function formatDateTime(\DateTime $value)
 60:     {
 61:         return $value->format($this->fmtDateTime);
 62:     }
 63: 
 64: 
 65: 
 66:     /**
 67:      * Encodes string for use in a LIKE statement.
 68:      */
 69:     public function formatLike($value, $pos)
 70:     {
 71:         throw new NotImplementedException;
 72:     }
 73: 
 74: 
 75: 
 76:     /**
 77:      * Injects LIMIT/OFFSET to the SQL query.
 78:      */
 79:     public function applyLimit(&$sql, $limit, $offset)
 80:     {
 81:         if ($offset > 0) {
 82:             // see http://www.oracle.com/technology/oramag/oracle/06-sep/o56asktom.html
 83:             $sql = 'SELECT * FROM (SELECT t.*, ROWNUM AS "__rnum" FROM (' . $sql . ') t ' . ($limit >= 0 ? 'WHERE ROWNUM <= ' . ((int) $offset + (int) $limit) : '') . ') WHERE "__rnum" > '. (int) $offset;
 84: 
 85:         } elseif ($limit >= 0) {
 86:             $sql = 'SELECT * FROM (' . $sql . ') WHERE ROWNUM <= ' . (int) $limit;
 87:         }
 88:     }
 89: 
 90: 
 91: 
 92:     /**
 93:      * Normalizes result row.
 94:      */
 95:     public function normalizeRow($row, $statement)
 96:     {
 97:         return $row;
 98:     }
 99: 
100: }
101:
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