1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Database\Drivers;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * Supplemental Oracle database driver.
 15:  *
 16:  * @author     David Grudl
 17:  */
 18: class OciDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
 19: {
 20:     /** @var Nette\Database\Connection */
 21:     private $connection;
 22: 
 23:     /** @var string  Datetime format */
 24:     private $fmtDateTime;
 25: 
 26: 
 27:     public function __construct(Nette\Database\Connection $connection, array $options)
 28:     {
 29:         $this->connection = $connection;
 30:         $this->fmtDateTime = isset($options['formatDateTime']) ? $options['formatDateTime'] : 'U';
 31:     }
 32: 
 33: 
 34:     /********************* SQL ****************d*g**/
 35: 
 36: 
 37:     /**
 38:      * Delimites identifier for use in a SQL statement.
 39:      */
 40:     public function delimite($name)
 41:     {
 42:         // @see http://download.oracle.com/docs/cd/B10500_01/server.920/a96540/sql_elements9a.htm
 43:         return '"' . str_replace('"', '""', $name) . '"';
 44:     }
 45: 
 46: 
 47:     /**
 48:      * Formats boolean for use in a SQL statement.
 49:      */
 50:     public function formatBool($value)
 51:     {
 52:         return $value ? '1' : '0';
 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:      * Encodes string for use in a LIKE statement.
 67:      */
 68:     public function formatLike($value, $pos)
 69:     {
 70:         throw new Nette\NotImplementedException;
 71:     }
 72: 
 73: 
 74:     /**
 75:      * Injects LIMIT/OFFSET to the SQL query.
 76:      */
 77:     public function applyLimit(& $sql, $limit, $offset)
 78:     {
 79:         if ($offset > 0) {
 80:             // see http://www.oracle.com/technology/oramag/oracle/06-sep/o56asktom.html
 81:             $sql = 'SELECT * FROM (SELECT t.*, ROWNUM AS "__rnum" FROM (' . $sql . ') t '
 82:                 . ($limit >= 0 ? 'WHERE ROWNUM <= ' . ((int) $offset + (int) $limit) : '')
 83:                 . ') WHERE "__rnum" > '. (int) $offset;
 84: 
 85:         } elseif ($limit >= 0) {
 86:             $sql = 'SELECT * FROM (' . $sql . ') WHERE ROWNUM <= ' . (int) $limit;
 87:         }
 88:     }
 89: 
 90: 
 91:     /**
 92:      * Normalizes result row.
 93:      */
 94:     public function normalizeRow($row, $statement)
 95:     {
 96:         return $row;
 97:     }
 98: 
 99: 
100:     /********************* reflection ****************d*g**/
101: 
102: 
103:     /**
104:      * Returns list of tables.
105:      */
106:     public function getTables()
107:     {
108:         $tables = array();
109:         foreach ($this->connection->query('SELECT * FROM cat') as $row) {
110:             if ($row[1] === 'TABLE' || $row[1] === 'VIEW') {
111:                 $tables[] = array(
112:                     'name' => $row[0],
113:                     'view' => $row[1] === 'VIEW',
114:                 );
115:             }
116:         }
117:         return $tables;
118:     }
119: 
120: 
121:     /**
122:      * Returns metadata for all columns in a table.
123:      */
124:     public function getColumns($table)
125:     {
126:         throw new Nette\NotImplementedException;
127:     }
128: 
129: 
130:     /**
131:      * Returns metadata for all indexes in a table.
132:      */
133:     public function getIndexes($table)
134:     {
135:         throw new Nette\NotImplementedException;
136:     }
137: 
138: 
139:     /**
140:      * Returns metadata for all foreign keys in a table.
141:      */
142:     public function getForeignKeys($table)
143:     {
144:         throw new Nette\NotImplementedException;
145:     }
146: 
147: 
148:     /**
149:      * @return bool
150:      */
151:     public function isSupported($item)
152:     {
153:         return $item === self::SUPPORT_COLUMNS_META || $item === self::SUPPORT_SEQUENCE;
154:     }
155: 
156: }
157: