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<?php
/*
* $Id: Oracle.php 6769 2009-11-18 21:38:51Z jwage $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.org>.
*/
/**
* Doctrine_Connection_Oracle
*
* @package Doctrine
* @subpackage Connection
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.org
* @since 1.0
* @version $Revision: 6769 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Connection_Oracle extends Doctrine_Connection_Common
{
/**
* @var string $driverName the name of this connection driver
*/
protected $driverName = 'Oracle';
public function __construct(Doctrine_Manager $manager, $adapter)
{
$this->supported = array(
'sequences' => true,
'indexes' => true,
'summary_functions' => true,
'order_by_text' => true,
'current_id' => true,
'affected_rows' => true,
'transactions' => true,
'savepoints' => true,
'limit_queries' => true,
'LOBs' => true,
'replace' => 'emulated',
'sub_selects' => true,
'auto_increment' => false, // implementation is broken
'primary_key' => true,
'result_introspection' => true,
'prepared_statements' => true,
'identifier_quoting' => true,
'pattern_escaping' => true,
);
$this->properties['sql_file_delimiter'] = "\n/\n";
$this->properties['number_max_precision'] = 38;
$this->properties['max_identifier_length'] = 30;
parent::__construct($manager, $adapter);
// moving properties to params to make them changeable by user
// VARCHAR2 allowed length is 4000 BYTE. For UTF8 strings is better to use 1000 CHAR
$this->setParam('varchar2_max_length', 4000);
// Oracle's default unit for char data types is BYTE. For UTF8 string it is better to use CHAR
$this->setParam('char_unit', null);
}
/**
* Sets up the date/time format
*
*/
public function setDateFormat($format = 'YYYY-MM-DD HH24:MI:SS')
{
$this->exec('ALTER SESSION SET NLS_DATE_FORMAT = "' . $format . '"');
}
/**
* Adds an driver-specific LIMIT clause to the query
*
* @param string $query query to modify
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string the modified query
*/
public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false)
{
return $this->_createLimitSubquery($query, $limit, $offset);
}
private function _createLimitSubquery($query, $limit, $offset, $column = null)
{
$limit = (int) $limit;
$offset = (int) $offset;
if (preg_match('/^\s*SELECT/i', $query)) {
if ( ! preg_match('/\sFROM\s/i', $query)) {
$query .= " FROM dual";
}
if ($limit > 0) {
$max = $offset + $limit;
$column = $column === null ? '*' : $this->quoteIdentifier($column);
if ($offset > 0) {
$min = $offset + 1;
$query = 'SELECT b.'.$column.' FROM ( '.
'SELECT a.*, ROWNUM AS doctrine_rownum FROM ( '
. $query . ' ) ' . $this->quoteIdentifier('a') . ' '.
' ) ' . $this->quoteIdentifier('b') . ' '.
'WHERE doctrine_rownum BETWEEN ' . $min . ' AND ' . $max;
} else {
$query = 'SELECT a.'.$column.' FROM ( ' . $query .' ) a WHERE ROWNUM <= ' . $max;
}
}
}
return $query;
}
/**
* Creates the SQL for Oracle that can be used in the subquery for the limit-subquery
* algorithm.
*/
public function modifyLimitSubquery(Doctrine_Table $rootTable, $query, $limit = false,
$offset = false, $isManip = false)
{
// NOTE: no composite key support
$columnNames = $rootTable->getIdentifierColumnNames();
if (count($columnNames) > 1) {
throw new Doctrine_Connection_Exception("Composite keys in LIMIT queries are "
. "currently not supported.");
}
$column = $columnNames[0];
return $this->_createLimitSubquery($query, $limit, $offset, $column);
}
public function getTmpConnection($info)
{
return clone $this;
}
}
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