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doctrine2/lib/Doctrine/Connection/Oracle.php

72 lines
2.1 KiB
PHP

<?php
/**
* oracle driver
*/
class Doctrine_Connection_Oracle extends Doctrine_Connection {
/**
* Adds an driver-specific LIMIT clause to the query
*
* @param string $query
* @param mixed $limit
* @param mixed $offset
*/
public function modifyLimitQuery($query,$limit,$offset) {
$e = explode("select ",strtolower($query));
$e2 = explode(" from ",$e[1]);
$fields = $e2[0];
$query = "SELECT $fields FROM (SELECT rownum as linenum, $fields FROM ($query) WHERE rownum <= ($offset + $limit)) WHERE linenum >= ".++$offset;
return $query;
}
/**
* returns the next value in the given sequence
* @param string $sequence
* @return integer
*/
public function getNextID($sequence) {
$stmt = $this->query("SELECT $sequence.nextval FROM dual");
$data = $stmt->fetch(PDO::FETCH_NUM);
return $data[0];
}
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time:
* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
* - CURRENT_DATE (date, DATE type)
* - CURRENT_TIME (time, TIME type)
*
* @return string to call a variable with the current timestamp
* @access public
*/
function now($type = 'timestamp')
{
switch ($type) {
case 'date':
case 'time':
case 'timestamp':
default:
return 'TO_CHAR(CURRENT_TIMESTAMP, \'YYYY-MM-DD HH24:MI:SS\')';
}
}
/**
* substring
*
* @return string SQL substring function with given parameters
*/
function substring($value, $position = 1, $length = null) {
if($length !== null)
return "SUBSTR($value, $position, $length)";
return "SUBSTR($value, $position)";
}
/**
* random
*
* @return string an oracle SQL string that generates a float between 0 and 1
*/
function random() {
return 'dbms_random.value';
}
}