You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
142 lines
3.8 KiB
142 lines
3.8 KiB
<?php
|
|
// This file is part of Moodle - http://moodle.org/
|
|
//
|
|
// Moodle is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// Moodle is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* sqlsrv specific recordset.
|
|
*
|
|
* @package core_dml
|
|
* @copyright 2009 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
|
|
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v2 or later
|
|
*/
|
|
|
|
defined('MOODLE_INTERNAL') || die();
|
|
|
|
require_once(__DIR__.'/moodle_recordset.php');
|
|
|
|
class sqlsrv_native_moodle_recordset extends moodle_recordset {
|
|
|
|
protected $rsrc;
|
|
protected $current;
|
|
|
|
/** @var array recordset buffer */
|
|
protected $buffer = null;
|
|
|
|
/** @var sqlsrv_native_moodle_database */
|
|
protected $db;
|
|
|
|
public function __construct($rsrc, sqlsrv_native_moodle_database $db) {
|
|
$this->rsrc = $rsrc;
|
|
$this->current = $this->fetch_next();
|
|
$this->db = $db;
|
|
}
|
|
|
|
/**
|
|
* Inform existing open recordsets that transaction
|
|
* is starting, this works around MARS problem described
|
|
* in MDL-37734.
|
|
*/
|
|
public function transaction_starts() {
|
|
if ($this->buffer !== null) {
|
|
$this->unregister();
|
|
return;
|
|
}
|
|
if (!$this->rsrc) {
|
|
$this->unregister();
|
|
return;
|
|
}
|
|
// This might eat memory pretty quickly...
|
|
raise_memory_limit('2G');
|
|
$this->buffer = array();
|
|
|
|
while($next = $this->fetch_next()) {
|
|
$this->buffer[] = $next;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unregister recordset from the global list of open recordsets.
|
|
*/
|
|
private function unregister() {
|
|
if ($this->db) {
|
|
$this->db->recordset_closed($this);
|
|
$this->db = null;
|
|
}
|
|
}
|
|
|
|
public function __destruct() {
|
|
$this->close();
|
|
}
|
|
|
|
private function fetch_next() {
|
|
if (!$this->rsrc) {
|
|
return false;
|
|
}
|
|
if (!$row = sqlsrv_fetch_array($this->rsrc, SQLSRV_FETCH_ASSOC)) {
|
|
sqlsrv_free_stmt($this->rsrc);
|
|
$this->rsrc = null;
|
|
$this->unregister();
|
|
return false;
|
|
}
|
|
|
|
unset($row['sqlsrvrownumber']);
|
|
$row = array_change_key_case($row, CASE_LOWER);
|
|
// Moodle expects everything from DB as strings.
|
|
foreach ($row as $k=>$v) {
|
|
if (is_null($v)) {
|
|
continue;
|
|
}
|
|
if (!is_string($v)) {
|
|
$row[$k] = (string)$v;
|
|
}
|
|
}
|
|
return $row;
|
|
}
|
|
|
|
public function current() {
|
|
return (object)$this->current;
|
|
}
|
|
|
|
public function key() {
|
|
// return first column value as key
|
|
if (!$this->current) {
|
|
return false;
|
|
}
|
|
$key = reset($this->current);
|
|
return $key;
|
|
}
|
|
|
|
public function next() {
|
|
if ($this->buffer === null) {
|
|
$this->current = $this->fetch_next();
|
|
} else {
|
|
$this->current = array_shift($this->buffer);
|
|
}
|
|
}
|
|
|
|
public function valid() {
|
|
return !empty($this->current);
|
|
}
|
|
|
|
public function close() {
|
|
if ($this->rsrc) {
|
|
sqlsrv_free_stmt($this->rsrc);
|
|
$this->rsrc = null;
|
|
}
|
|
$this->current = null;
|
|
$this->buffer = null;
|
|
$this->unregister();
|
|
}
|
|
}
|
|
|