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159
lib/symfony/vendor/creole/drivers/mssql/MSSQLResultSet.php
vendored
Executable file
159
lib/symfony/vendor/creole/drivers/mssql/MSSQLResultSet.php
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<?php
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/*
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* $Id: MSSQLResultSet.php,v 1.21 2006/01/17 19:44:38 hlellelid Exp $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://creole.phpdb.org>.
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*/
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require_once 'creole/ResultSet.php';
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require_once 'creole/common/ResultSetCommon.php';
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/**
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* MSSQL implementation of ResultSet.
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*
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* MS SQL does not support LIMIT or OFFSET natively so the methods
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* in here need to perform some adjustments and extra checking to make sure
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* that this behaves the same as RDBMS drivers using native OFFSET/LIMIT.
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*
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* @author Hans Lellelid <hans@xmpl.org>
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* @version $Revision: 1.21 $
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* @package creole.drivers.mssql
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*/
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class MSSQLResultSet extends ResultSetCommon implements ResultSet {
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/**
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* Offset at which to start reading rows.
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* @var int
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*/
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private $offset = 0;
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/**
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* Maximum rows to retrieve, or 0 if all.
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* @var int
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*/
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private $limit = 0;
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/**
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* This MSSQL-only function exists to set offset after ResultSet is instantiated.
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* This function should be "protected" in Java sense: only available to classes in package.
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* THIS METHOD SHOULD NOT BE CALLED BY ANYTHING EXCEPTION DRIVER CLASSES.
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* @param int $offset New offset. If great than 0, then seek(0) will be called to move cursor.
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* @access protected
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*/
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public function _setOffset($offset)
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{
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$this->offset = $offset;
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if ($offset > 0) {
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$this->seek(0); // 0 becomes $offset by seek() method
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}
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}
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/**
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* This MSSQL-only function exists to set limit after ResultSet is instantiated.
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* This function should be "protected" in Java sense: only available to classes in package.
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* THIS METHOD SHOULD NOT BE CALLED BY ANYTHING EXCEPTION DRIVER CLASSES.
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* @param int $limit New limit.
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* @access protected
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*/
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public function _setLimit($limit)
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{
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$this->limit = $limit;
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}
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/**
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* @see ResultSet::seek()
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*/
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function seek($rownum)
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{
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// support emulated OFFSET
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$actual = $rownum + $this->offset;
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if (($this->limit > 0 && $rownum >= $this->limit) || $rownum < 0) {
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// have to check for rownum < 0, because mssql_seek() won't
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// complain if the $actual is valid.
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return false;
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}
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// MSSQL rows start w/ 0, but this works, because we are
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// looking to move the position _before_ the next desired position
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if (!@mssql_data_seek($this->result, $actual)) {
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return false;
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}
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$this->cursorPos = $rownum;
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return true;
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}
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/**
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* @see ResultSet::next()
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*/
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function next()
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{
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// support emulated LIMIT
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if ( $this->limit > 0 && ($this->cursorPos >= $this->limit) ) {
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$this->afterLast();
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return false;
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}
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$this->fields = mssql_fetch_array($this->result, $this->fetchmode);
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if (!$this->fields) {
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if ($errmsg = mssql_get_last_message()) {
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throw new SQLException("Error fetching result", $errmsg);
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} else {
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// We've advanced beyond end of recordset.
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$this->afterLast();
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return false;
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}
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}
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if ($this->fetchmode === ResultSet::FETCHMODE_ASSOC && $this->lowerAssocCase) {
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$this->fields = array_change_key_case($this->fields, CASE_LOWER);
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}
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// Advance cursor position
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$this->cursorPos++;
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return true;
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}
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/**
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* @see ResultSet::getRecordCount()
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*/
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function getRecordCount()
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{
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$rows = @mssql_num_rows($this->result);
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if ($rows === null) {
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throw new SQLException('Error getting record count', mssql_get_last_message());
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}
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// adjust count based on emulated LIMIT/OFFSET
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$rows -= $this->offset;
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return ($this->limit > 0 && $rows > $this->limit ? $this->limit : $rows);
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}
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/**
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* @see ResultSet::close()
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*/
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function close()
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{
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$ret = @mssql_free_result($this->result);
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$this->result = false;
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$this->fields = array();
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$this->limit = 0;
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$this->offset = 0;
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}
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}
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