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gnu-social/extlib/MDB2/Driver/querysim.php

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[DATABASE] Switch from PEAR DB to MDB2
2020-09-14 20:46:29 +01:00
<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | 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 |
// | REGENTS 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. |
// +----------------------------------------------------------------------+
// | Original QuerySim Concept & ColdFusion Author: Hal Helms |
// | <hal.helms@teamallaire.com> |
// | Bert Dawson <bdawson@redbanner.com> |
// +----------------------------------------------------------------------+
// | Original PHP Author: Alan Richmond <arichmond@bigfoot.com> |
// | David Huyck <b@bombusbee.com> |
// +----------------------------------------------------------------------+
// | Special note concerning code documentation: |
// | QuerySim was originally created for use during development of |
// | applications built using the Fusebox framework. (www.fusebox.org) |
// | Fusebox uses an XML style of documentation called Fusedoc. (Which |
// | is admittedly not well suited to documenting classes and functions. |
// | This short-coming is being addressed by the Fusebox community.) PEAR |
// | uses a Javadoc style of documentation called PHPDoc. (www.phpdoc.de) |
// | Since this class extension spans two groups of users, it is asked |
// | that the members of each respect the documentation standard of the |
// | other. So it is a further requirement that both documentation |
// | standards be included and maintained. If assistance is required |
// | please contact Alan Richmond. |
// +----------------------------------------------------------------------+
//
// $Id$
//
/*
<fusedoc fuse="querysim.php" language="PHP">
<responsibilities>
I take information and turn it into a recordset that can be accessed
through the PEAR MDB2 API. Based on Hal Helms' QuerySim.cfm ColdFusion
custom tag available at halhelms.com.
</responsibilities>
<properties>
<property name="API" value="PEAR MDB2" />
<property name="version" value="0.2.1" />
<property name="status" value="beta" />
<history author="Hal Helms" email="hal.helms@teamallaire.com" type="Create" />
<history author="Bert Dawson" email="bdawson@redbanner.com" type="Update">
Extensive revision that is backwardly compatible but eliminates the
need for a separate .sim file.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Create" date="10-July-2002">
Rewrote in PHP as an extention to the PEAR DB API.
Functions supported:
connect, disconnect, query, fetchRow, freeResult,
numCols, numRows, getSpecialQuery
David Huyck (bombusbee.com) added ability to escape special
characters (i.e., delimiters) using a '\'.
Extended PEAR DB options[] for adding incoming parameters. Added
options: columnDelim, dataDelim, eolDelim
</history>
<history author="David Huyck" email="b@bombusbee.com" type="Update" date="19-July-2002">
Added the ability to set the QuerySim options at runtime.
Default options are:
'columnDelim' => ',', // Commas split the column names
'dataDelim' => '|', // Pipes split the data fields
'eolDelim' => chr(13).chr(10) // Carriage returns split the
// lines of data
Affected functions are:
DB_querysim(): set the default options when the
constructor method is called
_parseQuerySim($query): altered the parsing of lines, column
names, and data fields
_empty2null: altered the way this function is called
to simplify calling it
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="24-July-2002">
Added error catching for malformed QuerySim text.
Bug fix _empty2null(): altered version was returning unmodified
lineData.
Cleanup:
PEAR compliant formatting, finished PHPDocs and added 'out' to
Fusedoc 'io'.
Broke up _parseQuerySim() into _buildResult() and _parseOnDelim()
to containerize duplicate parse code.
</history>
<history author="David Huyck" email="b@bombusbee.com" type="Update" date="25-July-2002">
Edited the _buildResult() and _parseOnDelim() functions to improve
reliability of special character escaping.
Re-introduced a custom setOption() method to throw an error when a
person tries to set one of the delimiters to '\'.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="27-July-2002">
Added '/' delimiter param to preg_quote() in _empty2null() and
_parseOnDelim() so '/' can be used as a delimiter.
Added error check for columnDelim == eolDelim or dataDelim == eolDelim.
Renamed some variables for consistancy.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="30-July-2002">
Removed protected function _empty2null(). Turns out preg_split()
deals with empty elemants by making them zero length strings, just
what they ended up being anyway. This should speed things up a little.
Affected functions:
_parseOnDelim() perform trim on line here, instead of in
_empty2null().
_buildResult() remove call to _empty2null().
_empty2null() removed function.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="1-Jan-2003">
Ported to PEAR MDB2.
Methods supported:
connect, query, getColumnNames, numCols, valid, fetch,
numRows, free, fetchRow, nextResult, setLimit
(inherited).
</history>
<history
Removed array_change_key_case() work around for <4.2.0 in
getColumnNames(), found it already done in MDB2/Common.php.
</history>
<history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="3-Feb-2003">
Changed default eolDelim to a *nix file eol, since we're trimming
the result anyway, it makes no difference for Windows. Now only
Mac file eols should need to be set (and other kinds of chars).
</history>
<note author="Alan Richmond">
Got WAY too long. See querysim_readme.txt for instructions and some
examples.
io section only documents elements of DB_result that DB_querysim uses,
adds or changes; see MDB2 and MDB2_Driver_Common for more info.
io section uses some elements that are not Fusedoc 2.0 compliant:
object and resource.
</note>
</properties>
<io>
<in>
<file path="MDB2/Common.php" action="require_once" />
</in>
<out>
<object name="MDB2_querysim" extends="MDB2_Driver_Common" instantiatedby="MDB2::connect()">
<resource type="file" name="connection" oncondition="source is external file" scope="class" />
<string name="phptype" default="querysim" />
<string name="dbsyntax" default="querysim" />
<array name="supported" comments="most of these don't actually do anything, they are enabled to simulate the option being available if checked">
<boolean name="sequences" default="true" />
<boolean name="indexes" default="true" />
<boolean name="affected_rows" default="true" />
<boolean name="summary_functions" default="true" />
<boolean name="order_by_text" default="true" />
<boolean name="current_id" default="true" />
<boolean name="limit_querys" default="true" comments="this one is functional" />
<boolean name="LOBs" default="true" />
<boolean name="replace" default="true" />
<boolean name="sub_selects" default="true" />
<boolean name="transactions" default="true" />
</array>
<string name="last_query" comments="last value passed in with query()" />
<array name="options" comments="these can be changed at run time">
<string name="columnDelim" default="," />
<string name="dataDelim" default="|" />
<string name="eolDelim" default="chr(13).chr(10)" />
</array>
</object>
<array name="result" comments="the simulated record set returned by ::query()">
<array comments="columns">
<string comments="column name" />
</array>
<array comments="data">
<array comments="row">
<string comments="data element" />
</array>
</array>
</array>
</out>
</io>
</fusedoc>
*/
/**
* MDB2 QuerySim driver
*
* @package MDB2
* @category Database
* @author Alan Richmond <arichmond@bigfoot.com>
*/
class MDB2_Driver_querysim extends MDB2_Driver_Common
{
// }}}
// {{{ constructor
/**
* Constructor
*/
function __construct()
{
parent::__construct();
$this->phptype = 'querysim';
$this->dbsyntax = 'querysim';
// Most of these are dummies to simulate availability if checked
$this->supported['sequences'] = false;
$this->supported['indexes'] = false;
$this->supported['affected_rows'] = false;
$this->supported['summary_functions'] = false;
$this->supported['order_by_text'] = false;
$this->supported['current_id'] = false;
$this->supported['limit_queries'] = true;// this one is real
$this->supported['LOBs'] = true;
$this->supported['replace'] = false;
$this->supported['sub_selects'] = false;
$this->supported['transactions'] = false;
$this->supported['savepoints'] = false;
$this->supported['auto_increment'] = false;
$this->supported['primary_key'] = false;
$this->supported['result_introspection'] = false; // not implemented
$this->supported['prepared_statements'] = false;
$this->supported['identifier_quoting'] = false;
$this->supported['pattern_escaping'] = false;
$this->supported['new_link'] = false;
$this->options['columnDelim'] = ',';
$this->options['dataDelim'] = '|';
$this->options['eolDelim'] = "\n";
}
// }}}
// {{{ connect()
/**
* Open a file or simulate a successful database connect
*
* @access public
*
* @return mixed MDB2_OK string on success, a MDB2 error object on failure
*/
function connect()
{
if (is_resource($this->connection)) {
if ($this->connected_database_name == $this->database_name
&& ($this->opened_persistent == $this->options['persistent'])
) {
return MDB2_OK;
}
if ($this->connected_database_name) {
$this->_close($this->connection);
}
$this->disconnect();
}
$connection = 1;// sim connect
// if external, check file...
if ($this->database_name) {
$file = $this->database_name;
if (!file_exists($file)) {
return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'file not found', __FUNCTION__);
}
if (!is_file($file)) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'not a file', __FUNCTION__);
}
if (!is_readable($file)) {
return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION, null, null,
'could not open file - check permissions', __FUNCTION__);
}
// ...and open if persistent
if ($this->options['persistent']) {
$connection = @fopen($file, 'r');
}
}
if (!empty($this->dsn['charset'])) {
$result = $this->setCharset($this->dsn['charset'], $connection);
if (MDB2::isError($result)) {
return $result;
}
}
$this->connection = $connection;
$this->connected_database_name = $this->database_name;
$this->opened_persistent = $this->options['persistent'];
$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
return MDB2_OK;
}
// }}}
// {{{ disconnect()
/**
* Log out and disconnect from the database.
*
* @param boolean $force if the disconnect should be forced even if the
* connection is opened persistently
* @return mixed true on success, false if not connected and error
* object on error
* @access public
*/
function disconnect($force = true)
{
if (is_resource($this->connection)) {
if ($this->opened_persistent) {
@fclose($this->connection);
}
}
return parent::disconnect($force);
}
// }}}
// {{{ _doQuery()
/**
* Execute a query
* @param string $query query
* @param boolean $is_manip if the query is a manipulation query
* @param resource $connection
* @param string $database_name
* @return result or error object
* @access protected
*/
function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
{
if ($this->database_name) {
$query = $this->_readFile();
}
$this->last_query = $query;
$result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
if ($result) {
if (MDB2::isError($result)) {
return $result;
}
$query = $result;
}
if ($is_manip) {
$err =& $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'Manipulation statements are not supported', __FUNCTION__);
return $err;
}
if ($this->options['disable_query']) {
$result = $is_manip ? 0 : null;
return $result;
}
$result = $this->_buildResult($query);
if (MDB2::isError($result)) {
return $result;
}
if ($this->next_limit > 0) {
$result[1] = array_slice($result[1], $this->next_offset, $this->next_limit);
}
$this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
return $result;
}
// }}}
// {{{ _modifyQuery()
/**
* Changes a query string for various DBMS specific reasons
*
* @param string $query query to modify
* @param boolean $is_manip if it is a DML query
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string modified query
* @access protected
*/
function _modifyQuery($query, $is_manip, $limit, $offset)
{
$this->next_limit = $limit;
$this->next_offset = $offset;
return $query;
}
// }}}
// {{{ _readFile()
/**
* Read an external file
*
* @param string filepath/filename
*
* @access protected
*
* @return string the contents of a file
*/
function _readFile()
{
$buffer = '';
if ($this->opened_persistent) {
$connection = $this->getConnection();
if (MDB2::isError($connection)) {
return $connection;
}
while (!feof($connection)) {
$buffer.= fgets($connection, 1024);
}
rewind($connection);
} else {
$connection = @fopen($this->connected_database_name, 'r');
while (!feof($connection)) {
$buffer.= fgets($connection, 1024);
}
@fclose($connection);
}
return $buffer;
}
// }}}
// {{{ _buildResult()
/**
* Convert QuerySim text into an array
*
* @param string Text of simulated query
*
* @access protected
*
* @return multi-dimensional array containing the column names and data
* from the QuerySim
*/
function _buildResult($query)
{
$eolDelim = $this->options['eolDelim'];
$columnDelim = $this->options['columnDelim'];
$dataDelim = $this->options['dataDelim'];
$columnNames = array();
$data = array();
if ($columnDelim == $eolDelim) {
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'columnDelim and eolDelim must be different', __FUNCTION__);
} elseif ($dataDelim == $eolDelim){
return $this->raiseError(MDB2_ERROR_INVALID, null, null,
'dataDelim and eolDelim must be different', __FUNCTION__);
}
$query = trim($query);
//tokenize escaped slashes
$query = str_replace('\\\\', '[$double-slash$]', $query);
if (!strlen($query)) {
return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
'empty querysim text', __FUNCTION__);
}
$lineData = $this->_parseOnDelim($query, $eolDelim);
//kill the empty last row created by final eol char if it exists
if (!strlen(trim($lineData[count($lineData) - 1]))) {
unset($lineData[count($lineData) - 1]);
}
//populate columnNames array
$thisLine = each($lineData);
$columnNames = $this->_parseOnDelim($thisLine[1], $columnDelim);
if ((in_array('', $columnNames)) || (in_array('NULL', $columnNames))) {
return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
'all column names must be defined', __FUNCTION__);
}
//replace double-slash tokens with single-slash
$columnNames = str_replace('[$double-slash$]', '\\', $columnNames);
$columnCount = count($columnNames);
$rowNum = 0;
//loop through data lines
if (count($lineData) > 1) {
while ($thisLine = each($lineData)) {
$thisData = $this->_parseOnDelim($thisLine[1], $dataDelim);
$thisDataCount = count($thisData);
if ($thisDataCount != $columnCount) {
$fileLineNo = $rowNum + 2;
return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
"number of data elements ($thisDataCount) in line $fileLineNo not equal to number of defined columns ($columnCount)", __FUNCTION__);
}
//loop through data elements in data line
foreach ($thisData as $thisElement) {
if (strtoupper($thisElement) == 'NULL'){
$thisElement = '';
}
//replace double-slash tokens with single-slash
$data[$rowNum][] = str_replace('[$double-slash$]', '\\', $thisElement);
}//end foreach
++$rowNum;
}//end while
}//end if
return array($columnNames, $data);
}
// }}}
// {{{ _parseOnDelim()
/**
* Split QuerySim string into an array on a delimiter
*
* @param string $thisLine Text of simulated query
* @param string $delim The delimiter to split on
*
* @access protected
*
* @return array containing parsed string
*/
function _parseOnDelim($thisLine, $delim)
{
$delimQuoted = preg_quote($delim, '/');
$thisLine = trim($thisLine);
$parsed = preg_split('/(?<!\\\\)' .$delimQuoted. '/', $thisLine);
//replaces escaped delimiters
$parsed = preg_replace('/\\\\' .$delimQuoted. '/', $delim, $parsed);
if ($delim != $this->options['eolDelim']) {
//replaces escape chars
$parsed = preg_replace('/\\\\/', '', $parsed);
}
return $parsed;
}
// }}}
// {{{ &exec()
/**
* Execute a manipulation query to the database and return any the affected rows
*
* @param string $query the SQL query
* @return mixed affected rows on success, a MDB2 error on failure
* @access public
*/
function &exec($query)
{
return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'Querysim only supports reading data', __FUNCTION__);
}
// }}}
// {{{ getServerVersion()
/**
* return version information about the server
*
* @param bool $native determines if the raw version string should be returned
* @return mixed array/string with version information or MDB2 error object
* @access public
*/
function getServerVersion($native = false)
{
$server_info = '@package_version@';
// cache server_info
$this->connected_server_info = $server_info;
if (!$native) {
$tmp = explode('.', $server_info, 3);
if (!isset($tmp[2]) || !preg_match('/(\d+)(.*)/', $tmp[2], $tmp2)) {
$tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;
$tmp2[1] = null;
}
$server_info = array(
'major' => isset($tmp[0]) ? $tmp[0] : null,
'minor' => isset($tmp[1]) ? $tmp[1] : null,
'patch' => isset($tmp2[0]) ? $tmp2[0] : null,
'extra' => isset($tmp2[1]) ? $tmp2[1] : null,
'native' => $server_info,
);
}
return $server_info;
}
}
/**
* MDB2 QuerySim result driver
*
* @package MDB2
* @category Database
* @author Alan Richmond <arichmond@bigfoot.com>
*/
class MDB2_Result_querysim extends MDB2_Result_Common
{
// }}}
// {{{ fetchRow()
/**
* Fetch a row and insert the data into an existing array.
*
* @param int $fetchmode how the array data should be indexed
* @param int $rownum number of the row where the data can be found
* @return int data array on success, a MDB2 error on failure
* @access public
*/
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
{
if (false === $this->result) {
$err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
return $err;
}
if (null === $this->result) {
return null;
}
if (null !== $rownum) {
$seek = $this->seek($rownum);
if (MDB2::isError($seek)) {
return $seek;
}
}
$target_rownum = $this->rownum + 1;
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
$fetchmode = $this->db->fetchmode;
}
if (!isset($this->result[1][$target_rownum])) {
$null = null;
return $null;
}
$row = $this->result[1][$target_rownum];
// make row associative
if ( $fetchmode == MDB2_FETCHMODE_ASSOC
|| $fetchmode == MDB2_FETCHMODE_OBJECT
) {
$column_names = $this->getColumnNames();
foreach ($column_names as $name => $i) {
$column_names[$name] = $row[$i];
}
$row = $column_names;
}
$mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
$rtrim = false;
if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
if (empty($this->types)) {
$mode += MDB2_PORTABILITY_RTRIM;
} else {
$rtrim = true;
}
}
if ($mode) {
$this->db->_fixResultArrayValues($row, $mode);
}
if ( ( $fetchmode != MDB2_FETCHMODE_ASSOC
&& $fetchmode != MDB2_FETCHMODE_OBJECT)
&& !empty($this->types)
) {
$row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
} elseif (($fetchmode == MDB2_FETCHMODE_ASSOC
|| $detchmode == MDB2_FETCHMODE_OBJECT)
&& !empty($this->types_assoc)
) {
$row = $this->db->datatype->convertResultRow($this->types_assoc, $row, $rtrim);
}
if (!empty($this->values)) {
$this->_assignBindColumns($row);
}
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
$object_class = $this->db->options['fetch_class'];
if ($object_class == 'stdClass') {
$row = (object) $row;
} else {
$row = new $object_class($row);
}
}
++$this->rownum;
return $row;
}
// }}}
// {{{ _getColumnNames()
/**
* Retrieve the names of columns returned by the DBMS in a query result.
*
* @return mixed Array variable that holds the names of columns as keys
* or an MDB2 error on failure.
* Some DBMS may not return any columns when the result set
* does not contain any rows.
* @access private
*/
function _getColumnNames()
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return array();
}
$columns = array_flip($this->result[0]);
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$columns = array_change_key_case($columns, $this->db->options['field_case']);
}
return $columns;
}
// }}}
// {{{ numCols()
/**
* Count the number of columns returned by the DBMS in a query result.
*
* @access public
* @return mixed integer value with the number of columns, a MDB2 error
* on failure
*/
function numCols()
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return count($this->types);
}
$cols = count($this->result[0]);
return $cols;
}
}
/**
* MDB2 QuerySim buffered result driver
*
* @package MDB2
* @category Database
* @author Alan Richmond <arichmond@bigfoot.com>
*/
class MDB2_BufferedResult_querysim extends MDB2_Result_querysim
{
// }}}
// {{{ seek()
/**
* Seek to a specific row in a result set
*
* @param int $rownum number of the row where the data can be found
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function seek($rownum = 0)
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
$this->rownum = $rownum - 1;
return MDB2_OK;
}
// }}}
// {{{ valid()
/**
* Check if the end of the result set has been reached
*
* @return mixed true or false on sucess, a MDB2 error on failure
* @access public
*/
function valid()
{
$numrows = $this->numRows();
if (MDB2::isError($numrows)) {
return $numrows;
}
return $this->rownum < ($numrows - 1);
}
// }}}
// {{{ numRows()
/**
* Returns the number of rows in a result object
*
* @return mixed MDB2 Error Object or the number of rows
* @access public
*/
function numRows()
{
if (false === $this->result) {
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'resultset has already been freed', __FUNCTION__);
}
if (null === $this->result) {
return 0;
}
$rows = count($this->result[1]);
return $rows;
}
}
/**
* MDB2 QuerySim statement driver
*
* @package MDB2
* @category Database
* @author Alan Richmond <arichmond@bigfoot.com>
*/
class MDB2_Statement_querysim extends MDB2_Statement_Common
{
}
?>
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