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Removing PEAR database abstraction support
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@5726 3807eeeb-6ff5-0310-8944-8be069107fe0
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<?php
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/* SVN FILE: $Id$ */
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/**
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* {@link http://pear.php.net/package/DB PEAR::DB} layer for DBO.
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*
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* Long description for file
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2007, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2007, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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* @since CakePHP(tm) v 0.2.9
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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/**
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* Create an include path required PEAR libraries.
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*/
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ini_set('include_path', ini_get('include_path') . PATH_SEPARATOR . PEAR);
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vendor ('Pear/DB');
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/**
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* {@link http://pear.php.net/package/DB PEAR::DB} layer for DBO.
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*
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* Long description for class
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*
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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*/
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class DboPear extends DboSource{
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/**
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* PEAR::DB object with which we connect.
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*
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* @var DB The connection object.
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* @access private
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*/
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var $_pear = null;
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/**
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* Connects to the database using options in the given configuration array.
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*
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* @param array $config Configuration array for connecting
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* @return boolean True if the database could be connected, else false
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*/
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function connect($config) {
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$this->config =$config;
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$dsn =$config['driver'] . '://' . $config['login'] . ':' . $config['password'] . '@'
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. $config['host'] . '/' . $config['database'];
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$options=array('debug' => Configure::read() - 1,
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'portability' => DB_PORTABILITY_ALL,);
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$this->_pear =&DB::connect($dsn, $options);
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$this->connected=$this->_pear ? true : false;
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return !(PEAR::isError($this->_pear));
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}
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/**
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* Disconnects from database.
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*
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* @return boolean True if the database could be disconnected, else false
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*/
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function disconnect() {
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die (__('Please implement DBO::disconnect() first.'));
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}
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/**
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* Executes given SQL statement.
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*
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* @param string $sql SQL statement
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* @return resource Result resource identifier
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*/
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function execute($sql) {
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return $this->_pear->query($sql);
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}
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/**
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* Returns a row from given resultset as an array .
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*
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* @return array The fetched row as an array
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*/
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function fetchRow($sql = null) {
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if (!empty($sql) && is_string($sql) && strlen($sql) > 5) {
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if (!$this->execute($sql)) {
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return null;
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}
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}
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return $this->_result->fetchRow(DB_FETCHMODE_ASSOC);
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}
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/**
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* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
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* :WARNING: :TODO: POSTGRESQL & MYSQL ONLY! PEAR::DB doesn't support universal table listing.
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*
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* @return array Array of tablenames in the database
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*/
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function tablesList() {
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$driver=$this->config['driver'];
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$tables=array();
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if ('postgres' == $driver) {
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$sql ="SELECT a.relname AS name
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FROM pg_class a, pg_user b
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WHERE ( relkind = 'r') and relname !~ '^pg_' AND relname !~ '^sql_'
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AND relname !~ '^xin[vx][0-9]+' AND b.usesysid = a.relowner
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AND NOT (EXISTS (SELECT viewname FROM pg_views WHERE viewname=a.relname));";
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$result=$this->all($sql);
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foreach ($result as $item) {
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$tables[] = $item['name'];
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}
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} elseif ('mysql' == $driver) {
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$result=array();
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$result=mysql_list_tables($this->config['database']);
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while ($item = mysql_fetch_array($result)) {
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$tables[] = $item[0];
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}
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} else {
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die (__('Please implement DBO_Pear::tablesList() for your database driver.'));
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}
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if (!$result) {
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trigger_error(ERROR_NO_TABLE_LIST, E_USER_ERROR);
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exit;
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} else {
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return $tables;
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}
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}
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/**
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* Returns an array of the fields in given table name.
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*
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* @param string $tableName Name of database table to inspect
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* @return array Fields in table. Keys are name and type
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*/
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function fields($tableName) {
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$data =$this->_pear->tableInfo($tableName);
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$fields=false;
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foreach ($data as $item) {
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$fields[] = array('name' => $item['name'],
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'type' => $item['type']);
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}
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return $fields;
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}
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/**
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* Returns a quoted and escaped string of $data for use in an SQL statement.
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*
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* @param string $data String to be prepared for use in an SQL statement
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* @return string Quoted and escaped
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*/
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function prepareValue($data) {
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return $this->_pear->quoteSmart($data);
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}
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/**
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* Returns a formatted error message from previous database operation.
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*
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* @return string Error message
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*/
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function lastError() {
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return PEAR::isError($this->_result) ? $this->_result->getMessage() : null;
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}
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/**
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* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
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*
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* @return int Number of affected rows
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*/
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function lastAffected() {
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return $this->_pear->affectedRows();
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}
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/**
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* Returns number of rows in previous resultset. If no previous resultset exists,
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* this returns false.
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*
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* @return int Number of rows in resultset
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*/
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function lastNumRows() {
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if (method_exists($this->_result, 'numRows')) {
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return $this->_result->numRows();
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} else {
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return false;
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}
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}
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/**
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* Returns the ID generated from the previous INSERT operation.
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*
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* @param string $table Name of the database table
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* @return int
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*/
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function lastInsertId($table) {
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return $this->field('id', "SELECT MAX(id) FROM {$table}");
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}
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/**
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* Returns a limit statement in the correct format for the particular database.
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*
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* @param int $limit Limit of results returned
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* @param int $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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function selectLimit($limit, $offset = '0') {
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return ' ' . $this->_pear->modifyLimitQuery('', $offset, $limit);
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}
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/**
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* Inserts multiple values into a join table
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*
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* @param string $table
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* @param string $fields
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* @param array $values
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*/
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function insertMulti($table, $fields, $values) {
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$count = count($values);
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for ($x = 0; $x < $count; $x++) {
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$this->query("INSERT INTO {$table} ({$fields}) VALUES {$values[$x]}");
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}
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}
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}
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?>
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