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dbo_odbc.php

<?php
/* SVN FILE: $Id: dbo_odbc.php 4717 2007-03-31 17:26:16Z phpnut $ */

/**
 * ODBC for DBO
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2007, Cake Software Foundation, Inc.
 *                                              1785 E. Sahara Avenue, Suite 490-204
 *                                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright           Copyright 2005-2007, Cake Software Foundation, Inc.
 * @link                      http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package             cake
 * @subpackage          cake.cake.libs.model.dbo
 * @since               CakePHP(tm) v 0.10.5.1790
 * @version             $Revision: 4717 $
 * @modifiedby          $LastChangedBy: phpnut $
 * @lastmodified  $Date: 2007-03-31 11:26:16 -0600 (Sat, 31 Mar 2007) $
 * @license             http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Short description for class.
 *
 * Long description for class
 *
 * @package       cake
 * @subpackage    cake.cake.libs.model.dbo
 */
class DboOdbc extends DboSource{

/**
 * Driver description
 *
 * @var string
 */
      var $description = "ODBC DBO Driver";

/**
 * Table/column starting quote
 *
 * @var string
 */
      var $startQuote = "`";

/**
 * Table/column end quote
 *
 * @var string
 */
      var $endQuote = "`";

/**
 * Driver base configuration
 *
 * @var array
 */
      var $_baseConfig = array('persistent' => true,
                        'login' => 'root',
                        'password' => '',
                        'database' => 'cake',
                        'connect'  => 'odbc_pconnect'
      );

/**
 * Enter description here...
 *
 * @var unknown_type
 */

      var $columns = array();

      //    var $columns = array('primary_key' => array('name' => 'int(11) DEFAULT NULL auto_increment'),
      //                                  'string' => array('name' => 'varchar', 'limit' => '255'),
      //                                  'text' => array('name' => 'text'),
      //                                  'integer' => array('name' => 'int', 'limit' => '11'),
      //                                  'float' => array('name' => 'float'),
      //                                  'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d h:i:s', 'formatter' => 'date'),
      //                                  'timestamp' => array('name' => 'datetime', 'format' => 'Y-m-d h:i:s', 'formatter' => 'date'),
      //                                  'time' => array('name' => 'time', 'format' => 'h:i:s', 'formatter' => 'date'),
      //                                  'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
      //                                  'binary' => array('name' => 'blob'),
      //                                  'boolean' => array('name' => 'tinyint', 'limit' => '1'));

/**
 * Connects to the database using options in the given configuration array.
 *
 * @return boolean True if the database could be connected, else false
 */
      function connect() {
            $config = $this->config;
            $connect = $config['connect'];

            $this->connected = false;
            $this->connection = $connect($config['database'], $config['login'], $config['password']);

            if ($this->connection) {
                        $this->connected = true;
            }

            return $this->connected;
      }

/**
 * Disconnects from database.
 *
 * @return boolean True if the database could be disconnected, else false
 */
      function disconnect() {
            return @odbc_close($this->connection);
      }
/**
 * Executes given SQL statement.
 *
 * @param string $sql SQL statement
 * @return resource Result resource identifier
 * @access protected
 */
      function _execute($sql) {
            return odbc_exec($this->connection, $sql);
      }
/**
 * Returns an array of sources (tables) in the database.
 *
 * @return array Array of tablenames in the database
 */
      function listSources() {

            $cache = parent::listSources();
            if ($cache != null) {
                  return $cache;
            }

            /*$result = odbc_tables($this->connection);
            if (function_exists('odbc_fetch_row')) {
                  echo 'GOOD';
            } else {
                  echo 'BAD';
            }*/

            $result = odbc_tables($this->connection);

            $tables = array();
            while (odbc_fetch_row($result)) {
                  array_push($tables, odbc_result($result, "TABLE_NAME"));
            }

            foreach( $tables as $t ) {
                  echo "$t\n";
            }

            parent::listSources($tables);
            return $tables;
      }
/**
 * Returns an array of the fields in given table name.
 *
 * @param Model $model Model object to describe
 * @return array Fields in table. Keys are name and type
 */
      function &describe(&$model) {
            $cache=parent::describe($model);

            if ($cache != null) {
                        return $cache;
            }

            $fields=array();
            $sql='SELECT * FROM ' . $this->fullTableName($model) . ' LIMIT 1';
            $result=odbc_exec($this->connection, $sql);

            $count=odbc_num_fields($result);

            for($i = 1; $i <= $count; $i++) {
                        $cols[$i - 1] = odbc_field_name($result, $i);
            }

            foreach($cols as $column) {
                        $type
                        = odbc_field_type(
                              odbc_exec($this->connection, "SELECT " . $column . " FROM " . $this->fullTableName($model)),
                              1);
                        array_push($fields, array('name' => $column,
                                                                        'type' => $type));
            }

            $this->__cacheDescription($model->tablePrefix . $model->table, $fields);
            return $fields;
      }

      function name($data) {
            if ($data == '*') {
                        return '*';
            }

            $pos=strpos($data, '`');

            if ($pos === false) {
                        $data = '' . str_replace('.', '.', $data) . '';
            //$data = '`'. str_replace('.', '`.`', $data) .'`';
            }

            return $data;
      }

/**
 * Returns a quoted and escaped string of $data for use in an SQL statement.
 *
 * @param string $data String to be prepared for use in an SQL statement
 * @param string $column The column into which this data will be inserted
 * @return string Quoted and escaped
 * @todo Add logic that formats/escapes data based on column type
 */
      function value($data, $column = null) {
            $parent=parent::value($data, $column);

            if ($parent != null) {
                        return $parent;
            }

            if ($data === null) {
                        return 'NULL';
            }

            // $data = mysql_real_escape_string($data, $this->connection);

            if (!is_numeric($data)) {
                        $return = "'" . $data . "'";
            } else {
                        $return = $data;
            }

            return $return;
      }

/**
 * Not sure about this one, MySQL needs it but does ODBC?  Safer just to leave it
 * Translates between PHP boolean values and MySQL (faked) boolean values
 *
 * @param mixed $data Value to be translated
 * @return mixed Converted boolean value
 */
      function boolean($data) {
            if ($data === true || $data === false) {
                        if ($data === true) {
                              return 1;
                        }

                        return 0;
            } else {
                        if (intval($data !== 0)) {
                              return true;
                        }

                        return false;
            }
      }

/**
 * Begin a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions).
 */
      function begin(&$model) {
            if (parent::begin($model)) {
                        if (odbc_autocommit($this->connection, false)) {
                              $this->_transactionStarted = true;
                              return true;
                        }
            }

            return false;
      }

/**
 * Commit a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions,
 * or a transaction has not started).
 */
      function commit(&$model) {
            if (parent::commit($model)) {
                        if (odbc_commit($this->connection)) {
                              $this->_transactionStarted = false;
                              return true;
                        }
            }

            return false;
      }

/**
 * Rollback a transaction
 *
 * @param unknown_type $model
 * @return boolean True on success, false on fail
 * (i.e. if the database/model does not support transactions,
 * or a transaction has not started).
 */
      function rollback(&$model) {
            if (parent::rollback($model)) {
                        $this->_transactionStarted=false;
                        return odbc_rollback($this->connection);
            }

            return false;
      }

/**
 * Returns a formatted error message from previous database operation.
 *
 * @return string Error message with error number
 */
      function lastError() {
            if (odbc_error($this->connection)) {
                        return odbc_error($this->connection) . ': ' . odbc_errormsg($this->connection);
            }

            return null;
      }

/**
 * Returns number of affected rows in previous database operation. If no previous operation exists,
 * this returns false.
 *
 * @return int Number of affected rows
 */
      function lastAffected() {
            if ($this->_result) {
                        return null;
            }

            return null;
      }

/**
 * Returns number of rows in previous resultset. If no previous resultset exists,
 * this returns false.
 *
 * @return int Number of rows in resultset
 */
      function lastNumRows() {
            if ($this->_result) {
                        return@odbc_num_rows($this->_result);
            }

            return null;
      }

/**
 * Returns the ID generated from the previous INSERT operation.
 *
 * @param unknown_type $source
 * @return int
 */
      function lastInsertId($source = null) {
            $result=$this->fetchAll('SELECT @@IDENTITY');
            return $result[0];
      }

/**
 * Enter description here...
 *
 * @param string $real Real database-layer column type (i.e. "varchar(255)")
 */
      function column($real) {
            if (is_array($real)) {
                        $col=$real['name'];

                        if (isset($real['limit'])) {
                              $col .= '(' . $real['limit'] . ')';
                        }

                        return $col;
            }

            return $real;
      }

/**
 * Enter description here...
 *
 * @param unknown_type $results
 */
      function resultSet(&$results) {
            $this->results=&$results;
            $this->map=array();
            $num_fields   =odbc_num_fields($results);
            $index        =0;
            $j            =0;

            while($j < $num_fields) {
                        $column = odbc_fetch_array($results, $j);

                        if (!empty($column->table)) {
                              $this->map[$index++] = array($column->table,
                                                $column->name);
                        } else {
                              echo array(0,
                                                $column->name);

                              $this->map[$index++]=array(0,
                                                $column->name);
                        }

                        $j++;
            }
      }

/**
 * Fetches the next row from the current result set
 *
 * @return unknown
 */
      function fetchResult() {
            if ($row = odbc_fetch_row($this->results)) {
                        $resultRow=array();
                        $i=0;

                        foreach($row as $index => $field) {
                              list($table, $column)      = $this->map[$index];
                              $resultRow[$table][$column]=$row[$index];
                              $i++;
                        }

                        return $resultRow;
            } else {
                        return false;
            }
      }

      function buildSchemaQuery($schema) {
            $search=array('{AUTOINCREMENT}',
                              '{PRIMARY}',
                              '{UNSIGNED}',
                              '{FULLTEXT}',
                              '{FULLTEXT_MYSQL}',
                              '{BOOLEAN}',
                              '{UTF_8}');

            $replace=array('int(11) not null auto_increment',
                              'primary key',
                              'unsigned',
                              'FULLTEXT',
                              'FULLTEXT',
                              'enum (\'true\', \'false\') NOT NULL default \'true\'',
                              '/*!40100 CHARACTER SET utf8 COLLATE utf8_unicode_ci */');

            $query=trim(str_replace($search, $replace, $schema));
            return $query;
      }
}
?>

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