dbo_sybase.php

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<?php
/* SVN FILE: $Id: dbo_sybase.php 7847 2008-11-08 02:54:07Z renan.saddam $ */
/**
 * Sybase layer for DBO
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs.model.datasources.dbo
 * @since         CakePHP(tm) v 1.2.0.3097
 * @version       $Revision: 7847 $
 * @modifiedby    $LastChangedBy: renan.saddam $
 * @lastmodified  $Date: 2008-11-07 21:54:07 -0500 (Fri, 07 Nov 2008) $
 * @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.datasources.dbo
 */
class DboSybase extends DboSource {
/**
 * Driver description
 *
 * @var string
 */
    var $description = "Sybase DBO Driver";
/**
 * Start quote for quoted identifiers
 *
 * @var string
 */
    var $startQuote = "";
/**
 * End quote for quoted identifiers
 *
 * @var string
 */
    var $endQuote = "";
/**
 * Base configuration settings for Sybase driver
 *
 * @var array
 */
    var $_baseConfig = array(
        'persistent' => true,
        'host' => 'localhost',
        'login' => 'sa',
        'password' => '',
        'database' => 'cake',
        'port' => '4100'
    );
/**
 * Sybase column definition
 *
 * @var array
 */
    var $columns = array(
        'primary_key' => array('name' => 'numeric(9,0) IDENTITY PRIMARY KEY'),
        'string' => array('name' => 'varchar', 'limit' => '255'),
        'text' => array('name' => 'text'),
        'integer' => array('name' => 'int', 'limit' => '11', 'formatter' => 'intval'),
        'float' => array('name' => 'float', 'formatter' => 'floatval'),
        'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
        'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
        'time' => array('name' => 'datetime', 'format' => 'H:i:s', 'formatter' => 'date'),
        'date' => array('name' => 'datetime', 'format' => 'Y-m-d', 'formatter' => 'date'),
        'binary' => array('name' => 'image'),
        'boolean' => array('name' => 'bit')
    );
/**
 * 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;
        $this->connected = false;

        if (!$config['persistent']) {
            $this->connection = sybase_connect($config['host'], $config['login'], $config['password'], true);
        } else {
            $this->connection = sybase_pconnect($config['host'], $config['login'], $config['password']);
        }

        if (sybase_select_db($config['database'], $this->connection)) {
            $this->connected = true;
        }
        return $this->connected;
    }
/**
 * Disconnects from database.
 *
 * @return boolean True if the database could be disconnected, else false
 */
    function disconnect() {
        $this->connected = !@sybase_close($this->connection);
        return !$this->connected;
    }
/**
 * Executes given SQL statement.
 *
 * @param string $sql SQL statement
 * @return resource Result resource identifier
 * @access protected
 */
    function _execute($sql) {
        return sybase_query($sql, $this->connection);
    }
/**
 * 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 = $this->_execute("select name from sysobjects where type='U'");
        if (!$result) {
            return array();
        } else {

            $tables = array();
            while ($line = sybase_fetch_array($result)) {
                $tables[] = $line[0];
            }

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

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

        $fields = false;
        $cols = $this->query('DESC ' . $this->fullTableName($model));

        foreach ($cols as $column) {
            $colKey = array_keys($column);
            if (isset($column[$colKey[0]]) && !isset($column[0])) {
                $column[0] = $column[$colKey[0]];
            }
            if (isset($column[0])) {
                $fields[$column[0]['Field']] = array('type' => $this->column($column[0]['Type']),
                                                    'null' => $column[0]['Null'],
                                                    'length' => $this->length($column[0]['Type']),
                                                    );
            }
        }

        $this->__cacheDescription($model->tablePrefix.$model->table, $fields);
        return $fields;
    }
/**
 * 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
 * @param boolean $safe Whether or not numeric data should be handled automagically if no column data is provided
 * @return string Quoted and escaped data
 */
    function value($data, $column = null, $safe = false) {
        $parent = parent::value($data, $column, $safe);

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

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

        if ($data === '') {
            return  "''";
        }

        switch ($column) {
            case 'boolean':
                $data = $this->boolean((bool)$data);
            break;
            default:
                $data = str_replace("'", "''", $data);
            break;
        }

        return "'" . $data . "'";
    }
/**
 * 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($model)) {
            if ($this->execute('BEGIN TRAN')) {
                $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)) {
            $this->_transactionStarted = false;
            return $this->execute('COMMIT TRAN');
        }
        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)) {
            return $this->execute('ROLLBACK TRAN');
        }
        return false;
    }
/**
 * Returns a formatted error message from previous database operation.
 *
 * @todo not implemented
 * @return string Error message with error number
 */
    function lastError() {
        return null;
    }
/**
 * Returns number of affected rows in previous database operation. If no previous operation exists,
 * this returns false.
 *
 * @return integer Number of affected rows
 */
    function lastAffected() {
        if ($this->_result) {
            return sybase_affected_rows($this->connection);
        }
        return null;
    }
/**
 * Returns number of rows in previous resultset. If no previous resultset exists,
 * this returns false.
 *
 * @return integer Number of rows in resultset
 */
    function lastNumRows() {
        if ($this->hasResult()) {
            return @sybase_num_rows($this->_result);
        }
        return null;
    }
/**
 * Returns the ID generated from the previous INSERT operation.
 *
 * @param unknown_type $source
 * @return in
 */
    function lastInsertId($source = null) {
        $result=$this->fetchRow('SELECT @@IDENTITY');
        return $result[0];
    }
/**
 * Converts database-layer column types to basic types
 *
 * @param string $real Real database-layer column type (i.e. "varchar(255)")
 * @return string Abstract column type (i.e. "string")
 */
    function column($real) {
        if (is_array($real)) {
            $col = $real['name'];
            if (isset($real['limit']))
            {
                $col .= '('.$real['limit'].')';
            }
            return $col;
        }

        $col = str_replace(')', '', $real);
        $limit = null;
        if (strpos($col, '(') !== false) {
            list($col, $limit) = explode('(', $col);
        }

        if (in_array($col, array('datetime', 'smalldatetime'))) {
            return 'datetime';
        } elseif (in_array($col, array('int', 'bigint', 'smallint', 'tinyint'))) {
            return 'integer';
        } elseif (in_array($col, array('float', 'double', 'real', 'decimal', 'money', 'numeric', 'smallmoney'))) {
            return 'float';
        } elseif (strpos($col, 'text') !== false) {
            return 'text';
        } elseif (in_array($col, array('char', 'nchar', 'nvarchar', 'string', 'varchar'))) {
            return 'binary';
        } elseif (in_array($col, array('binary', 'image', 'varbinary'))) {
            return 'binary';
        }

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

        while ($j < $num_fields) {

            $column = sybase_fetch_field($results,$j);
            if (!empty($column->table)) {
                $this->map[$index++] = array($column->table, $column->name);
            } else {
                $this->map[$index++] = array(0, $column->name);
            }
            $j++;
        }
    }
/**
 * Fetches the next row from the current result set
 *
 * @return unknown
 */
    function fetchResult() {
        if ($row = sybase_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;
        }
    }
}
?>

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