diff options
Diffstat (limited to 'system/drivers/DB_odbc.php')
| -rw-r--r-- | system/drivers/DB_odbc.php | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/system/drivers/DB_odbc.php b/system/drivers/DB_odbc.php new file mode 100644 index 000000000..fac44904b --- /dev/null +++ b/system/drivers/DB_odbc.php @@ -0,0 +1,468 @@ +<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); +/** + * Code Igniter + * + * An open source application development framework for PHP 4.3.2 or newer + * + * @package CodeIgniter + * @author Rick Ellis + * @copyright Copyright (c) 2006, pMachine, Inc. + * @license http://www.codeignitor.com/user_guide/license.html + * @link http://www.codeigniter.com + * @since Version 1.0 + * @filesource + */ + +// ------------------------------------------------------------------------ + +/** + * ODBC Database Adapter Class + * + * Note: _DB is an extender class that the app controller + * creates dynamically based on whether the active record + * class is being used or not. + * + * @package CodeIgniter + * @subpackage Drivers + * @category Database + * @author Rick Ellis + * @link http://www.codeigniter.com/user_guide/libraries/database/ + */ +class CI_DB_odbc extends CI_DB { + + /** + * Non-persistent database connection + * + * @access private called by the base class + * @return resource + */ + function db_connect() + { + return odbc_connect($this->database, $this->username, $this->password); + } + + // -------------------------------------------------------------------- + + /** + * Persistent database connection + * + * @access private called by the base class + * @return resource + */ + function db_pconnect() + { + return odbc_pconnect($this->database, $this->username, $this->password); + } + + // -------------------------------------------------------------------- + + /** + * Select the database + * + * @access private called by the base class + * @return resource + */ + function db_select() + { + // Not needed for ODBC + return TRUE; + } + + // -------------------------------------------------------------------- + + /** + * Execute the query + * + * @access private called by the base class + * @param string an SQL query + * @return resource + */ + function execute($sql) + { + $sql = $this->_prep_query($sql); + return @odbc_exec($this->conn_id, $sql); + } + + // -------------------------------------------------------------------- + + /** + * Prep the query + * + * If needed, each database adapter can prep the query string + * + * @access private called by execute() + * @param string an SQL query + * @return string + */ + function &_prep_query($sql) + { + return $sql; + } + + // -------------------------------------------------------------------- + + /** + * Escape String + * + * @access public + * @param string + * @return string + */ + function escape_str($str) + { + // ODBC doesn't require escaping + return $str; + } + + // -------------------------------------------------------------------- + + /** + * Close DB Connection + * + * @access public + * @param resource + * @return void + */ + function destroy($conn_id) + { + odbc_close($conn_id); + } + + // -------------------------------------------------------------------- + + /** + * Affected Rows + * + * @access public + * @return integer + */ + function affected_rows() + { + return @odbc_num_rows($this->conn_id); + } + + // -------------------------------------------------------------------- + + /** + * Insert ID + * + * @access public + * @return integer + */ + function insert_id() + { + return @odbc_insert_id($this->conn_id); + } + + // -------------------------------------------------------------------- + + /** + * "Count All" query + * + * Generates a platform-specific query string that counts all records in + * the specified database + * + * @access public + * @param string + * @return string + */ + function count_all($table = '') + { + if ($table == '') + return '0'; + + $query = $this->query("SELECT COUNT(*) AS numrows FROM `".$this->dbprefix.$table."`"); + + if ($query->num_rows() == 0) + return '0'; + + $row = $query->row(); + return $row->numrows; + } + + // -------------------------------------------------------------------- + + /** + * The error message string + * + * @access public + * @return string + */ + function error_message() + { + return odbc_errormsg($this->conn_id); + } + + // -------------------------------------------------------------------- + + /** + * The error message number + * + * @access public + * @return integer + */ + function error_number() + { + return odbc_error($this->conn_id); + } + + // -------------------------------------------------------------------- + + /** + * Escape Table Name + * + * This function adds backticks if the table name has a period + * in it. Some DBs will get cranky unless periods are escaped + * + * @access public + * @param string the table name + * @return string + */ + function escape_table($table) + { + if (stristr($table, '.')) + { + $table = preg_replace("/\./", "`.`", $table); + } + + return $table; + } + + // -------------------------------------------------------------------- + + /** + * Field data query + * + * Generates a platform-specific query so that the column data can be retrieved + * + * @access public + * @param string the table name + * @return object + */ + function _field_data($table) + { + $sql = "SELECT TOP 1 FROM ".$this->escape_table($table); + $query = $this->query($sql); + return $query->field_data(); + } + + // -------------------------------------------------------------------- + + /** + * Insert statement + * + * Generates a platform-specific insert string from the supplied data + * + * @access public + * @param string the table name + * @param array the insert keys + * @param array the insert values + * @return string + */ + function _insert($table, $keys, $values) + { + return "INSERT INTO ".$this->escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; + } + + // -------------------------------------------------------------------- + + /** + * Update statement + * + * Generates a platform-specific update string from the supplied data + * + * @access public + * @param string the table name + * @param array the update data + * @param array the where clause + * @return string + */ + function _update($table, $values, $where) + { + foreach($values as $key => $val) + { + $valstr[] = $key." = ".$val; + } + + return "UPDATE ".$this->escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where); + } + + // -------------------------------------------------------------------- + + /** + * Delete statement + * + * Generates a platform-specific delete string from the supplied data + * + * @access public + * @param string the table name + * @param array the where clause + * @return string + */ + function _delete($table, $where) + { + return "DELETE FROM ".$this->escape_table($table)." WHERE ".implode(" ", $where); + } + + // -------------------------------------------------------------------- + + /** + * Version number query string + * + * @access public + * @return string + */ + function _version() + { + return "SELECT version() AS ver"; + } + + // -------------------------------------------------------------------- + + /** + * Show table query + * + * Generates a platform-specific query string so that the table names can be fetched + * + * @access public + * @return string + */ + function _show_tables() + { + return "SHOW TABLES FROM `".$this->database."`"; + } + + // -------------------------------------------------------------------- + + /** + * Show columnn query + * + * Generates a platform-specific query string so that the column names can be fetched + * + * @access public + * @param string the table name + * @return string + */ + function _show_columns($table = '') + { + return "SHOW COLUMNS FROM ".$this->escape_table($table); + } + + // -------------------------------------------------------------------- + + /** + * Limit string + * + * Generates a platform-specific LIMIT clause + * + * @access public + * @param string the sql query string + * @param integer the number of rows to limit the query to + * @param integer the offset value + * @return string + */ + function _limit($sql, $limit, $offset) + { + // Does ODBC doesn't use the LIMIT clause? + return $sql; + } + +} + + +/** + * ODBC Result Class + * + * This class extends the parent result class: CI_DB_result + * + * @category Database + * @author Rick Ellis + * @link http://www.codeigniter.com/user_guide/libraries/database/ + */ +class CI_DB_odbc_result extends CI_DB_result { + + /** + * Number of rows in the result set + * + * @access public + * @return integer + */ + function num_rows() + { + return @odbc_num_rows($this->result_id); + } + + // -------------------------------------------------------------------- + + /** + * Number of fields in the result set + * + * @access public + * @return integer + */ + function num_fields() + { + return @odbc_num_fields($this->result_id); + } + + // -------------------------------------------------------------------- + + /** + * Field data + * + * Generates an array of objects containing field meta-data + * + * @access public + * @return array + */ + function field_data() + { + $retval = array(); + for ($i = 0; $i < $this->num_fields(); $i++) + { + $F = new CI_DB_field(); + $F->name = odbc_field_name($this->result_id, $i); + $F->type = odbc_field_type($this->result_id, $i); + $F->max_length = odbc_field_len($this->result_id, $i); + $F->primary_key = 0; + $F->default = ''; + + $retval[] = $F; + } + + return $retval; + } + + // -------------------------------------------------------------------- + + /** + * Result - associative array + * + * Returns the result set as an array + * + * @access private + * @return array + */ + function _fetch_assoc() + { + return odbc_fetch_array($this->result_id); + } + + // -------------------------------------------------------------------- + + /** + * Result - object + * + * Returns the result set as an object + * + * @access private + * @return object + */ + function _fetch_object() + { + return odbc_fetch_object($this->result_id); + } + +} + +?>
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