hostname, $this->username, $this->password); } // -------------------------------------------------------------------- /** * Persistent database connection * * @access private called by the base class * @return resource */ function db_pconnect() { return mssql_pconnect($this->hostname, $this->username, $this->password); } // -------------------------------------------------------------------- /** * Select the database * * @access private called by the base class * @return resource */ function db_select() { return @mssql_select_db($this->database, $this->conn_id); } // -------------------------------------------------------------------- /** * Execute the query * * @access private called by the base class * @param string an SQL query * @return resource */ function execute($sql) { $sql = $this->_prep_query($sql); return @mssql_query($sql, $this->conn_id); } // -------------------------------------------------------------------- /** * Prep the query * * If needed, each database adapter can prep the query string * * @access private called by execute() * @param string an SQL query * @return string */ function &_prep_query($sql) { return $sql; } // -------------------------------------------------------------------- /** * Escape String * * @access public * @param string * @return string */ function escape_str($str) { // MS SQL doesn't require escaping return $str; } // -------------------------------------------------------------------- /** * Close DB Connection * * @access public * @param resource * @return void */ function destroy($conn_id) { mssql_close($conn_id); } // -------------------------------------------------------------------- /** * Affected Rows * * @access public * @return integer */ function affected_rows() { return @mssql_rows_affected($this->conn_id); } // -------------------------------------------------------------------- /** * Insert ID * * @access public * @return integer */ function insert_id() { // Not supported in MS SQL? return 0; } // -------------------------------------------------------------------- /** * "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 $row->numrows; } // -------------------------------------------------------------------- /** * The error message string * * @access public * @return string */ function error_message() { // Are errros even supported in MS SQL? return ''; } // -------------------------------------------------------------------- /** * The error message number * * @access public * @return integer */ function error_number() { // Are error numbers supported? return ''; } // -------------------------------------------------------------------- /** * Escape Table Name * * This function adds backticks if the table name has a period * in it. Some DBs will get cranky unless periods are escaped * * @access public * @param string the table name * @return string */ function escape_table($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(" ", $where); } // -------------------------------------------------------------------- /** * Version number query string * * @access public * @return string */ function _version() { return "SELECT version() AS ver"; } // -------------------------------------------------------------------- /** * Show table query * * Generates a platform-specific query string so that the table names can be fetched * * @access public * @return string */ function _show_tables() { return "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name"; } // -------------------------------------------------------------------- /** * Show columnn query * * Generates a platform-specific query string so that the column names can be fetched * * @access public * @param string the table name * @return string */ function _show_columns($table = '') { return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->escape_table($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) { $i = $limit + $offset; return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$i.' ', $sql); } } /** * MS SQL Result Class * * This class extends the parent result class: CI_DB_result * * @category Database * @author Rick Ellis * @link http://www.codeigniter.com/user_guide/libraries/database/ */ class CI_DB_mssql_result extends CI_DB_result { /** * Number of rows in the result set * * @access public * @return integer */ function num_rows() { return @mssql_num_rows($this->result_id); } // -------------------------------------------------------------------- /** * Number of fields in the result set * * @access public * @return integer */ function num_fields() { return @mssql_num_fields($this->result_id); } // -------------------------------------------------------------------- /** * Field data * * Generates an array of objects containing field meta-data * * @access public * @return array */ function field_data() { $retval = array(); while ($field = mssql_fetch_field($this->result_id)) { $F = new CI_DB_field(); $F->name = $field->name; $F->type = $field->type; $F->max_length = $field->max_length; $F->primary_key = 0; $F->default = ''; $retval[] = $F; } return $retval; } // -------------------------------------------------------------------- /** * Result - associative array * * Returns the result set as an array * * @access private * @return array */ function _fetch_assoc() { return mssql_fetch_assoc($this->result_id); } // -------------------------------------------------------------------- /** * Result - object * * Returns the result set as an object * * @access private * @return object */ function _fetch_object() { return mssql_fetch_object($this->result_id); } } ?>