username, $this->password, $this->hostname); } // -------------------------------------------------------------------- /** * Persistent database connection * * @access private called by the base class * @return resource */ function db_pconnect() { return ociplogon($this->username, $this->password, $this->hostname); } // -------------------------------------------------------------------- /** * Select the database * * @access private called by the base class * @return resource */ function db_select() { return TRUE; } // -------------------------------------------------------------------- /** * Execute the query * * @access private called by the base class * @param string an SQL query * @return resource */ function _execute($sql) { // oracle must parse the query before it // is run, all of the actions with // the query are based off the statement id // returned by ociparse $this->_set_stmt_id($sql); ocisetprefetch($this->stmt_id, 1000); return @ociexecute($this->stmt_id, $this->_commit); } /** * Generate a statement ID * * @access private * @param string an SQL query * @return none */ function _set_stmt_id($sql) { if ( ! is_resource($this->stmt_id)) { $this->stmt_id = ociparse($this->conn_id, $this->_prep_query($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; } // -------------------------------------------------------------------- /** * getCursor. Returns a cursor from the datbase * * @access public * @return cursor id */ function get_cursor() { return $this->curs_id = ocinewcursor($this->conn_id); } // -------------------------------------------------------------------- /** * Stored Procedure. Executes a stored procedure * * @access public * @param package package stored procedure is in * @param procedure stored procedure to execute * @param params array of parameters * @return array * * params array keys * * KEY OPTIONAL NOTES * name no the name of the parameter should be in : format * value no the value of the parameter. If this is an OUT or IN OUT parameter, * this should be a reference to a variable * type yes the type of the parameter * length yes the max size of the parameter */ function stored_procedure($package, $procedure, $params) { if ($package == '' OR $procedure == '' OR ! is_array($params)) { if ($this->db_debug) { log_message('error', 'Invalid query: '.$package.'.'.$procedure); return $this->display_error('db_invalid_query'); } return FALSE; } // build the query string $sql = "begin $package.$procedure("; $have_cursor = FALSE; foreach($params as $param) { $sql .= $param['name'] . ","; if (array_key_exists('type', $param) && ($param['type'] == OCI_B_CURSOR)) { $have_cursor = TRUE; } } $sql = trim($sql, ",") . "); end;"; $this->stmt_id = FALSE; $this->_set_stmt_id($sql); $this->_bind_params($params); $this->query($sql, FALSE, $have_cursor); } // -------------------------------------------------------------------- /** * Bind parameters * * @access private * @return none */ function _bind_params($params) { if ( ! is_array($params) OR ! is_resource($this->stmt_id)) { return; } foreach ($params as $param) { foreach (array('name', 'value', 'type', 'length') as $val) { if ( ! isset($param[$val])) { $param[$val] = ''; } } ocibindbyname($this->stmt_id, $param['name'], $param['value'], $param['length'], $param['type']); } } // -------------------------------------------------------------------- /** * Begin Transaction * * @access public * @return bool */ function trans_begin() { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } $this->_commit = OCI_DEFAULT; return TRUE; } // -------------------------------------------------------------------- /** * Commit Transaction * * @access public * @return bool */ function trans_commit() { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } $ret = OCIcommit($this->conn_id); $this->_commit = OCI_COMMIT_ON_SUCCESS; return $ret; } // -------------------------------------------------------------------- /** * Rollback Transaction * * @access public * @return bool */ function trans_rollback() { if ( ! $this->trans_enabled) { return TRUE; } // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { return TRUE; } $ret = OCIrollback($this->conn_id); $this->_commit = OCI_COMMIT_ON_SUCCESS; return $ret; } // -------------------------------------------------------------------- /** * Escape String * * @access public * @param string * @return string */ function escape_str($str) { return $str; } // -------------------------------------------------------------------- /** * Close DB Connection * * @access public * @param resource * @return void */ function destroy($conn_id) { ocilogoff($conn_id); } // -------------------------------------------------------------------- /** * Affected Rows * * @access public * @return integer */ function affected_rows() { return @ocirowcount($this->stmt_id); } // -------------------------------------------------------------------- /** * Insert ID * * @access public * @return integer */ function insert_id() { // not supported in oracle 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 = $this->query("SELECT COUNT(1) AS numrows FROM ".$table); if ($query == FALSE) { return 0; } $row = $query->row(); return $row->NUMROWS; } // -------------------------------------------------------------------- /** * The error message string * * @access public * @return string */ function error_message() { $error = ocierror($this->conn_id); return $error['message']; } // -------------------------------------------------------------------- /** * The error message number * * @access public * @return integer */ function error_number() { $error = ocierror($this->conn_id); return $error['code']; } // -------------------------------------------------------------------- /** * Escape Table Name * * This function adds backticks if the table name has a period * in it. Some DBs will get cranky unless periods are escaped * * @access public * @param string the table name * @return string */ function escape_table($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) { $sql = "SELECT * FROM ".$this->escape_table($table)." where rownum = 1"; $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() { $ver = ociserverversion($this->conn_id); return $ver; } // -------------------------------------------------------------------- /** * Show table query * * Generates a platform-specific query string so that the table names can be fetched * * @access public * @return string */ function _show_tables() { return "select TABLE_NAME FROM ALL_TABLES"; } // -------------------------------------------------------------------- /** * Show columnn query * * Generates a platform-specific query string so that the column names can be fetched * * @access public * @param string the table name * @return string */ function _show_columns($table = '') { return "SELECT COLUMN_NAME FROM all_tab_columns WHERE table_name = '$table'"; } // -------------------------------------------------------------------- /** * Limit string * * Generates a platform-specific LIMIT clause * * @access public * @param string the sql query string * @param integer the number of rows to limit the query to * @param integer the offset value * @return string */ function _limit($sql, $limit, $offset) { $limit = $offset + $limit; $newsql = "SELECT * FROM (select inner_query.*, rownum rnum FROM ($sql) inner_query WHERE rownum < $limit)"; if ($offset != 0) { $newsql .= " WHERE rnum >= $offset"; } // remember that we used limits $this->limit_used = TRUE; return $newsql; } } /** * oci8 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_oci8_result extends CI_DB_result { var $stmt_id; var $curs_id; var $limit_used; /** * Number of rows in the result set * * @access public * @return integer */ function num_rows() { // get the results, count them, // rerun query - otherwise we // won't have data after calling // num_rows() $this->result_array(); $rowcount = count($this->result_array); @ociexecute($this->stmt_id); if ($this->curs_id) { @ociexecute($this->curs_id); } return $rowcount; } // -------------------------------------------------------------------- /** * Number of fields in the result set * * @access public * @return integer */ function num_fields() { $count = @ocinumcols($this->stmt_id); // if we used a limit, we added a field, // subtract it out if ($this->limit_used) { $count = $count - 1; } return $count; } // -------------------------------------------------------------------- /** * Field data * * Generates an array of objects containing field meta-data * * @access public * @return array */ function field_data() { $retval = array(); $fieldCount = $this->num_fields(); for ($c = 1; $c <= $fieldCount; $c++) { $F = new stdClass(); $F->name = ocicolumnname($this->stmt_id, $c); $F->type = ocicolumntype($this->stmt_id, $c); $F->max_length = ocicolumnsize($this->stmt_id, $c); $retval[] = $F; } return $retval; } // -------------------------------------------------------------------- /** * Result - associative array * * Returns the result set as an array * * @access private * @return array */ function _fetch_assoc(&$row) { // if pulling from a cursor, use curs_id if ($this->curs_id) { return ocifetchinto($this->curs_id, $row, OCI_ASSOC + OCI_RETURN_NULLS); } else { return ocifetchinto($this->stmt_id, $row, OCI_ASSOC + OCI_RETURN_NULLS); } } // -------------------------------------------------------------------- /** * Result - object * * Returns the result set as an object * * @access private * @return object */ function _fetch_object() { // the PHP 4 version of the oracle functions do not // have a fetch method so we call the array version // and build an object from that $row = array(); $res = $this->_fetch_assoc($row); if ($res != FALSE) { $obj = new stdClass(); foreach ($row as $key => $value) { $obj->{$key} = $value; } $res = $obj; } return $res; } /** * Query result. "array" version. * * @access public * @return array */ function result_array() { if (count($this->result_array) > 0) { return $this->result_array; } // oracle's fetch functions do not // return arrays, the information // is returned in reference parameters // $row = NULL; while ($this->_fetch_assoc($row)) { $this->result_array[] = $row; } if (count($this->result_array) == 0) { return FALSE; } return $this->result_array; } } ?>