275 lines
7.8 KiB
PHP
275 lines
7.8 KiB
PHP
<?php defined('SYSPATH') or die('No direct access allowed.');
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/**
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* TSM database connection.
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*
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* @package PTA
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* @subpackage TSM
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* @category Drivers
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* @author Deon George
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* @copyright (c) 2010 phpTSMadmin Development Team
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* @license http://phptsmadmin.sf.net/license.html
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*/
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class Database_TSM extends Database {
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// Database in use by each connection
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protected static $_current_databases = array();
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// Use SET NAMES to set the character set
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protected static $_set_names;
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// Identifier for this connection within the PHP driver
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protected $_connection_id;
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// TSM does not use a backtick for identifiers
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protected $_identifier = '';
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// Our TSM Message Format
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private $msg_format = '[A-Z]{3}[0-9]{4}[I|E|W|S]';
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// Our Message Codes stored in the last query
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private $_query_msg_codes = array();
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// Our return code error messages we can ignore
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private $ignore_codes = array(
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'ANS8001I', // Return code %s.
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);
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// Our return code error messages we can ignore
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private $nodata_codes = array(
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'ANR2034E', // SELECT: No match found using this criteria.
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);
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// Our required abstract methods
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public function begin($mode = NULL) {}
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public function commit() {}
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public function rollback() {}
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public function set_charset($charset) {}
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public function connect() {
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if ($this->_connection)
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return;
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// Extract the connection parameters, adding required variabels
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extract($this->_config['connection'] + array(
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'database' => '',
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'hostname' => '',
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'username' => '',
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'password' => '',
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'persistent' => FALSE,
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));
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// Get user login details from user session - these are set by login
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if (! $username)
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$username = Session::instance()->get_once(Kohana::config('auth.session_key'));
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if (! $password)
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$password = Session::instance()->get_once('password');
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// Prevent this information from showing up in traces
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unset($this->_config['connection']['username'], $this->_config['connection']['password']);
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if (! file_exists(Kohana::config('config.client'))) {
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system_message(array('title'=>'Cant find DSMADMC',
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'body'=>sprintf('Unable to find the dsmadmc at <b>%s</b>',Kohana::config('client.config')),
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'type'=>'error'));
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return FALSE;
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}
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if (! $username OR ! $password)
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Request::current()->redirect('/login?need_login=1');
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try {
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if ($persistent) {
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// Create a persistent connection
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throw new Kohana_Exception('Cant do persistant connections');
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} else {
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// Create a connection and force it to be a new link
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$this->_connection = sprintf('%s %s -id=%s -password=%s -displ=list -editor=no -dataonly=YES %s %s ',
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Kohana::config('config.client'),
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$database ? '-server='.$database : '',
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$username,
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$password,
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Kohana::config('config.client_errorlogname') ? sprintf('-errorlogname=%s',Kohana::config('config.client_errorlogname')) : '',
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$database ? sprintf('-se=%s',$database) : ''
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);
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$result = $this->query(Database::SELECT,'SELECT server_name,platform,version,release,level,sublevel FROM status');
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if ($result)
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return TSM::instance()->set($username,$password,$result);
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else
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Request::current()->redirect(Request::detect_uri());
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}
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} catch (ErrorException $e) {
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// No connection exists
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$this->_connection = NULL;
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throw new Database_Exception(':error', array(
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':error' => sprintf('%s error in %s (%s)',$e->getMessage(),$e->getFile(),$e->getLine()),
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),
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$e->getCode());
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}
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// \xFF is a better delimiter, but the PHP driver uses underscore
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$this->_connection_id = sha1($hostname.'_'.$username.'_'.$password);
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if ( ! empty($this->_config['charset'])) {
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// Set the character set
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$this->set_charset($this->_config['charset']);
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}
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}
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private function clear() {
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$this->_query_msg_codes = array();
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}
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public function query($type, $sql, $as_object = FALSE, array $params = NULL) {
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// Make sure the database is connected
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$this->_connection or $this->connect();
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$this->clear();
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if ( ! empty($this->_config['profiling']))
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// Benchmark this query for the current instance
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$benchmark = Profiler::start("Database ({$this->_instance})", $sql);
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// We need to escape any back slashes, since the exec will transpose them
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// @todo Is there a better way of doing this?
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$sql = str_replace('\\','\\\\',$sql);
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// Execute the query
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$stderr = exec($this->_connection.'"'.$sql.'"',$stdout,$rc);
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// Work out our message codes
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$result = array();
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foreach ($stdout as $line)
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if (! preg_match('/^('.$this->msg_format.')\s+/',$line,$matches))
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array_push($result,$line);
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elseif (! in_array($matches[1],$this->ignore_codes))
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array_push($this->_query_msg_codes,$matches[1]);
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// If we got a no data code
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if (array_intersect($this->_query_msg_codes,$this->nodata_codes)) {
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$result = array();
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$rc = 0;
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}
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if ($stderr AND $rc) {
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if (isset($benchmark))
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{
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// This benchmark is worthless
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Profiler::delete($benchmark);
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}
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SystemMessage::TSM_Error($stdout,$sql);
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return FALSE;
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}
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if (isset($benchmark))
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Profiler::stop($benchmark);
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// Set the last query
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$this->last_query = $sql;
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if ($type === Database::SELECT)
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// Return an iterator of results
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return new Database_TSM_Result($result, $sql, $as_object, $params);
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elseif ($type === Database::INSERT)
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throw new Kohana_Exception('Database INSERTS are not supported');
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}
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public function list_tables($like = NULL) {
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if (is_string($like))
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// Search for table names
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$result = $this->query(Database::SELECT, 'SHOW TABLES LIKE '.$this->quote($like), FALSE);
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else
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// Find all table names
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$result = $this->query(Database::SELECT, 'SHOW TABLES', FALSE);
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$tables = array();
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foreach ($result as $row)
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$tables[] = reset($row);
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return $tables;
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}
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public function list_columns($table, $like = NULL, $add_prefix = TRUE) {
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// Quote the table name
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$table = ($add_prefix === TRUE) ? $this->quote_table($table) : $table;
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if (is_string($like))
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// Search for column names
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$result = $this->query(Database::SELECT, 'SHOW FULL COLUMNS FROM '.$table.' LIKE '.$this->quote($like), FALSE);
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else
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// Find all column names
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$result = $this->query(Database::SELECT, sprintf('SELECT * FROM SYSCAT.COLUMNS WHERE TABNAME=\'%s\'',$table), FALSE);
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$count = 0;
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$columns = array();
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foreach ($result as $row) {
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list($type, $length) = $this->_parse_type($row['TYPENAME']);
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$column = $this->datatype($type);
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$column['column_name'] = $row['COLNAME'];
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$column['data_type'] = $type;
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$column['is_nullable'] = ($row['NULLS'] == 'TRUE');
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$column['ordinal_position'] = ++$count;
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switch (strtolower($column['data_type'])) {
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case 'float':
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if (isset($length))
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list($column['numeric_precision'], $column['numeric_scale']) = explode(',', $length);
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break;
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case 'int':
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if (isset($length))
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// MySQL attribute
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$column['display'] = $length;
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break;
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case 'string':
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switch ($column['data_type']) {
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case 'binary':
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case 'varbinary':
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$column['character_maximum_length'] = $length;
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break;
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case 'char':
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case 'varchar':
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$column['character_maximum_length'] = $length;
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case 'text':
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case 'tinytext':
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case 'mediumtext':
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case 'longtext':
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$column['collation_name'] = $row['Collation'];
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break;
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case 'enum':
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case 'set':
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$column['collation_name'] = $row['Collation'];
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$column['options'] = explode('\',\'', substr($length, 1, -1));
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break;
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}
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break;
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}
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// TSM attributes
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$column['comment'] = $row['REMARKS'];
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$columns[$row['COLNAME']] = $column;
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}
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return $columns;
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}
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public function escape($value) {
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// Make sure the database is connected
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$this->_connection or $this->connect();
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// SQL standard is to use single-quotes for all values
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return "'$value'";
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}
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} // End Database_TSM
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