Viewing file:  StorageEngine.class.php (13.69 KB) -rw-rw-rw-
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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Library for extracting information about the available storage engines
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* defines
*/
define('PMA_ENGINE_SUPPORT_NO', 0);
define('PMA_ENGINE_SUPPORT_DISABLED', 1);
define('PMA_ENGINE_SUPPORT_YES', 2);
define('PMA_ENGINE_SUPPORT_DEFAULT', 3);
define('PMA_ENGINE_DETAILS_TYPE_PLAINTEXT', 0);
define('PMA_ENGINE_DETAILS_TYPE_SIZE', 1);
define('PMA_ENGINE_DETAILS_TYPE_NUMERIC', 2); //Has no effect yet...
define('PMA_ENGINE_DETAILS_TYPE_BOOLEAN', 3); // 'ON' or 'OFF'
/**
* Base Storage Engine Class
*
* @package PhpMyAdmin
*/
class PMA_StorageEngine
{
/**
* @var string engine name
*/
var $engine = 'dummy';
/**
* @var string engine title/description
*/
var $title = 'PMA Dummy Engine Class';
/**
* @var string engine lang description
*/
var $comment
= 'If you read this text inside phpMyAdmin, something went wrong...';
/**
* @var integer engine supported by current server
*/
var $support = PMA_ENGINE_SUPPORT_NO;
/**
* Constructor
*
* @param string $engine The engine ID
*/
public function __construct($engine)
{
$storage_engines = PMA_StorageEngine::getStorageEngines();
if (! empty($storage_engines[$engine])) {
$this->engine = $engine;
$this->title = $storage_engines[$engine]['Engine'];
$this->comment = (isset($storage_engines[$engine]['Comment'])
? $storage_engines[$engine]['Comment']
: '');
switch ($storage_engines[$engine]['Support']) {
case 'DEFAULT':
$this->support = PMA_ENGINE_SUPPORT_DEFAULT;
break;
case 'YES':
$this->support = PMA_ENGINE_SUPPORT_YES;
break;
case 'DISABLED':
$this->support = PMA_ENGINE_SUPPORT_DISABLED;
break;
case 'NO':
default:
$this->support = PMA_ENGINE_SUPPORT_NO;
}
}
}
/**
* Returns array of storage engines
*
* @static
* @staticvar array $storage_engines storage engines
* @access public
* @return string[] array of storage engines
*/
static public function getStorageEngines()
{
static $storage_engines = null;
if (null == $storage_engines) {
if (PMA_DRIZZLE) {
$sql = "SELECT
p.plugin_name AS Engine,
(CASE
WHEN p.plugin_name = @@storage_engine THEN 'DEFAULT'
WHEN p.is_active THEN 'YES'
ELSE 'DISABLED' END) AS Support,
m.module_description AS Comment
FROM data_dictionary.plugins p
JOIN data_dictionary.modules m USING (module_name)
WHERE p.plugin_type = 'StorageEngine'
AND p.plugin_name NOT IN ('FunctionEngine', 'schema')";
$storage_engines = $GLOBALS['dbi']->fetchResult($sql, 'Engine');
} else {
$storage_engines
= $GLOBALS['dbi']->fetchResult('SHOW STORAGE ENGINES', 'Engine');
}
}
return $storage_engines;
}
/**
* Returns HTML code for storage engine select box
*
* @param string $name The name of the select form element
* @param string $id The ID of the form field
* @param string $selected The selected engine
* @param boolean $offerUnavailableEngines Should unavailable storage
* engines be offered?
*
* @static
* @return string html selectbox
*/
static public function getHtmlSelect(
$name = 'engine', $id = null,
$selected = null, $offerUnavailableEngines = false
) {
$selected = strtolower($selected);
$output = '<select name="' . $name . '"'
. (empty($id) ? '' : ' id="' . $id . '"') . '>' . "\n";
foreach (PMA_StorageEngine::getStorageEngines() as $key => $details) {
// Don't show PERFORMANCE_SCHEMA engine (MySQL 5.5)
// Don't show MyISAM for Drizzle (allowed only for temporary tables)
if (! $offerUnavailableEngines
&& ($details['Support'] == 'NO'
|| $details['Support'] == 'DISABLED'
|| $details['Engine'] == 'PERFORMANCE_SCHEMA')
|| (PMA_DRIZZLE && $details['Engine'] == 'MyISAM')
) {
continue;
}
$output .= ' <option value="' . htmlspecialchars($key) . '"'
. (empty($details['Comment'])
? '' : ' title="' . htmlspecialchars($details['Comment']) . '"')
. (strtolower($key) == $selected
|| (empty($selected) && $details['Support'] == 'DEFAULT')
? ' selected="selected"' : '')
. '>' . "\n"
. ' ' . htmlspecialchars($details['Engine']) . "\n"
. ' </option>' . "\n";
}
$output .= '</select>' . "\n";
return $output;
}
/**
* Loads the corresponding engine plugin, if available.
*
* @param string $engine The engine ID
*
* @static
* @return PMA_StorageEngine The engine plugin
*/
static public function getEngine($engine)
{
$engine = str_replace('/', '', str_replace('.', '', $engine));
$filename = './libraries/engines/' . strtolower($engine) . '.lib.php';
if (file_exists($filename) && include_once $filename) {
switch(strtolower($engine)) {
case 'bdb':
return new PMA_StorageEngine_Bdb($engine);
case 'berkeleydb':
return new PMA_StorageEngine_Berkeleydb($engine);
case 'binlog':
return new PMA_StorageEngine_Binlog($engine);
case 'innobase':
return new PMA_StorageEngine_Innobase($engine);
case 'innodb':
return new PMA_StorageEngine_Innodb($engine);
case 'memory':
return new PMA_StorageEngine_Memory($engine);
case 'merge':
return new PMA_StorageEngine_Merge($engine);
case 'mrg_myisam':
return new PMA_StorageEngine_MrgMyisam($engine);
case 'myisam':
return new PMA_StorageEngine_Myisam($engine);
case 'ndbcluster':
return new PMA_StorageEngine_Ndbcluster($engine);
case 'pbxt':
return new PMA_StorageEngine_Pbxt($engine);
case 'performance_schema':
return new PMA_StorageEngine_PerformanceSchema($engine);
}
} else {
return new PMA_StorageEngine($engine);
}
}
/**
* Returns true if given engine name is supported/valid, otherwise false
*
* @param string $engine name of engine
*
* @static
* @return boolean whether $engine is valid or not
*/
static public function isValid($engine)
{
if ($engine == "PBMS") {
return true;
}
$storage_engines = PMA_StorageEngine::getStorageEngines();
return isset($storage_engines[$engine]);
}
/**
* Returns as HTML table of the engine's server variables
*
* @return string The table that was generated based on the retrieved
* information
*/
public function getHtmlVariables()
{
$odd_row = false;
$ret = '';
foreach ($this->getVariablesStatus() as $details) {
$ret .= '<tr class="' . ($odd_row ? 'odd' : 'even') . '">' . "\n"
. ' <td>' . "\n";
if (! empty($details['desc'])) {
$ret .= ' '
. PMA_Util::showHint($details['desc'])
. "\n";
}
$ret .= ' </td>' . "\n"
. ' <th>' . htmlspecialchars($details['title']) . '</th>'
. "\n"
. ' <td class="value">';
switch ($details['type']) {
case PMA_ENGINE_DETAILS_TYPE_SIZE:
$parsed_size = $this->resolveTypeSize($details['value']);
$ret .= $parsed_size[0] . ' ' . $parsed_size[1];
unset($parsed_size);
break;
case PMA_ENGINE_DETAILS_TYPE_NUMERIC:
$ret .= PMA_Util::formatNumber($details['value']) . ' ';
break;
default:
$ret .= htmlspecialchars($details['value']) . ' ';
}
$ret .= '</td>' . "\n"
. '</tr>' . "\n";
$odd_row = ! $odd_row;
}
if (! $ret) {
$ret = '<p>' . "\n"
. ' '
. __('There is no detailed status information available for this storage engine.')
. "\n"
. '</p>' . "\n";
} else {
$ret = '<table class="data">' . "\n" . $ret . '</table>' . "\n";
}
return $ret;
}
/**
* Returns the engine specific handling for
* PMA_ENGINE_DETAILS_TYPE_SIZE type variables.
*
* This function should be overridden when
* PMA_ENGINE_DETAILS_TYPE_SIZE type needs to be
* handled differently for a particular engine.
*
* @param integer $value Value to format
*
* @return string the formatted value and its unit
*/
public function resolveTypeSize($value)
{
return PMA_Util::formatByteDown($value);
}
/**
* Returns array with detailed info about engine specific server variables
*
* @return array array with detailed info about specific engine server variables
*/
public function getVariablesStatus()
{
$variables = $this->getVariables();
$like = $this->getVariablesLikePattern();
if ($like) {
$like = " LIKE '" . $like . "' ";
} else {
$like = '';
}
$mysql_vars = array();
$sql_query = 'SHOW GLOBAL VARIABLES ' . $like . ';';
$res = $GLOBALS['dbi']->query($sql_query);
while ($row = $GLOBALS['dbi']->fetchAssoc($res)) {
if (isset($variables[$row['Variable_name']])) {
$mysql_vars[$row['Variable_name']]
= $variables[$row['Variable_name']];
} elseif (! $like
&& strpos(strtolower($row['Variable_name']), strtolower($this->engine)) !== 0
) {
continue;
}
$mysql_vars[$row['Variable_name']]['value'] = $row['Value'];
if (empty($mysql_vars[$row['Variable_name']]['title'])) {
$mysql_vars[$row['Variable_name']]['title'] = $row['Variable_name'];
}
if (! isset($mysql_vars[$row['Variable_name']]['type'])) {
$mysql_vars[$row['Variable_name']]['type']
= PMA_ENGINE_DETAILS_TYPE_PLAINTEXT;
}
}
$GLOBALS['dbi']->freeResult($res);
return $mysql_vars;
}
/**
* Reveals the engine's title
*
* @return string The title
*/
public function getTitle()
{
return $this->title;
}
/**
* Fetches the server's comment about this engine
*
* @return string The comment
*/
public function getComment()
{
return $this->comment;
}
/**
* Information message on whether this storge engine is supported
*
* @return string The localized message.
*/
public function getSupportInformationMessage()
{
switch ($this->support) {
case PMA_ENGINE_SUPPORT_DEFAULT:
$message = __('%s is the default storage engine on this MySQL server.');
break;
case PMA_ENGINE_SUPPORT_YES:
$message = __('%s is available on this MySQL server.');
break;
case PMA_ENGINE_SUPPORT_DISABLED:
$message = __('%s has been disabled for this MySQL server.');
break;
case PMA_ENGINE_SUPPORT_NO:
default:
$message = __('This MySQL server does not support the %s storage engine.');
}
return sprintf($message, htmlspecialchars($this->title));
}
/**
* Generates a list of MySQL variables that provide information about this
* engine. This function should be overridden when extending this class
* for a particular engine.
*
* @return array The list of variables.
*/
public function getVariables()
{
return array();
}
/**
* Returns string with filename for the MySQL helppage
* about this storage engine
*
* @return string MySQL help page filename
*/
public function getMysqlHelpPage()
{
return $this->engine . '-storage-engine';
}
/**
* Returns the pattern to be used in the query for SQL variables
* related to the storage engine
*
* @return string SQL query LIKE pattern
*/
public function getVariablesLikePattern()
{
return false;
}
/**
* Returns a list of available information pages with labels
*
* @return string[] The list
*/
public function getInfoPages()
{
return array();
}
/**
* Generates the requested information page
*
* @param string $id The page ID
*
* @return string|boolean The page or false on error.
*/
public function getPage($id)
{
return false;
}
}
?>
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