Viewing file:  TableStats.class.php (4.78 KB) -rw-r--r--
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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Contains abstract class to hold table preferences/statistics
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* Table preferences/statistics
*
* This class preserves the table co-ordinates,fields
* and helps in drawing/generating the tables.
*
* @package PhpMyAdmin
* @abstract
*/
abstract class TableStats
{
protected $diagram;
protected $db;
protected $pageNumber;
protected $tableName;
protected $showKeys;
protected $tableDimension;
public $displayfield;
public $fields = array();
public $primary = array();
public $x, $y;
public $width = 0;
public $heightCell = 0;
protected $offline;
/**
* Constructor
*
* @param object $diagram schema diagram
* @param string $db current db name
* @param integer $pageNumber current page number (from the
* $cfg['Servers'][$i]['table_coords'] table)
* @param string $tableName table name
* @param boolean $showKeys whether to display keys or not
* @param boolean $tableDimension whether to display table position or not
* @param boolean $offline whether the coordinates are sent
* from the browser
*/
public function __construct(
$diagram, $db, $pageNumber, $tableName, $showKeys, $tableDimension, $offline
) {
$this->diagram = $diagram;
$this->db = $db;
$this->pageNumber = $pageNumber;
$this->tableName = $tableName;
$this->showKeys = $showKeys;
$this->tableDimension = $tableDimension;
$this->offline = $offline;
// checks whether the table exists
// and loads fields
$this->validateTableAndLoadFields();
// load table coordinates
$this->loadCoordinates();
// loads display field
$this->loadDisplayField();
// loads primary keys
$this->loadPrimaryKey();
}
/**
* Validate whether the table exists.
*
* @return void
*/
protected function validateTableAndLoadFields()
{
$sql = 'DESCRIBE ' . PMA_Util::backquote($this->tableName);
$result = $GLOBALS['dbi']->tryQuery(
$sql, null, PMA_DatabaseInterface::QUERY_STORE
);
if (! $result || ! $GLOBALS['dbi']->numRows($result)) {
$this->showMissingTableError();
}
if ($this->showKeys) {
$indexes = PMA_Index::getFromTable($this->tableName, $this->db);
$all_columns = array();
foreach ($indexes as $index) {
$all_columns = array_merge(
$all_columns,
array_flip(array_keys($index->getColumns()))
);
}
$this->fields = array_keys($all_columns);
} else {
while ($row = $GLOBALS['dbi']->fetchRow($result)) {
$this->fields[] = $row[0];
}
}
}
/**
* Displays an error when the table cannot be found.
*
* @return void
* @abstract
*/
protected abstract function showMissingTableError();
/**
* Loads coordinates of a table
*
* @return void
*/
protected function loadCoordinates()
{
foreach ($_REQUEST['t_h'] as $key => $value) {
if ($this->db . '.' . $this->tableName == $key) {
$this->x = (double) $_REQUEST['t_x'][$key];
$this->y = (double) $_REQUEST['t_y'][$key];
break;
}
}
}
/**
* Loads the table's display field
*
* @return void
*/
protected function loadDisplayField()
{
$this->displayfield = PMA_getDisplayField($this->db, $this->tableName);
}
/**
* Loads the PRIMARY key.
*
* @return void
*/
protected function loadPrimaryKey()
{
$result = $GLOBALS['dbi']->query(
'SHOW INDEX FROM ' . PMA_Util::backquote($this->tableName) . ';',
null, PMA_DatabaseInterface::QUERY_STORE
);
if ($GLOBALS['dbi']->numRows($result) > 0) {
while ($row = $GLOBALS['dbi']->fetchAssoc($result)) {
if ($row['Key_name'] == 'PRIMARY') {
$this->primary[] = $row['Column_name'];
}
}
}
}
/**
* Returns title of the current table,
* title can have the dimensions/co-ordinates of the table
*
* @return string title of the current table
*/
protected function getTitle()
{
return ($this->tableDimension
? sprintf('%.0fx%0.f', $this->width, $this->heightCell)
: ''
)
. ' ' . $this->tableName;
}
}
?>
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