80 lines
2.1 KiB
PHP
80 lines
2.1 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace PhpMyAdmin;
|
|
|
|
use PhpMyAdmin\Identifiers\DatabaseName;
|
|
use PhpMyAdmin\Identifiers\TableName;
|
|
|
|
use function in_array;
|
|
use function sprintf;
|
|
|
|
final class DbTableExists
|
|
{
|
|
/** @psalm-var list<non-empty-string> */
|
|
private array $databases = [];
|
|
|
|
/** @psalm-var list<non-empty-string> */
|
|
private array $tables = [];
|
|
|
|
public function __construct(private readonly DatabaseInterface $dbi)
|
|
{
|
|
}
|
|
|
|
public function hasDatabase(DatabaseName $databaseName): bool
|
|
{
|
|
if (in_array($databaseName->getName(), $this->databases, true)) {
|
|
return true;
|
|
}
|
|
|
|
if ($this->dbi->selectDb($databaseName)) {
|
|
$this->databases[] = $databaseName->getName();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function hasTable(DatabaseName $database, TableName $table): bool
|
|
{
|
|
if (in_array($database->getName() . '.' . $table->getName(), $this->tables, true)) {
|
|
return true;
|
|
}
|
|
|
|
if (
|
|
$this->hasCachedTableContent($database, $table)
|
|
|| $this->isPermanentTable($table)
|
|
|| $this->isTemporaryTable($table)
|
|
) {
|
|
$this->tables[] = $database->getName() . '.' . $table->getName();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private function hasCachedTableContent(DatabaseName $database, TableName $table): bool
|
|
{
|
|
return (bool) $this->dbi->getCache()->getCachedTableContent([$database->getName(), $table->getName()]);
|
|
}
|
|
|
|
private function isPermanentTable(TableName $table): bool
|
|
{
|
|
$result = $this->dbi->tryQuery(sprintf('SHOW TABLES LIKE %s;', $this->dbi->quoteString($table->getName())));
|
|
|
|
return $result !== false && $result->numRows() > 0;
|
|
}
|
|
|
|
/**
|
|
* SHOW TABLES doesn't show temporary tables, so try select
|
|
* as it can happen just in case temporary table. It should be fast.
|
|
*/
|
|
private function isTemporaryTable(TableName $table): bool
|
|
{
|
|
return $this->dbi->tryQuery(sprintf('SELECT 1 FROM %s LIMIT 1;', Util::backquote($table))) !== false;
|
|
}
|
|
}
|
