57 lines
1.4 KiB
PHP
57 lines
1.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace PhpMyAdmin;
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use PhpMyAdmin\Dbal\DatabaseInterface;
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use PhpMyAdmin\Identifiers\DatabaseName;
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use PhpMyAdmin\Identifiers\TableName;
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use function in_array;
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use function sprintf;
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final class DbTableExists
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{
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/** @psalm-var list<non-empty-string> */
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private array $tables = [];
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public function __construct(private readonly DatabaseInterface $dbi)
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{
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}
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public function selectDatabase(DatabaseName $databaseName): bool
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{
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return $this->dbi->selectDb($databaseName);
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}
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/**
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* Check if a table exists in the given database.
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* It will return true if the table exists, regardless if it's temporary or permanent.
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*/
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public function hasTable(DatabaseName $database, TableName $table): bool
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{
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if (in_array($database->getName() . '.' . $table->getName(), $this->tables, true)) {
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return true;
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}
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if ($this->tableExists($database, $table)) {
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$this->tables[] = $database->getName() . '.' . $table->getName();
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return true;
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}
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return false;
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}
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private function tableExists(DatabaseName $database, TableName $table): bool
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{
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// SHOW TABLES doesn't show temporary tables, so try select.
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return $this->dbi->tryQuery(sprintf(
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'SELECT 1 FROM %s.%s LIMIT 1;',
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Util::backquote($database),
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Util::backquote($table),
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)) !== false;
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}
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}
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