Result::getColumnMeta is cached (ref #212)

src/Database/Drivers/PDO/Connection.php

@@ -16,6 +16,7 @@
 class Connection implements Drivers\Connection
 {
 	public readonly PDO $pdo;
+	public string $resultClass = Result::class;
 	public string $metaTypeKey = 'native_type';
 
 
@@ -40,7 +41,7 @@ public function query(string $sql, array $params = []): Result
 		}
 
 		$statement->execute();
-		return new Result($statement, $this);
+		return new ($this->resultClass)($statement, $this);
 	}
 
 

src/Database/Drivers/PDO/PgSQL/Driver.php

@@ -29,7 +29,9 @@ public function __construct(
 
 	public function connect(): Drivers\Connection
 	{
-		return new Drivers\PDO\Connection(...$this->params);
+		$connection = new Drivers\PDO\Connection(...$this->params);
+		$connection->resultClass = Result::class;
+		return $connection;
 	}
 
 

src/Database/Drivers/PDO/PgSQL/Result.php

@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Nette\Database\Drivers\PDO\PgSQL;
+
+use Nette\Database\Drivers;
+
+
+class Result extends Drivers\PDO\Result
+{
+	private static array $columnsCache = [];
+
+
+	protected function collectColumnsInfo(): array
+	{
+		return self::$columnsCache[$this->result->queryString] ??= parent::collectColumnsInfo();
+	}
+}