Implement the ability for user-defined type casting

src/Connection.php

@@ -31,7 +31,7 @@
         }
 
         if ($this->logger !== null) {
             $command->setLogger($this->logger);
         }
 
         if ($this->profiler !== null) {
@@ -48,7 +48,7 @@
 
     public function getColumnFactory(): ColumnFactoryInterface
     {
-        return new ColumnFactory();
+        return $this->columnFactory ??= new ColumnFactory();
     }
 
     public function getLastInsertID(?string $sequenceName = null): string

tests/ColumnFactoryTest.php

@@ -7,6 +7,7 @@
 use PHPUnit\Framework\Attributes\DataProviderExternal;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Pgsql\Column\ArrayColumn;
+use Yiisoft\Db\Pgsql\Column\ColumnFactory;
 use Yiisoft\Db\Pgsql\Tests\Provider\ColumnFactoryProvider;
 use Yiisoft\Db\Pgsql\Tests\Support\TestTrait;
 use Yiisoft\Db\Schema\Column\ColumnInterface;
@@ -19,6 +20,11 @@ final class ColumnFactoryTest extends AbstractColumnFactoryTest
 {
     use TestTrait;
 
+    protected function getColumnFactoryClass(): string
+    {
+        return ColumnFactory::class;
+    }
+
     #[DataProviderExternal(ColumnFactoryProvider::class, 'dbTypes')]
     public function testFromDbType(string $dbType, string $expectedType, string $expectedInstanceOf): void
     {

tests/ConnectionTest.php

@@ -11,8 +11,10 @@
 use Yiisoft\Db\Exception\InvalidConfigException;
 use Yiisoft\Db\Exception\NotSupportedException;
 use Yiisoft\Db\Pgsql\Column\ColumnFactory;
+use Yiisoft\Db\Pgsql\Connection;
 use Yiisoft\Db\Pgsql\Tests\Support\TestTrait;
 use Yiisoft\Db\Tests\Common\CommonConnectionTest;
+use Yiisoft\Db\Tests\Support\DbHelper;
 use Yiisoft\Db\Transaction\TransactionInterface;
 
 /**
@@ -143,4 +145,15 @@ public function testGetColumnFactory(): void
 
         $db->close();
     }
+
+    public function testUserDefinedColumnFactory(): void
+    {
+        $columnFactory = new ColumnFactory();
+
+        $db = new Connection($this->getDriver(), DbHelper::getSchemaCache(), $columnFactory);
+
+        $this->assertSame($columnFactory, $db->getColumnFactory());
+
+        $db->close();
+    }
 }

tests/Support/TestTrait.php

@@ -83,7 +83,7 @@ public static function setUpBeforeClass(): void
         $db->close();
     }
 
-    private function getDriver(): PdoDriverInterface
+    protected function getDriver(): PdoDriverInterface
     {
         $driver = new Driver($this->getDsn(), self::getUsername(), self::getPassword());
         $driver->charset('utf8');