CI3 => CI4

www-api/system/database/RawSql.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Database;
+
+class RawSql
+{
+    /**
+     * @var string Raw SQL string
+     */
+    private string $string;
+
+    public function __construct(string $sqlString)
+    {
+        $this->string = $sqlString;
+    }
+
+    public function __toString(): string
+    {
+        return $this->string;
+    }
+
+    /**
+     * Create new instance with new SQL string
+     */
+    public function with(string $newSqlString): self
+    {
+        $new         = clone $this;
+        $new->string = $newSqlString;
+
+        return $new;
+    }
+
+    /**
+     * Returns unique id for binding key
+     */
+    public function getBindingKey(): string
+    {
+        return 'RawSql' . spl_object_id($this);
+    }
+}