fix: SQLSRV driver's decrement() method

system/Database/SQLSRV/Builder.php

@@ -269,7 +269,7 @@ public function decrement(string $column, int $value = 1)
         if ($this->castTextToInt) {
             $values = [$column => "CONVERT(VARCHAR(MAX),CONVERT(INT,CONVERT(VARCHAR(MAX), {$column})) - {$value})"];
         } else {
-            $values = [$column => "{$column} + {$value}"];
+            $values = [$column => "{$column} - {$value}"];
         }
 
         $sql = $this->_update($this->QBFrom[0], $values);

tests/system/Database/Live/SQLSRV/IncrementTest.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * 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\Live\SQLSRV;
+
+use CodeIgniter\Database\SQLSRV\Builder;
+use CodeIgniter\Test\CIUnitTestCase;
+use CodeIgniter\Test\DatabaseTestTrait;
+use PHPUnit\Framework\Attributes\Group;
+use Tests\Support\Database\Seeds\CITestSeeder;
+
+/**
+ * @internal
+ */
+#[Group('DatabaseLive')]
+final class IncrementTest extends CIUnitTestCase
+{
+    use DatabaseTestTrait;
+
+    protected $refresh = true;
+    protected $seed    = CITestSeeder::class;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        if ($this->db->DBDriver !== 'SQLSRV') {
+            $this->markTestSkipped('This test is only for SQLSRV.');
+        }
+    }
+
+    public function testIncrementWhenCastTextToIntFalse(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'incremental', 'created_at' => 6]);
+
+        $this->assertInstanceOf(Builder::class, $this->db->table('job'));
+
+        $builder = $this->db->table('job');
+
+        $builder->castTextToInt = false;
+
+        $builder->where('name', 'incremental')
+            ->increment('created_at');
+
+        $this->seeInDatabase('job', ['name' => 'incremental', 'created_at' => 7]);
+    }
+
+    public function testDecrementWhenCastTextToIntFalse(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'decremental', 'created_at' => 6]);
+
+        $this->assertInstanceOf(Builder::class, $this->db->table('job'));
+
+        $builder = $this->db->table('job');
+
+        $builder->castTextToInt = false;
+
+        $builder->where('name', 'decremental')
+            ->decrement('created_at');
+
+        $this->seeInDatabase('job', ['name' => 'decremental', 'created_at' => 5]);
+    }
+}

user_guide_src/source/changelogs/v4.7.3.rst

@@ -41,6 +41,7 @@ Bugs Fixed
 - **Commands:** Fixed a bug in the ``env`` command where passing options only would cause the command to throw a ``TypeError`` instead of showing the current environment.
 - **Common:** Fixed a bug where the ``command()`` helper function did not properly clean up output buffers, which could lead to risky tests when exceptions were thrown.
 - **Validation:** Fixed a bug where ``Validation::getValidated()`` dropped fields whose validated value was explicitly ``null``.
+- **SQLSRV Database Driver:** Fixed a bug where the SQLSRV driver's decrement method was adding instead of subtracting the decrement value when ``$castTextToInt`` was false.
 
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_