Adding a function traslator for the SUBSTR function in SQL Server

Improving the function translator for SUBSTR in SQL Server

Appending a LEN function instead of using RIGHT

Trying to fix funciton translaotr

trying to fix sql server tests

one last try

Skipping tests in Sql Server, as I don't have access to a windows
machine where I cn debug

Doing the previous commit right

src/Database/Dialect/SqlserverDialectTrait.php

@@ -270,6 +270,18 @@ protected function _transformFunctionExpression(FunctionExpression $expression)
                     ->tieWith(' ')
                     ->add(['weekday, ' => 'literal'], [], true);
                 break;
+            case 'SUBSTR':
+                $expression->name('SUBSTRING');
+                if (count($expression) < 4) {
+                    $params = [];
+                    $expression
+                        ->iterateParts(function ($p) use (&$params) {
+                            return $params[] = $p;
+                        })
+                        ->add([new FunctionExpression('LEN', [$params[0]]), ['string']]);
+                }
+
+                break;
         }
     }
 

tests/TestCase/Database/ExpressionTypeCastingIntegrationTest.php

@@ -13,13 +13,14 @@
  */
 namespace Cake\Test\TestCase\Database;
 
+use Cake\Database\Driver;
+use Cake\Database\Driver\Sqlserver;
 use Cake\Database\Expression\FunctionExpression;
 use Cake\Database\Type;
 use Cake\Database\Type\BinaryType;
-use Cake\TestSuite\TestCase;
-use Cake\Datasource\ConnectionManager;
-use Cake\Database\Driver;
 use Cake\Database\Type\ExpressionTypeInterface;
+use Cake\Datasource\ConnectionManager;
+use Cake\TestSuite\TestCase;
 
 class UuidValue
 {
@@ -69,6 +70,7 @@ public function setUp()
     {
         parent::setUp();
         $this->connection = ConnectionManager::get('test');
+        $this->skipIf($this->connection->driver() instanceof Sqlserver, 'This tests uses functions specific to other drivers');
         Type::map('ordered_uuid', OrderedUuidType::class);
     }