Fixed groupLimit functionality (#87)

This functionality was added in Laravel 11.
MySQL driver checks the version of the database and if it is less than 8 then generates a query with unsupported syntax for UDV.
It seems that functionality for MySQL >= 8 works well with SingleStore.
Added test that checks this.

---------

Co-authored-by: AdalbertMemSQL <[email protected]>

src/Connect/Connector.php

@@ -4,6 +4,4 @@
 
 use Illuminate\Database\Connectors\MySqlConnector;
 
-class Connector extends MySqlConnector
-{
-}
+class Connector extends MySqlConnector {}

src/Exceptions/SingleStoreDriverException.php

@@ -2,6 +2,4 @@
 
 namespace SingleStore\Laravel\Exceptions;
 
-class SingleStoreDriverException extends \Exception
-{
-}
+class SingleStoreDriverException extends \Exception {}

src/Exceptions/UnsupportedFunctionException.php

@@ -2,6 +2,4 @@
 
 namespace SingleStore\Laravel\Exceptions;
 
-class UnsupportedFunctionException extends SingleStoreDriverException
-{
-}
+class UnsupportedFunctionException extends SingleStoreDriverException {}

src/Fluency/SpatialIndexCommand.php

@@ -7,6 +7,4 @@
 /**
  * @method $this resolution(int $resolution) The spatial index resolution
  */
-class SpatialIndexCommand extends Fluent
-{
-}
+class SpatialIndexCommand extends Fluent {}

src/Query/Grammar.php

@@ -271,4 +271,9 @@ protected function compileDeleteWithJoins(Builder $query, $table, $where): strin
 
         return "delete {$deleteTable} from {$table} {$joins} {$where}";
     }
+
+    public function useLegacyGroupLimit(Builder $query)
+    {
+        return false;
+    }
 }

tests/Hybrid/GroupLimitTest.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace SingleStore\Laravel\Tests\Hybrid;
+
+use Illuminate\Foundation\Application;
+use Illuminate\Support\Facades\DB;
+use SingleStore\Laravel\Schema\Blueprint;
+use SingleStore\Laravel\Tests\BaseTest;
+
+class GroupLimitTest extends BaseTest
+{
+    use HybridTestHelpers;
+
+    /** @test */
+    public function groupLimit()
+    {
+        if (version_compare(Application::VERSION, '11.0.0', '<')) {
+            // fulltext not added until later on in laravel 8 releases
+            $this->markTestSkipped('requires higher laravel version');
+
+            return;
+        }
+
+        $query = DB::table('test')->orderBy('id')->groupLimit(2, 'group');
+        $this->assertEquals(
+            'select * from (select *, row_number() over (partition by `group` order by `id` asc) as `laravel_row` from `test`) as `laravel_table` where `laravel_row` <= 2 order by `laravel_row`',
+            $query->toSql()
+        );
+
+        if (! $this->runHybridIntegrations()) {
+            return;
+        }
+
+        $this->createTable(function (Blueprint $table) {
+            $table->id();
+            $table->integer('group');
+        });
+
+        DB::table('test')->insert([
+            ['id' => 1, 'group' => 1],
+            ['id' => 2, 'group' => 1],
+            ['id' => 3, 'group' => 1],
+            ['id' => 4, 'group' => 2],
+            ['id' => 5, 'group' => 3],
+            ['id' => 6, 'group' => 3],
+            ['id' => 7, 'group' => 3],
+            ['id' => 8, 'group' => 3],
+        ]);
+
+        $ids = $query->get(['id'])->pluck('id')->toArray();
+        sort($ids);
+        $this->assertEquals($ids, [1, 2, 4, 5, 6]);
+    }
+}