Throw exception for unsupported lateral joins on MariaDB (laravel#50279)

src/Illuminate/Database/Query/Grammars/MariaDbGrammar.php

@@ -3,6 +3,8 @@
 namespace Illuminate\Database\Query\Grammars;
 
 use Illuminate\Database\Query\Builder;
+use Illuminate\Database\Query\JoinLateralClause;
+use RuntimeException;
 
 class MariaDbGrammar extends MySqlGrammar
 {
@@ -16,4 +18,18 @@ public function useLegacyGroupLimit(Builder $query)
     {
         return false;
     }
+
+    /**
+     * Compile a "lateral join" clause.
+     *
+     * @param  \Illuminate\Database\Query\JoinLateralClause  $join
+     * @param  string  $expression
+     * @return string
+     *
+     * @throws \RuntimeException
+     */
+    public function compileJoinLateral(JoinLateralClause $join, string $expression): string
+    {
+        throw new RuntimeException('This database engine does not support lateral joins.');
+    }
 }

tests/Database/DatabaseQueryBuilderTest.php

@@ -11,6 +11,7 @@
 use Illuminate\Database\Query\Builder;
 use Illuminate\Database\Query\Expression as Raw;
 use Illuminate\Database\Query\Grammars\Grammar;
+use Illuminate\Database\Query\Grammars\MariaDbGrammar;
 use Illuminate\Database\Query\Grammars\MySqlGrammar;
 use Illuminate\Database\Query\Grammars\PostgresGrammar;
 use Illuminate\Database\Query\Grammars\SQLiteGrammar;
@@ -2572,6 +2573,16 @@ public function testJoinLateral()
         $builder->from('users')->joinLateral(['foo'], 'sub');
     }
 
+    public function testJoinLateralMariaDb()
+    {
+        $this->expectException(RuntimeException::class);
+        $builder = $this->getMariaDbBuilder();
+        $builder->getConnection()->shouldReceive('getDatabaseName');
+        $builder->from('users')->joinLateral(function ($q) {
+            $q->from('contacts')->whereColumn('contracts.user_id', 'users.id');
+        }, 'sub')->toSql();
+    }
+
     public function testJoinLateralSQLite()
     {
         $this->expectException(RuntimeException::class);
@@ -5992,6 +6003,14 @@ protected function getMySqlBuilder()
         return new Builder(m::mock(ConnectionInterface::class), $grammar, $processor);
     }
 
+    protected function getMariaDbBuilder()
+    {
+        $grammar = new MariaDbGrammar;
+        $processor = m::mock(Processor::class);
+
+        return new Builder(m::mock(ConnectionInterface::class), $grammar, $processor);
+    }
+
     protected function getSQLiteBuilder()
     {
         $grammar = new SQLiteGrammar;