When dropping schema, drop sequences before tables

When dropping a schema, the DBAL explicitly drops all schema sequences,
even if they are owned by one of the tables being dropped.

As a workaround for the regression, we will drop sequences first,
which is how it is implemented in `DropSchemaSqlCollector`.

Co-authored-by: HypeMC <hypemc@gmail.com>

src/SQL/Builder/DropSchemaObjectsSQLBuilder.php

@@ -27,8 +27,8 @@ public function __construct(AbstractPlatform $platform)
     public function buildSQL(Schema $schema): array
     {
         return array_merge(
-            $this->buildTableStatements($schema->getTables()),
             $this->buildSequenceStatements($schema->getSequences()),
+            $this->buildTableStatements($schema->getTables()),
             $this->buildNamespaceStatements($schema->getNamespaces()),
         );
     }

tests/Functional/Schema/SchemaManagerFunctionalTestCase.php

@@ -1592,6 +1592,27 @@ public function testPrimaryKeyAutoIncrement(): void
         self::assertGreaterThan($lastUsedIdBeforeDelete, $lastUsedIdAfterDelete);
     }
 
+    public function testDropWithAutoincrement(): void
+    {
+        $this->dropTableIfExists('test_autoincrement');
+
+        $schema = new Schema();
+        $table  = $schema->createTable('test_autoincrement');
+        $table->addColumn('id', 'integer', [
+            'notnull' => true,
+            'autoincrement' => true,
+        ]);
+        $table->setPrimaryKey(['id']);
+
+        $schemaManager = $this->connection->createSchemaManager();
+        $schemaManager->createSchemaObjects($schema);
+
+        $schema = $schemaManager->createSchema();
+        $schemaManager->dropSchemaObjects($schema);
+
+        self::assertFalse($schemaManager->tablesExist(['test_autoincrement']));
+    }
+
     public function testGenerateAnIndexWithPartialColumnLength(): void
     {
         if (! $this->connection->getDatabasePlatform()->supportsColumnLengthIndexes()) {