Fix SQLite temp table name must not contain dot (#6315)

|      Q       |   A
|------------- | -----------
| Type         | bug
| Fixed issues | 

#### Summary

Fix invalid SQL generated when table with schema is given. As it was
invalid, this PR is fully BC in sense of the exact generated SQL.

src/Platforms/SqlitePlatform.php

@@ -1150,7 +1150,12 @@ public function getAlterTableSQL(TableDiff $diff)
         $sql      = [];
         $tableSql = [];
         if (! $this->onSchemaAlterTable($diff, $tableSql)) {
-            $dataTable = new Table('__temp__' . $table->getName());
+            $tableName = $table->getName();
+            if (strpos($tableName, '.') !== false) {
+                [, $tableName] = explode('.', $tableName, 2);
+            }
+
+            $dataTable = new Table('__temp__' . $tableName);
 
             $newTable = new Table(
                 $table->getQuotedName($this),

tests/Functional/Schema/SqliteSchemaManagerTest.php

@@ -5,13 +5,17 @@
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\SqlitePlatform;
+use Doctrine\DBAL\Schema\Column;
 use Doctrine\DBAL\Schema\ForeignKeyConstraint;
 use Doctrine\DBAL\Schema\Table;
+use Doctrine\DBAL\Schema\TableDiff;
 use Doctrine\DBAL\Types\BlobType;
 use Doctrine\DBAL\Types\Type;
 use Doctrine\DBAL\Types\Types;
 
+use function array_keys;
 use function array_shift;
+use function assert;
 use function dirname;
 
 class SqliteSchemaManagerTest extends SchemaManagerFunctionalTestCase
@@ -216,6 +220,28 @@ public function testNonSimpleAlterTableCreatedFromDDL(): void
         self::assertSame(['name'], $index->getColumns());
     }
 
+    public function testAlterTableWithSchema(): void
+    {
+        $databasePlatform = $this->connection->getDatabasePlatform();
+        assert($databasePlatform instanceof SqlitePlatform);
+        $databasePlatform->disableSchemaEmulation();
+
+        $this->dropTableIfExists('t');
+
+        $table = new Table('main.t');
+        $table->addColumn('a', Types::INTEGER);
+        $this->schemaManager->createTable($table);
+
+        self::assertSame(['a'], array_keys($this->schemaManager->listTableColumns('t')));
+
+        $tableDiff                      = new TableDiff('t');
+        $tableDiff->fromTable           = $table;
+        $tableDiff->renamedColumns['a'] = new Column('b', Type::getType(Types::INTEGER));
+        $this->schemaManager->alterTable($tableDiff);
+
+        self::assertSame(['b'], array_keys($this->schemaManager->listTableColumns('t')));
+    }
+
     public function testIntrospectMultipleAnonymousForeignKeyConstraints(): void
     {
         $this->dropTableIfExists('album');

tests/Platforms/SqlitePlatformTest.php

@@ -615,6 +615,26 @@ public function getAlterTableRenameColumnSQL(): array
         ];
     }
 
+    public function testGeneratesAlterTableRenameColumnSQLWithSchema(): void
+    {
+        $this->platform->disableSchemaEmulation();
+
+        $table = new Table('main.t');
+        $table->addColumn('a', Types::INTEGER);
+
+        $tableDiff                      = new TableDiff('t');
+        $tableDiff->fromTable           = $table;
+        $tableDiff->renamedColumns['a'] = new Column('b', Type::getType(Types::INTEGER));
+
+        self::assertSame([
+            'CREATE TEMPORARY TABLE __temp__t AS SELECT a FROM main.t',
+            'DROP TABLE main.t',
+            'CREATE TABLE main.t (b INTEGER NOT NULL)',
+            'INSERT INTO main.t (b) SELECT a FROM __temp__t',
+            'DROP TABLE __temp__t',
+        ], $this->platform->getAlterTableSQL($tableDiff));
+    }
+
     /**
      * {@inheritDoc}
      */