messageTableName example

  public function testDestroy() {
    $id_map = $this->getIdMap();
    // Initialize the ID map.     $id_map->getDatabase();
    $map_table_name = $id_map->mapTableName();
    $message_table_name = $id_map->messageTableName();
    $row = new Row(['source_id_property' => 'source_value'], ['source_id_property' => []]);
    $id_map->saveIdMapping($row, ['destination_id_property' => 2]);
    $id_map->saveMessage(['source_id_property' => 'source_value'], 'A message');
    $this->assertTrue($this->database->schema()->tableExists($map_table_name),
                      "$map_table_name exists");
    $this->assertTrue($this->database->schema()->tableExists($message_table_name),
                      "$message_table_name exists");
    $id_map->destroy();
    $this->assertFalse($this->database->schema()->tableExists($map_table_name),
                       "$map_table_name does not exist");
    $this->assertFalse($this->database->schema()->tableExists($message_table_name),
                       "

$mysql_index_error = $pdo_exception instanceof \PDOException && $pdo_exception->getCode() === '42000' && $pdo_exception->errorInfo[1] === 1071;
          $chunk_size--;
          // Rethrow the exception if the source IDs can not be in smaller           // groups.           if (!$mysql_index_error || $chunk_size <= 0) {
            throw $e;
          }
        }
      }

      // Now do the message table.       if (!$this->getDatabase()->schema()->tableExists($this->messageTableName())) {
        $fields = [];
        $fields['msgid'] = [
          'type' => 'serial',
          'unsigned' => TRUE,
          'not null' => TRUE,
        ];
        $fields += $source_ids_hash;

        $fields['level'] = [
          'type' => 'int',
          'unsigned' => TRUE,