code: public function selectAll(string $sql, array $parameters = [])
      {
          $statement = $this->select($sql, $parameters);
  
          if ($statement === null) {
              return false;
          }
  
          $results = $this->readAll($statement);
  
          $statement->closeCursor();
          $statement = null;
  
          return $results;
      }
docs: @param string $sql
  @param array  $parameters
  
  @throws DatabaseException
  
  @return array|bool