KnpLabs / Gaufrette

    /**

     * {@inheritdoc}

     */

    public function keys()

    {

        $keys = array();

        $stmt = $this->connection->executeQuery(sprintf(

            'SELECT %s FROM %s',

            $this->getQuotedColumn('key'),

            $this->getQuotedTable()

        ));

        return $stmt->fetchAll(\PDO::FETCH_COLUMN);

    }

    /**

     * {@inheritdoc}

        return false;

    }

    private function getColumnValue($key, $column)

    {

        $value = $this->connection->fetchColumn(

            sprintf(

                'SELECT %s FROM %s WHERE %s = :key',

                $this->getQuotedColumn($column),

                $this->getQuotedTable(),

                $this->getQuotedColumn('key')

            ),

            array('key' => $key)

        );

        return $value;

    }

    /**

     * {@inheritdoc}