rkrx / php-mysql-query-builder

	 * @param array $fields

	 * @return Builder\RunnableSelect

	 */

	public function select(array $fields = null) {

		$select = array_key_exists('select-factory', $this->options)

			? call_user_func($this->options['select-factory'], $this, $this->options['select-options'])

			: new Builder\RunnableSelect($this, $this->options['select-options']);

		if($fields !== null) {

			$select->fields($fields);

		}

		return $select;

	}

	/**

	 * @param array $fields

	 * @param array $fields

	 * @return Builder\RunnableInsert

	 */

	public function insert(array $fields = null) {

		$insert = array_key_exists('insert-factory', $this->options)

			? call_user_func($this->options['insert-factory'], $this, $this->options['insert-options'])

			: new Builder\RunnableInsert($this, $this->options['insert-options']);

		if($fields !== null) {

			$insert->addAll($fields);

		}

		return $insert;

	}

	/**

	 * @param array $fields

	 * @param array $fields

	 * @return Builder\RunnableUpdate

	 */

	public function update(array $fields = null) {

		$update = array_key_exists('update-factory', $this->options)

			? call_user_func($this->options['update-factory'], $this, $this->options['update-options'])

			: new Builder\RunnableUpdate($this, $this->options['update-options']);

		if($fields !== null) {

			$update->setAll($fields);

		}

		return $update;

	}

	/**

	 * @return Builder\RunnableDelete