如何计算包含一组mysql几何的边界框？

Question

我有一个包含一组形状的mysql表。该表的定义如下：

+------------+--------------+------+-----+---------+-------+
| Field      | Type         | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+-------+
| shapeid    | int(11)      | NO   | PRI | NULL    |       |
| AREA       | double       | YES  |     | NULL    |       |
| PERIMETER  | double       | YES  |     | NULL    |       |
| KENPROV_   | double       | YES  |     | NULL    |       |
| KENPROV_ID | double       | YES  |     | NULL    |       |
| PROV_NAME  | varchar(255) | YES  |     | NULL    |       |
| ogc_geom   | geometry     | YES  |     | NULL    |       |
+------------+--------------+------+-----+---------+-------+

该表包含24个形状（记录）。每个形状在“ogc_geom”中都有定义形状的多边形。

shapeid = 0的“ogc_geom”示例为：

POLYGON((33.99319839477539 -3.185349941253662,38.084800720214844 -3.185349941253662,38.084800720214844 5.022779941558838,33.99319839477539 5.022779941558838,33.99319839477539 -3.185349941253662))

如何计算包围所有形状的边界框？