计算pcpatch对象中pcpoint所有属性的最小值,返回新的pcpoint对象。
numeric ST_PatchMin(pcpatch pc);
参数名称
描述
pc
pcpatch对象。
SELECT ST_AsText(ST_PatchMin(pa)) FROM patches WHERE id = 7; --------------------------------- {"pcid":1,"pt":[-126.5,45.5,50,5]}