This function obtains n consecutive pcpoint objects that start from a sequence number from a pcpatch object and returns a new pcpatch object that is composed of these pcpoint objects.
Syntax
pcpatch ST_range(pcpatch pc, integer start, integer n);
Parameters
Parameter | Description |
---|---|
pc | The pcpatch object. |
start | The sequence number of the start pcpoint object. The value starts from 1. |
n | The number of pcpoint objects after the pcpoint object (included) specified by the start parameter. |
Examples
update patches set pa=ST_range(pa, 2, 16);
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(1 rows)