Parameters
| Name | Type | Mode |
|---|---|---|
| $1 | USER-DEFINED | IN |
| $2 | integer | IN |
args: a_polygon, n - Return the Nth interior linestring ring of the polygon geometry. Return NULL if the geometry is not a polygon or the given N is out of range.
| Name | Type | Mode |
|---|---|---|
| $1 | USER-DEFINED | IN |
| $2 | integer | IN |