Description

An array of 2 integers used to represent one component of a simple or hierarchical TopoGeometry.

In the case of a simple TopoGeometry the first element of the array represents the identifier of a topological primitive and the second element represents its type (1:node, 2:edge, 3:face). In the case of a hierarchical TopoGeometry the first element of the array represents the identifier of a child TopoGeometry and the second element represents its layer identifier.

Examples

SELECT te[1] AS id, te[2] AS type FROM
( SELECT ARRAY[1,2]::topology.topoelement AS te ) f;

 id | type
----+------
  1 |    2
                 

SELECT ARRAY[1,2]::topology.topoelement;

  te
-------
 {1,2}
                 

This example shows what happens when casting a three-element array to topology.topoelement. The domain requires a two-element array, so the dimension check fails.

SELECT ARRAY[1,2,3]::topology.topoelement;

ERROR:  value for domain topology.topoelement violates check constraint "dimensions"

See Also

GetTopoGeomElements, TopoElementArray, TopoGeometry, TopoGeom_addElement, TopoGeom_remElement