TopoElement — An array of 2 integers generally used to identify a TopoGeometry component.
An array of 2 integers used to represent the id (first element) and type (second element) of a topology primitive or the id (first element) and layer (second element) of a TopoGeometry. Sets of such pairs are used to define TopoGeometry objects (either simple or hierarchical).
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}
--Example of what happens when you try to case a 3 element array to topoelement -- NOTE: topoement has to be a 2 element array so fails dimension check SELECT ARRAY[1,2,3]::topology.topoelement; ERROR: value for domain topology.topoelement violates check constraint "dimensions"