pgRouting Data Types - pgRouting Manual (2.6)

pgRouting Data Types
The following are commonly used data types for some of the pgRouting functions.
pgr_costResult[] - A set of records to describe a path result with cost attribute.
pgr_costResult3[] - A set of records to describe a path result with cost attribute.
pgr_geomResult - A set of records to describe a path result with geometry attribute.