The unique constraints page lists unique constraints and primary key constraints from the database. Additionally, it is possible to create virtual unique constraints that do not represent a real object from the database but will act as such in Asmidio RDG.
If unique constraints are missing, it may be necessary to refresh the database metadata (shortcut
Note: Asmidio RDG will respect unique constraints at execution time, which means it will not try to insert duplicate rows according to those constraints. Since Asmidio RDG uses a memory-efficient, probabilistic data structure to do so, it is unlikely but possible that some insertions statements fail because of a unique constraint violation. In this case the the error will appears in the execution report but should not cause trouble since a number of failed statements is tolerated.