I need to use a commercial tool that creates tables in DB.
When I checked directly in Oracle the table created I could not see any contraint on it (via DBA console, No PK, no unique). However, if I insert duplicated row, the message is "MYSCHEMA.R36_...." contraint violated (I cannot remember exactly). I checked views SYS.ALL_CONSTRAINTS and SYS.DBA_CONTRAINTS for the reported name of the constraint, but nothing (I checked all contraints for MYSCHEMA so no mistyped contrain name).
What are other data dictionary views/tables to get constraints?