# File lib/dm-constraints/adapters/dm-do-adapter.rb, line 78
        def destroy_relationship_constraint(relationship)
          return false unless valid_relationship_for_constraint?(relationship)

          source_model = relationship.source_model
          source_table = source_model.storage_name(name)

          constraint_name = constraint_name(source_table, relationship.name)
          return false unless constraint_exists?(source_table, constraint_name)

          execute(destroy_constraints_statement(source_table, constraint_name))
        end