Automated database managers identify each of a plurality of different constraints that are each individually active for a data operation on a data value of a table data field of a relational database for a data operation. A database manager processor selects an untested one of the plurality of constraints as a selected constraint, and tests a field data value of the table data field for a defined condition of the selected constraint. In response to the test of the field data value meeting the defined condition of the selected constraint, the processor performs the data operation on the data value of the table data field, without testing any other untested ones of the plurality of different constraints.