Backward Compatibility: Changes to Default Behavior
The default behavior of SAP Sybase IQ has changed in some
areas.
Constraint Violation Checks
The order in which the database server evaluates check constraints and unique constraints has changed in SAP Sybase IQ 16.0. This behavior change occurs only for LOAD or INSERT statements containing the clause IGNORE CONSTRAINT CHECK <x>, UNIQUE <y>.
Database Options: Changed Defaults
If you are upgrading from an earlier release of SAP Sybase IQ, note that default values of some database options changed in release 16.0.