and generating the schema using hbm2ddl, Hibernate throws the following exception:
org.hibernate.MappingException: Unable to find column with physical name postalCode in table PostalCarrier
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.getLogicalColumnName(InFlightMetadataCollectorImpl.java:1001)
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.getLogicalColumnName(InFlightMetadataCollectorImpl.java:971)
at org.hibernate.cfg.IndexOrUniqueKeySecondPass.doSecondPass(IndexOrUniqueKeySecondPass.java:69)