<<Interface>> ValueExpression {Analysis}
Documentation
4.14.5 Base columns and generated columns
A column of a base table is either a base column or a generated column. A base column is one that is not a generated column.
A generated column is one whose values are determined by evaluation of a generation expression, a <value expression> whose declared type is by implication that of the column.
A generation expression can reference base columns of the base table to which it belongs but cannot otherwise access SQLdata. Thus, the value of the field corresponding to a generated column in row R is determined by the values of zero or more other fields of R.
Parent Package | Expressions | Abstract | No |
Export Control | PublicAccess | Link Class for | None |
Class Kind | NormalClass | Cardinality | n |
Space | | Concurrency | Sequential |
Persistence | No | | |
Operations
Associations