ColumnDefault (Hibernate Javadocs)

```
@Target({FIELD,METHOD})
@Retention(RUNTIME)
public @interface ColumnDefault
```
Specifies that a column has a default value specified in DDL.
@ColumnDefault may be used in combination with:
- @DynamicInsert, to let the database fill in the value of a null entity attribute, or
- @Generated, to populate an entity attribute with the defaulted value of a database column.
If @Generated is not used, a default value can cause state held in memory to lose synchronization with the database.
See Also:

GeneratedColumn, DialectOverride.ColumnDefault

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  String value
  The default value to use in generated DDL.

- Element Detail
  - value
```
String value
```
    The default value to use in generated DDL.
    
    Returns:
    
    a SQL expression that evaluates to the default column value