class Book {
   static mapping = {
      comment "your comment here"
   }
}comment
Purpose
Sets the comment to use when generating the table’s creation SQL (DDL).
Examples
Description
Usage: comment(string)
Arguments:
- 
comment- The comment
| 
                (Quick Reference)
                
                 commentPurposeSets the comment to use when generating the table’s creation SQL (DDL). ExamplesDescriptionUsage:  Arguments: 
 | Command LineConstraintsControllersDatabase MappingDomain ClassesPlug-insServicesServlet API |