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). Examples
DescriptionUsage:  Arguments: 
  | 
        
            APICommand LineConstraintsControllersDatabase MappingDomain ClassesPlug-insServlet APITag LibrariesTags - GSPVersions |