Use MAXASGN option with DDL or MIGR command to assign the start value for a IDENTITY or
SEQUENCE column attribute based on the existing maximun assigned value. This option is useful
when you use DSCOPY to copy the information.

For example, the following DDl is generated with MAXASGN if MAXASSGNEDVAL is 20 for Table T1


  CREATE TABLE "JRH"."T1"                                       
 (                                                              
   "C1"                 INTEGER              GENERATED ALWAYS   
                       AS IDENTITY                              
-- START=1. MAXASSIGNEDVAL=20.                                  
                       ( START WITH   21 ,                      
                         INCREMENT BY 1. ,                      
                         NO CACHE                               
                        ,NO CYCLE                               
                        ,MAXVALUE     2147483647.               
                        ,MINVALUE     -2147483648.              
                       )                                        
  ,"C2"                 INTEGER              NOT NULL           
  )