db2 removal of Generate always Expression on Timestamp data type I have a column UPDATE_TIME with an expression 

 TIMESTAMP NOT NULL GENERATED ALWAYS FOR EACH ROW ON UPDATE AS ROW CHANGE TIMESTAMP


How to remove the Generated always for timestamps?

I tried 

  db2 "alter table xxxx alter column UPDATE_TIME drop expression"
This is not valid syntax.  You need to use,

 alter table xxxx alter column update_time drop generated


See the documentation on alter table for more details.