def set_column_comment(table_name, column_name, comment_text)
      execute comment_sql(CommentDefinition.new(table_name, column_name, comment_text))
    end
def set_column_comment(table_name, column_name, comment_text)
      execute comment_sql(CommentDefinition.new(table_name, column_name, comment_text))
    end
Set a comment on a column