declare
cnt number;
begin
select count(*) into cnt from user_tab_columns where TABLE_NAME ='TWORKFLOWLIST' and COLUMN_NAME='C_STATUS' and data_length < 2;
if cnt<=0 then
execute immediate 'alter table TWORKFLOWLIST modify (C_STATUS varchar2(2))';
execute immediate 'comment on column TWORKFLOWLIST.C_STATUS
is ''工作報告狀態(new),新增字典"工作報告狀態" 0 草稿,1,已提交,2已通過3已駁回,4已彙總;5未發佈(用於客服日報),6已發佈(用於客服日報);20計劃草稿,21計劃提交,10總結草稿,11總結提交''';
end if;
end;
/