Oracle自定义函数


判断任务过期时间:

  create or replace function GetUrgentState(m_TaskID   varchar2,

  m_SendTime date,

  m_flag     varchar2)

  return varchar2 IS

  myDate     date;

  ExpireTime date;

  strsql     varchar2(200);

  begin

  myDate := m_SendTime;

  strsql := 'select max(EXPIRETIME) from t_wf_supervise where TASKID =''' ||

  m_TaskID || '''';

  execute immediate strsql

  into ExpireTime;

  --没有到期时间 就是正常状态

  if ExpireTime is null then

  if m_flag = 'String' then

  return '正常';

  end if;

  if m_flag = 'Img' then

  return 'cb_execute.gif';

  end if;

  end if;

  --未发送任务,就是判断当前时间

  if m_SendTime is null then

  myDate := sysdate;

  end if;

  if ExpireTime < myDate then

  if m_flag = 'String' then

  return '超期';

  end if;

  if m_flag = 'Img' then

  return 'cb_limit.gif';

  end if;

  end if;

  --小于3天的任务预警

  if ExpireTime - myDate < 3 then

  if m_flag = 'String' then

  return '预警';

  end if;

  if m_flag = 'Img' then

  return 'cb_warning.gif';

  end if;

  else

  if m_flag = 'String' then

  return '正常';

  end if;

  if m_flag = 'Img' then

  return 'cb_execute.gif';

  end if;

  end if;

  end;

  查询其它表数据:

  create or replace function GetPreNode(m_PreTaskID varchar2) return varchar2 IS

  nodename varchar2(50);

  strsql   varchar2(200);

  begin

  if m_PreTaskID is null then

  return '';

  end if;

  strsql := 'select max(nodename) from t_Wf_Tasklist where TaskID =''' ||

  m_PreTaskID|| '''';

  execute immediate strsql

  into nodename;

  return nodename;

  end;

  格式化标题输出:

  create or replace function FormatTitle(m_title    varchar2,

  m_length   number,

  m_FillChar varchar2) return varchar2 IS

  begin

  if lengthb(m_title) > m_length*2 then

  return substr(m_title, 0,m_length) || m_FillChar;

  else

  return m_title;

  end if;

  end;


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