我在Oracle db中创建了以下sql并且它可以工作。现在我需要为每个阶段添加保持和取消保留时间，以便将状态更改为保持并以某种方式计算每个保持 - 未保留时间并从死线中删除时间 示例problemid：111阶段：分类复杂性：次要截止日期：2016年1月17日（2天）12:00让我们说我今天保持状态并且在8:00将其保留为tommorow结果必须是有问题的：111阶段：分类复杂性：次要截止日期：18/1/2016（2天）7:00。
所以我想计算暂停的时间并动态更改截止日期， 任何的想法？
select
ProblemID,
CASE --this calculate the next phase
WHEN phases is null and INSERTIONDATE is null THEN 'Acknowledge'
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null THEN 'Classification'
WHEN phases = 'Classification' and INSERTIONDATE is not null THEN 'Feasibility'
END
PHASES,
CASE --this add the deadline for every phase
WHEN phases is null and INSERTIONDATE is null and Priority = 1 THEN trunc(CreationDate)+2
WHEN phases is null and INSERTIONDATE is null and Priority = 1 THEN trunc(CreationDate)+2
WHEN phases is null and INSERTIONDATE is null and Priority = 1 THEN trunc(CreationDate)+2
WHEN phases is null and INSERTIONDATE is null and Priority = 2 THEN trunc(CreationDate)+2
WHEN phases is null and INSERTIONDATE is null and Priority = 2 THEN trunc(CreationDate)+2
WHEN phases is null and INSERTIONDATE is null and Priority = 2 THEN trunc(CreationDate)+2
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'minor' THEN trunc(InsertionDate)+5
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'medium' THEN trunc(InsertionDate)+5
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'major' THEN trunc(InsertionDate)+10
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'minor' THEN
CASE
WHEN (trunc(InsertionDate)+5-TRUNC(sysdate,'IW')+1) = 7 then trunc(InsertionDate)+6
WHEN (trunc(InsertionDate)+5-trunc(sysdate,'IW')+1) = 6 then trunc(InsertionDate)+7
END
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'medium' THEN trunc(InsertionDate)+5
WHEN phases = 'Acknowledgement' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'major' THEN trunc(InsertionDate)+10
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'minor' THEN trunc(InsertionDate)+5
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'medium' THEN trunc(InsertionDate)+10
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'major' THEN trunc(InsertionDate)+20
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'minor' THEN trunc(InsertionDate)+10
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'medium' THEN trunc(InsertionDate)+20
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'major' THEN trunc(InsertionDate)+30
END
DEADLINE,
CASE --this calculate state
WHEN phases is null and INSERTIONDATE is null and Priority = 1 and Complexity = 'minor' THEN
CASE
WHEN (trunc(CreationDate)+3-TRUNC(sysdate,'IW')+1) = 7 THEN 'OK'
WHEN (trunc(CreationDate)+3-trunc(sysdate,'IW')+1) = 6 THEN 'OK'
ELSE 'DELAYED'
END
WHEN phases is null and INSERTIONDATE is null and Priority = 1 and trunc(CreationDate)+3 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases is null and INSERTIONDATE is null and Priority = 1 and trunc(CreationDate)+3 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases is null and INSERTIONDATE is null and Priority = 2 and trunc(CreationDate)+3 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases is null and INSERTIONDATE is null and Priority = 2 and trunc(CreationDate)+3 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases is null and INSERTIONDATE is null and Priority = 2 and trunc(CreationDate)+3 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'minor' and trunc(CreationDate)+6 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'medium' and trunc(CreationDate)+6 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'major' and trunc(CreationDate)+11 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'minor' THEN
CASE
WHEN (trunc(CreationDate)+5-TRUNC(sysdate,'IW')+1) = 7 THEN 'OK'
WHEN (trunc(CreationDate)+5-trunc(sysdate,'IW')+1) = 6 THEN 'OK'
ELSE 'DELAYED'
END
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'medium' and trunc(CreationDate)+6 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Acknowledge' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'major' and trunc(CreationDate)+11 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'minor' and trunc(CreationDate)+6 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'medium' and trunc(CreationDate)+11 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 1 and Complexity = 'major' and trunc(CreationDate)+21 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'minor' and trunc(CreationDate)+11 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'medium' and trunc(CreationDate)+21 <= trunc(SYSDATE) THEN 'DELAYED'
WHEN phases = 'Classification' and INSERTIONDATE is not null and Priority = 2 and Complexity = 'major' and trunc(CreationDate)+31 <= trunc(SYSDATE) THEN 'DELAYED'
ELSE 'OK'
END
STATE
from problem_PHASES