[英]Oracle query using mod operator
I have a spring batch which tries to upload pending documents to a server every 5 mins from the below table. 我有一个春季批处理,尝试从下表中每5分钟将待处理的文档上载到服务器。 Currently, after 5 unsuccessful attempts to upload the file, the batch will mark the record as failed and send a notification email.
当前,在5次未成功上传文件的尝试之后,该批处理会将记录标记为失败并发送通知电子邮件。 I'm trying to enhance this batch to try upload 2 more times with 6 hours gap after the 5 attempts.
我正在尝试增强此批处理,以尝试在5次尝试之后有6小时的间隔再上传2次。 ie, till the FAIL_CTR reaches 5, record will be tried to upload every 5 mins.
也就是说,直到FAIL_CTR达到5时,才会尝试每5分钟上传一次记录。 Once the FAIL_CTR reaches 5, record will be tried to upload every 6 hours.
FAIL_CTR达到5后,将尝试每6小时上传一次记录。
Here is what I have tried so far for the query which selects eligible records for the batch to upload. 到目前为止,这是我为查询选择的要上传的批处理记录的内容。 The issue is that, for a record which already failed 5 times, on the 6th hour, the batch will try to upload in every 5 mins.
问题是,对于已失败5次的记录,在第6小时,批次将尝试每5分钟上传一次。 I just need it to be done once after 6 hours after the 5th try and once after 6 hours after the 6th try.
我只需要在第5次尝试后6小时后和第6次尝试后6小时后再执行一次即可。 How can I achieve it ?
我该如何实现?
select * from SUPPORT_DOCS DOCS
where (DOCS.FAIL_CTR < 5 OR (DOCS.FAIL_CTR < 7 AND floor(mod(24*(SYSDATE-DOCS.LAST_ATTEMPTED_DATE),6))=0))
and DOCS.STATUS='F';
I think the logic would be 我认为逻辑是
Select * from SUPPORT_DOCS DOCS
where (
(DOCS.FAIL_CTR < 5 OR
(DOCS.FAIL_CTR = 5 AND SYSDATE-DOCS.LAST_ATTEMPTED_DATE > 0.25) OR
(DOCS.FAIL_CTR = 6 AND SYSDATE-DOCS.LAST_ATTEMPTED_DATE > 0.5)
)
and DOCS.STATUS='F';
date1 - date2 in oracle produces a result in days, so you want quarter of a day delay before a retry, then half a day. oracle中的date1-date2以天为单位生成结果,因此您要在重试之前延迟四分之一天,然后再延迟半天。 I assume that a retry reliably updates the last attempted date and increments the fail counter..
我假设重试会可靠地更新上一次尝试的日期并增加失败计数器。
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