我可以使用mapreduce在CouchDB中查询视图吗？ [英] Can I query a view in CouchDB using mapreduce?

问题描述

我有这个问题，我认为我需要做多次（两次）mapreduce才能获得预期的结果。在CouchDB中可以吗？如果不是，则
还有其他数据库引擎可能支持此功能吗？

I have this problem that I think would require me to do multiple(two) mapreduces to get the expected result. Is this possible in CouchDB? If not, A are there other database engines that might support this?

推荐答案

否 >。您可以尝试 Couldant托管，该托管支持map-reduce链接，但是这将您锁定在该平台中，据我所知。

No. You could try Couldant hosting, which support map-reduce chaining, but that would lock you into that platform, as far as I can tell.

如果可以接受延迟，则可以使用异步过程将视图数据反馈回CouchDB作为第二个视图的输入。

If a delay is acceptable, you may use an asynchronous process to feed the view data back into CouchDB as input for the second view.

这篇关于我可以使用mapreduce在CouchDB中查询视图吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！