Query for date range? JE

Hi,
I have seem some posts on the JE forum regarding quering for date range, but it is mostly using DPL.
Is there any way to do that using the JE API
Thanks,
Mohammad

Hi Mohammad,
A date range query can be performed as a key range query. There's nothing special about dates except that you'll want to use a key binding that gives a meaningful sort order. If you're representing your dates in milliseconds, then a LongBinding (in com.sleepycat.bind.tuple) will work well. In general, use tuple bindings for keys, because they provide a meaningful sort order.
To perform a range query, this FAQ has some hints:
http://www.oracle.com/technology/products/berkeley-db/faq/je_faq.html#28
On range searches in general, they can be done with Cursor.getSearchKeyRange or with the SortedSet.subSet and SortedMap.subMap methods, depending on whether you are using the base API or the Collections API. It is up to you which to use.
If you use Cursor.getSearchKeyRange you'll need to call getNext to iterate through the results. You'll have to watch for the end range yourself by checking the key returned by getNext. This API does not have a way to enforce range end values automatically.
If you use the Collections API you can call subMap or subSet and get an Iterator on the resulting collection. That iterator will enforce both the beginning and the end of the range automatically.
Does this answer your question?
--mark                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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