Hi Joaquín,
That did the trick and helps explain the relationship across the composite
index. Many thanks!
The solution did raise a question concerning the lower/upper iterators being
used in this example. I expected to search getting iterators from
referencing the index, but these iterators are obtained from the container
level. Is this possible because there is only one index defined? If 2 or
more indexes were defined on this container would the iterators used here
work the same?
I apologize for asking what seems I should be able to get from docs - I've
read them twice and the concepts are starting to sink in but not yet
solidified. Multi_index is a very impressive creation!
Thanks again,
Jeff
-----Original Message-----
From: Boost-users [mailto:boost-users-bounces@lists.boost.org] On Behalf Of
Joaquin M Lopez Munoz
Sent: Monday, February 11, 2013 2:30 AM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users]How to search multi_index container using
composite key with date ranges
Jeff
Hi,
I am having syntax issues and wish to search a bmi container by the composite index defined below. I have read about boost::lambdas and understand how they work. I simply have gotten stuck in the syntax to perform the get on the index and how to create the tuple(s) containing the proper objects.
I want to search such that searchKey1=key1 and searchKey2=key2 and ValidFrom is <= '2013-03-01' and ValidTo >= '2013-02-08'. Can anyone help me please?
Hi Jeff, There's no way to retrieve this range with a single lookup operation, basically because the elements satisfying the four criteria are not sorted to appear adjacently in the idx_test index. The closest you can get is * lookup for elements with searchKey1=key1, searchKey2=key2, ValidFrom <= '2013-03-01' * filter out from the latter range those elements with ValidTo >= '2013-02-08' which would look roughly like this (not tested): TestCache tc; ... date valid_to=date(from_string("2013-02-08")); for( auto it= tc.lower_bound(boost:make_tuple("key1","key2")), it_end=tc.upper_bound( boost:make_tuple("key1","key2",from_string("2013-03-01"))), it!=it_end;++it){ if(it->ValidTo>=valid_to){...} } HTH, Joaquín M López Muñoz Telefónica Digital _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users