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lib: make notmuch_query_count_messages explicitely exact

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The default is actually exact if no checkatleast parameter is
specified. This change makes that explicit, mainly for documentation,
but also to be safe in the unlikely event of a change of default.

[ commit message rewritten by db based on id:87lho0nlkk.fsf@nikula.org
]
This commit is contained in:
Jani Nikula 2014-10-14 19:32:54 +03:00 committed by David Bremner
parent 76f8498df6
commit 6d44e5ac47
3 changed files with 9 additions and 9 deletions
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5
devel/TODO
View file

@ -188,11 +188,6 @@ into the shared-library interface.
Audit all libnotmuch entry points to ensure that all Xapian calls are
wrapped in a try/catch block.
Fix the "count" functionality to be exact as Olly explained in IRC:
ojwb> cworth: if you set the check_at_least parameter to the
database size, get_matches_estimated() will be exact
Fix the threading of a message that has a References: header but no
In-Reply-To: header (see id:"87lixxnxpb.fsf@yoom.home.cworth.org").

6
lib/notmuch.h
View file

@ -909,10 +909,10 @@ void
notmuch_threads_destroy (notmuch_threads_t *threads);
/**
* Return an estimate of the number of messages matching a search.
* Return the number of messages matching a search.
*
* This function performs a search and returns Xapian's best
* guess as to number of matching messages.
* This function performs a search and returns the number of matching
* messages.
*
* If a Xapian exception occurs, this function may return 0 (after
* printing a message).

7
lib/query.cc
View file

@ -587,7 +587,12 @@ notmuch_query_count_messages (notmuch_query_t *query)
enquire.set_query (final_query);
mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
/*
* Set the checkatleast parameter to the number of documents
* in the database to make get_matches_estimated() exact.
*/
mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount (),
notmuch->xapian_db->get_doccount ());
count = mset.get_matches_estimated();