25 #ifndef OM_HGUARD_ANDNOTPOSTLIST_H 26 #define OM_HGUARD_ANDNOTPOSTLIST_H Abstract base class for postlists.
double get_maxweight() const
Return an upper bound on what get_weight() can return.
Xapian::termcount get_wdf() const
get_wdf() for ANDNOT postlists returns the wdf of the left hand side.
AndNotPostList(PostList *left, PostList *right, MultiMatch *matcher_, Xapian::doccount dbsize_)
Xapian::doccount get_termfreq_est() const
Get an estimate of the number of documents indexed by this term.
Xapian::doccount get_termfreq_min() const
Get a lower bound on the number of documents indexed by this term.
Base class for postlists which are generated by merging two sub-postlists.
double recalc_maxweight()
Recalculate the upper bound on what get_weight() can return.
virtual Xapian::termcount get_unique_terms() const
Return the number of unique terms in the current document.
unsigned XAPIAN_TERMCOUNT_BASE_TYPE termcount
A counts of terms.
double get_weight() const
Return the weight contribution for the current position.
virtual Xapian::termcount get_doclength() const
Return the document length of the document the current term comes from.
bool at_end() const
Return true if the current position is past the last entry in this list.
virtual base class for branched types of postlist
Class to hold statistics for a given collection.
Internal * next()
Advance the current position to the next document in the postlist.
PostList * advance_to_next_match(double w_min, PostList *ret)
TermFreqs get_termfreq_est_using_stats(const Xapian::Weight::Internal &stats) const
Get an estimate for the termfreq and reltermfreq, given the stats.
The frequencies for a term.
unsigned XAPIAN_DOCID_BASE_TYPE doccount
A count of documents.
PostList * sync_and_skip_to(Xapian::docid id, double w_min, Xapian::docid lh, Xapian::docid rh)
Xapian::doccount get_termfreq_max() const
Get an upper bound on the number of documents indexed by this term.
PostList * skip_to(Xapian::docid did, double w_min)
Skip forward to the specified docid.
std::string get_description() const
Return a string description of this object.
Xapian::doccount dbsize
Number of documents in the database this postlist is across.
A postlist generated by taking one postlist (the left-hand postlist), and removing any documents whic...
Xapian::docid get_docid() const
Return the current docid.
unsigned XAPIAN_DOCID_BASE_TYPE docid
A unique identifier for a document.
Xapian::termcount count_matching_subqs() const
Count the number of leaf subqueries which match at the current position.