Merge pull request #21957 from vespa-engine/toregge/remove-outdated-andnot-optimization

Remove outdated andnot optimization.

3 files changed, 2 insertions, 94 deletions

diff --git a/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp b/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
index ac408cfb2de..f1243665636 100644
--- a/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
+++ b/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
@@ -18,7 +18,6 @@ LOG_SETUP(".proton.matching.match_thread");
 
 namespace proton::matching {
 
-using search::queryeval::OptimizedAndNotForBlackListing;
 using search::queryeval::SearchIterator;
 using search::fef::MatchData;
 using search::fef::RankProgram;
@@ -48,17 +47,6 @@ struct SimpleStrategy {
     }
 };
 
-// seek_next maps to OptimizedAndNotForBlackListing::seekFast
-struct FastBlackListingStrategy {
-    static bool can_use(bool do_rank, bool do_limit, SearchIterator &search) {
-        return (!do_rank && !do_limit &&
-                (dynamic_cast<OptimizedAndNotForBlackListing *>(&search) != nullptr));
-    }
-    static uint32_t seek_next(SearchIterator &search, uint32_t docid) {
-        return static_cast<OptimizedAndNotForBlackListing &>(search).seekFast(docid);
-    }
-};
-
 LazyValue get_score_feature(const RankProgram &rankProgram) {
     FeatureResolver resolver(rankProgram.get_seeds());
     assert(resolver.num_features() == 1u);
@@ -222,11 +210,7 @@ template <bool do_rank, bool do_limit, bool do_share, bool use_rank_drop_limit>
 void
 MatchThread::match_loop_helper_rank_limit_share_drop(MatchTools &tools, HitCollector &hits)
 {
-    if (FastBlackListingStrategy::can_use(do_rank, do_limit, tools.search())) {
-        match_loop<FastBlackListingStrategy, do_rank, do_limit, do_share, use_rank_drop_limit>(tools, hits);
-    } else {
-        match_loop<SimpleStrategy, do_rank, do_limit, do_share, use_rank_drop_limit>(tools, hits);
-    }
+    match_loop<SimpleStrategy, do_rank, do_limit, do_share, use_rank_drop_limit>(tools, hits);
 }
 
 template <bool do_rank, bool do_limit, bool do_share>
diff --git a/searchlib/src/vespa/searchlib/queryeval/andnotsearch.cpp b/searchlib/src/vespa/searchlib/queryeval/andnotsearch.cpp
index 2307b778381..c7b81bc9da7 100644
--- a/searchlib/src/vespa/searchlib/queryeval/andnotsearch.cpp
+++ b/searchlib/src/vespa/searchlib/queryeval/andnotsearch.cpp
@@ -105,41 +105,11 @@ AndNotSearchStrict::internalSeek(uint32_t docid)
 
 }  // namespace
 
-OptimizedAndNotForBlackListing::OptimizedAndNotForBlackListing(MultiSearch::Children children) :
-    AndNotSearchStrictBase(std::move(children))
-{   
-}
-    
-void OptimizedAndNotForBlackListing::initRange(uint32_t beginid, uint32_t endid)
-{
-    AndNotSearch::initRange(beginid, endid);
-    setDocId(internalSeek<false>(beginid));
-}
-
-bool OptimizedAndNotForBlackListing::isBlackListIterator(const SearchIterator * iterator)
-{
-    return dynamic_cast<const BlackListIterator *>(iterator) != 0;
-}
-
-void OptimizedAndNotForBlackListing::doSeek(uint32_t docid)
-{
-    setDocId(internalSeek<true>(docid));
-}   
-
-void OptimizedAndNotForBlackListing::doUnpack(uint32_t docid)
-{
-    positive()->doUnpack(docid);
-} 
-
 std::unique_ptr<SearchIterator>
 AndNotSearch::create(ChildrenIterators children_in, bool strict) {
     MultiSearch::Children children = std::move(children_in);
     if (strict) {
-        if ((children.size() == 2) && OptimizedAndNotForBlackListing::isBlackListIterator(children[1].get())) {
-            return std::make_unique<OptimizedAndNotForBlackListing>(std::move(children));
-        } else {
-            return std::make_unique<AndNotSearchStrict>(std::move(children));
-        }
+        return std::make_unique<AndNotSearchStrict>(std::move(children));
     } else {
         return SearchIterator::UP(new AndNotSearch(std::move(children)));
     }
diff --git a/searchlib/src/vespa/searchlib/queryeval/andnotsearch.h b/searchlib/src/vespa/searchlib/queryeval/andnotsearch.h
index d65a3d9c72e..e474ab7c90c 100644
--- a/searchlib/src/vespa/searchlib/queryeval/andnotsearch.h
+++ b/searchlib/src/vespa/searchlib/queryeval/andnotsearch.h
@@ -48,50 +48,4 @@ private:
     UP andWith(UP filter, uint32_t estimate) override;
 };
 
-/**
- * This is a specialized andnot iterator you get when you have no andnot's in you query and only get the blacklist blueprint.
- * This one is now constructed at getSearch() phase. However this should be better handled in the AndNotBlueprint.
- */
-class OptimizedAndNotForBlackListing : public AndNotSearchStrictBase
-{
-private:
-    // This is the actual iterator that should be produced by the documentmetastore in searchcore, but that
-    // will probably be changed later on. An ordinary bitvector could be even better as that would open up for more optimizations.
-    //typedef FilterAttributeIteratorT<SingleValueSmallNumericAttribute::SingleSearchContext> BlackListIterator;
-    typedef AttributeIteratorT<SingleValueSmallNumericAttribute::SingleSearchContext> BlackListIterator;
-public:
-    OptimizedAndNotForBlackListing(MultiSearch::Children children);
-    static bool isBlackListIterator(const SearchIterator * iterator);
-
-    uint32_t seekFast(uint32_t docid) {
-        return internalSeek<true>(docid);
-    }
-    void initRange(uint32_t beginid, uint32_t endid) override;
-private:
-    SearchIterator * positive() { return getChildren()[0].get(); }
-    BlackListIterator * blackList() { return static_cast<BlackListIterator *>(getChildren()[1].get()); }
-    template<bool doSeekOnly>
-    uint32_t internalSeek(uint32_t docid) {
-        uint32_t curr(docid);
-        while (true) {
-            if (doSeekOnly) {
-                positive()->doSeek(curr);
-            } else {
-                positive()->seek(curr);
-            }
-            if ( ! positive()->isAtEnd() ) {
-                curr = positive()->getDocId();
-                if (! blackList()->seekFast(curr)) {
-                    return curr;
-                }
-                curr++;
-            } else {
-                return search::endDocId;
-            }
-        }
-    }
-    void doSeek(uint32_t docid) override;
-    void doUnpack(uint32_t docid) override;
-};
-
 }