Fix bugs in doUnpack() in memory posting iterator.

3 files changed, 16 insertions, 3 deletions

diff --git a/searchlib/src/tests/memoryindex/field_index/field_index_test.cpp b/searchlib/src/tests/memoryindex/field_index/field_index_test.cpp
index de3b87194f8..ac5ef45e330 100644
--- a/searchlib/src/tests/memoryindex/field_index/field_index_test.cpp
+++ b/searchlib/src/tests/memoryindex/field_index/field_index_test.cpp
@@ -14,6 +14,7 @@
 #include <vespa/searchlib/memoryindex/field_inverter.h>
 #include <vespa/searchlib/memoryindex/ordered_field_index_inserter.h>
 #include <vespa/searchlib/memoryindex/posting_iterator.h>
+#include <vespa/searchlib/queryeval/iterators.h>
 #include <vespa/searchlib/test/index/mock_field_length_inspector.h>
 #include <vespa/searchlib/test/memoryindex/wrap_inserter.h>
 #include <vespa/vespalib/btree/btreenodeallocator.hpp>
@@ -31,6 +32,7 @@ using namespace fef;
 using namespace index;
 
 using document::Document;
+using queryeval::RankedSearchIteratorBase;
 using queryeval::SearchIterator;
 using search::index::schema::CollectionType;
 using search::index::schema::DataType;
@@ -641,6 +643,9 @@ struct FieldIndexInterleavedFeaturesTest : public FieldIndexTest<FieldIndex<true
         EXPECT_EQ(exp_field_positions, toString(match_data));
         EXPECT_EQ(exp_num_occs, match_data.term.getNumOccs());
         EXPECT_EQ(exp_field_length, match_data.term.getFieldLength());
+        EXPECT_EQ(10, match_data.term.getDocId());
+        auto& ranked_itr = dynamic_cast<RankedSearchIteratorBase&>(*itr);
+        EXPECT_TRUE(ranked_itr.getUnpacked());
         EXPECT_TRUE(!itr->seek(11));
         EXPECT_TRUE(itr->isAtEnd());
     }
@@ -667,6 +672,13 @@ TEST_F(FieldIndexInterleavedFeaturesTest, both_normal_and_interleaved_features_a
     expect_features_unpacked("{5:0,1}", 2, 5);
 }
 
+TEST_F(FieldIndexInterleavedFeaturesTest, no_features_are_unpacked)
+{
+    match_data.term.setNeedNormalFeatures(false);
+    match_data.term.setNeedInterleavedFeatures(false);
+    expect_features_unpacked("{1000000:}", 0, 0);
+}
+
 Schema
 make_multi_field_schema()
 {
diff --git a/searchlib/src/vespa/searchlib/memoryindex/posting_iterator.cpp b/searchlib/src/vespa/searchlib/memoryindex/posting_iterator.cpp
index ecaa1514c6b..735fec2bb5f 100644
--- a/searchlib/src/vespa/searchlib/memoryindex/posting_iterator.cpp
+++ b/searchlib/src/vespa/searchlib/memoryindex/posting_iterator.cpp
@@ -124,13 +124,15 @@ PostingIterator<interleaved_features, unpack_normal_features, unpack_interleaved
         datastore::EntryRef featureRef(_itr.getData().get_features());
         _feature_store.setupForUnpackFeatures(featureRef, _feature_decoder);
         _feature_decoder.unpackFeatures(_matchData, docId);
-        setUnpacked();
+    } else {
+        _matchData[0]->reset(docId);
     }
     if (interleaved_features && unpack_interleaved_features) {
         auto* tfmd = _matchData[0];
         tfmd->setNumOccs(_itr.getData().get_num_occs());
         tfmd->setFieldLength(_itr.getData().get_field_length());
     }
+    setUnpacked();
 }
 
 template <bool interleaved_features>
diff --git a/searchlib/src/vespa/searchlib/queryeval/iterators.h b/searchlib/src/vespa/searchlib/queryeval/iterators.h
index 43d046a78b7..0e44a6f6ff6 100644
--- a/searchlib/src/vespa/searchlib/queryeval/iterators.h
+++ b/searchlib/src/vespa/searchlib/queryeval/iterators.h
@@ -16,14 +16,13 @@ public:
 private:
     uint32_t _needUnpack;
 protected:
-    bool getUnpacked()       const { return _needUnpack == 0; }
     void setUnpacked()             { _needUnpack = 0; }
     void clearUnpacked()           { _needUnpack = 1; }
     uint32_t getNeedUnpack() const { return _needUnpack; }
     void incNeedUnpack()           { ++_needUnpack; }
-
 public:
     RankedSearchIteratorBase(const fef::TermFieldMatchDataArray &matchData);
+    bool getUnpacked()       const { return _needUnpack == 0; }
 };
 
 }