Support direct posting store API for single string attribute.

1 files changed, 85 insertions, 42 deletions

diff --git a/searchlib/src/tests/attribute/direct_multi_term_blueprint/direct_multi_term_blueprint_test.cpp b/searchlib/src/tests/attribute/direct_multi_term_blueprint/direct_multi_term_blueprint_test.cpp
index f2341d0968e..fdf3485b0d8 100644
--- a/searchlib/src/tests/attribute/direct_multi_term_blueprint/direct_multi_term_blueprint_test.cpp
+++ b/searchlib/src/tests/attribute/direct_multi_term_blueprint/direct_multi_term_blueprint_test.cpp
@@ -4,6 +4,7 @@
 #include <vespa/searchlib/attribute/i_docid_posting_store.h>
 #include <vespa/searchlib/attribute/i_docid_with_weight_posting_store.h>
 #include <vespa/searchlib/attribute/integerbase.h>
+#include <vespa/searchlib/attribute/stringbase.h>
 #include <vespa/searchlib/fef/termfieldmatchdata.h>
 #include <vespa/searchlib/queryeval/orsearch.h>
 #include <vespa/searchlib/queryeval/searchiterator.h>
@@ -19,13 +20,22 @@ using namespace search::queryeval;
 using namespace search;
 using testing::StartsWith;
 
-struct IntegerKey : public IDirectPostingStore::LookupKey {
+using LookupKey = IDirectPostingStore::LookupKey;
+
+struct IntegerKey : public LookupKey {
     int64_t _value;
     IntegerKey(int64_t value_in) : _value(value_in) {}
     vespalib::stringref asString() const override { abort(); }
     bool asInteger(int64_t& value) const override { value = _value; return true; }
 };
 
+struct StringKey : public IDirectPostingStore::LookupKey {
+    vespalib::string _value;
+    StringKey(int64_t value_in) : _value(std::to_string(value_in)) {}
+    vespalib::stringref asString() const override { return _value; }
+    bool asInteger(int64_t&) const override { abort(); }
+};
+
 const vespalib::string field_name = "test";
 constexpr uint32_t field_id = 3;
 uint32_t doc_id_limit = 500;
@@ -50,73 +60,86 @@ concat(const Docids& a, const Docids& b)
     return res;
 }
 
+template <typename AttributeType, typename DataType>
+void
+populate_attribute(AttributeType& attr, const std::vector<DataType>& values)
+{
+    // Values 0 and 1 have btree (short) posting lists.
+    attr.update(10, values[0]);
+    attr.update(30, values[1]);
+    attr.update(31, values[1]);
+
+    // Values 2 and 3 have bitvector posting lists.
+    // We need at least 128 documents to get bitvector posting list (see PostingStoreBase2::resizeBitVectors())
+    for (auto docid : range(100, 128)) {
+        attr.update(docid, values[2]);
+    }
+    for (auto docid : range(300, 128)) {
+        attr.update(docid, values[3]);
+    }
+    attr.commit(true);
+}
+
 std::shared_ptr<AttributeVector>
-make_attribute(bool field_is_filter, CollectionType col_type)
+make_attribute(CollectionType col_type, BasicType type, bool field_is_filter)
 {
-    Config cfg(BasicType::INT64, col_type);
+    Config cfg(type, col_type);
     cfg.setFastSearch(true);
     if (field_is_filter) {
         cfg.setIsFilter(field_is_filter);
     }
     uint32_t num_docs = doc_id_limit - 1;
     auto attr = test::AttributeBuilder(field_name, cfg).docs(num_docs).get();
-    IntegerAttribute& real = dynamic_cast<IntegerAttribute&>(*attr);
-
-    // Values 1 and 3 have btree (short) posting lists with weights.
-    real.update(10, 1);
-    real.update(30, 3);
-    real.update(31, 3);
-
-    // Values 100 and 300 have bitvector posting lists.
-    // We need at least 128 documents to get bitvector posting list (see PostingStoreBase2::resizeBitVectors())
-    for (auto docid : range(100, 128)) {
-        real.update(docid, 100);
-    }
-    for (auto docid : range(300, 128)) {
-        real.update(docid, 300);
+    if (type == BasicType::STRING) {
+        populate_attribute<StringAttribute, vespalib::string>(dynamic_cast<StringAttribute&>(*attr),
+                                                              {"1", "3", "100", "300"});
+    } else {
+        populate_attribute<IntegerAttribute, int64_t>(dynamic_cast<IntegerAttribute&>(*attr),
+                                                      {1, 3, 100, 300});
     }
-    attr->commit(true);
     return attr;
 }
 
 void
-expect_has_btree_iterator(const IDirectPostingStore& store, int64_t term_value)
+expect_has_btree_iterator(const IDirectPostingStore& store, const LookupKey& key)
 {
     auto snapshot = store.get_dictionary_snapshot();
-    auto res = store.lookup(IntegerKey(term_value), snapshot);
+    auto res = store.lookup(key, snapshot);
     EXPECT_TRUE(store.has_btree_iterator(res.posting_idx));
 }
 
 void
-expect_has_bitvector_iterator(const IDirectPostingStore& store, int64_t term_value)
+expect_has_bitvector_iterator(const IDirectPostingStore& store, const LookupKey& key)
 {
     auto snapshot = store.get_dictionary_snapshot();
-    auto res = store.lookup(IntegerKey(term_value), snapshot);
+    auto res = store.lookup(key, snapshot);
     EXPECT_TRUE(store.has_bitvector(res.posting_idx));
 }
 
+template <typename LookupKeyType>
 void
 validate_posting_lists(const IDirectPostingStore& store)
 {
-    expect_has_btree_iterator(store, 1);
-    expect_has_btree_iterator(store, 3);
+    expect_has_btree_iterator(store, LookupKeyType(1));
+    expect_has_btree_iterator(store, LookupKeyType(3));
     if (store.has_always_btree_iterator()) {
-        expect_has_btree_iterator(store, 100);
-        expect_has_btree_iterator(store, 300);
+        expect_has_btree_iterator(store, LookupKeyType(100));
+        expect_has_btree_iterator(store, LookupKeyType(300));
     }
-    expect_has_bitvector_iterator(store, 100);
-    expect_has_bitvector_iterator(store, 300);
+    expect_has_bitvector_iterator(store, LookupKeyType(100));
+    expect_has_bitvector_iterator(store, LookupKeyType(300));
 }
 
 struct TestParam {
     CollectionType col_type;
-    TestParam(CollectionType col_type_in) : col_type(col_type_in) {}
+    BasicType type;
+    TestParam(CollectionType col_type_in, BasicType type_in) : col_type(col_type_in), type(type_in) {}
     ~TestParam() = default;
 };
 
 std::ostream& operator<<(std::ostream& os, const TestParam& param)
 {
-    os << param.col_type.asString();
+    os << param.col_type.asString() << "_" << param.type.asString();
     return os;
 }
 
@@ -125,6 +148,7 @@ public:
     using SingleValueBlueprintType = DirectMultiTermBlueprint<IDocidPostingStore, WeightedSetTermSearch>;
     using MultiValueBlueprintType = DirectMultiTermBlueprint<IDocidWithWeightPostingStore, WeightedSetTermSearch>;
     std::shared_ptr<AttributeVector> attr;
+    bool integer_type;
     std::shared_ptr<SingleValueBlueprintType> single_blueprint;
     std::shared_ptr<MultiValueBlueprintType> multi_blueprint;
     queryeval::ComplexLeafBlueprint* blueprint;
@@ -133,6 +157,7 @@ public:
     fef::TermFieldMatchDataArray tfmda;
     DirectMultiTermBlueprintTest()
         : attr(),
+          integer_type(true),
           single_blueprint(),
           multi_blueprint(),
           blueprint(),
@@ -142,20 +167,27 @@ public:
         tfmda.add(&tfmd);
     }
     void setup(bool field_is_filter, bool need_term_field_match_data) {
-        attr = make_attribute(field_is_filter, GetParam().col_type);
+        attr = make_attribute(GetParam().col_type, GetParam().type, field_is_filter);
+        integer_type = GetParam().type != BasicType::STRING;
         FieldSpec spec(field_name, field_id, fef::TermFieldHandle(), field_is_filter);
+        const IDirectPostingStore* store;
         if (GetParam().col_type == CollectionType::SINGLE) {
-            const auto* store = attr->as_docid_posting_store();
-            ASSERT_TRUE(store);
-            validate_posting_lists(*store);
-            single_blueprint = std::make_shared<SingleValueBlueprintType>(spec, *attr, *store, 2);
+            auto real_store = attr->as_docid_posting_store();
+            ASSERT_TRUE(real_store);
+            single_blueprint = std::make_shared<SingleValueBlueprintType>(spec, *attr, *real_store, 2);
             blueprint = single_blueprint.get();
+            store = real_store;
         } else {
-            const auto* store = attr->as_docid_with_weight_posting_store();
-            ASSERT_TRUE(store);
-            validate_posting_lists(*store);
-            multi_blueprint = std::make_shared<MultiValueBlueprintType>(spec, *attr, *store, 2);
+            auto real_store = attr->as_docid_with_weight_posting_store();
+            ASSERT_TRUE(real_store);
+            multi_blueprint = std::make_shared<MultiValueBlueprintType>(spec, *attr, *real_store, 2);
             blueprint = multi_blueprint.get();
+            store = real_store;
+        }
+        if (integer_type) {
+            validate_posting_lists<IntegerKey>(*store);
+        } else {
+            validate_posting_lists<StringKey>(*store);
         }
         blueprint->setDocIdLimit(doc_id_limit);
         if (need_term_field_match_data) {
@@ -164,11 +196,19 @@ public:
             tfmd.tagAsNotNeeded();
         }
     }
+    template <typename BlueprintType>
+    void add_term_helper(BlueprintType& b, int64_t term_value) {
+        if (integer_type) {
+            b.addTerm(IntegerKey(term_value), 1, estimate);
+        } else {
+            b.addTerm(StringKey(term_value), 1, estimate);
+        }
+    }
     void add_term(int64_t term_value) {
         if (single_blueprint) {
-            single_blueprint->addTerm(IntegerKey(term_value), 1, estimate);
+            add_term_helper(*single_blueprint, term_value);
         } else {
-            multi_blueprint->addTerm(IntegerKey(term_value), 1, estimate);
+            add_term_helper(*multi_blueprint, term_value);
         }
     }
     std::unique_ptr<SearchIterator> create_leaf_search() const {
@@ -201,7 +241,10 @@ expect_or_child(SearchIterator& itr, size_t child, const vespalib::string& exp_c
 
 INSTANTIATE_TEST_SUITE_P(DefaultInstantiation,
                          DirectMultiTermBlueprintTest,
-                         testing::Values(CollectionType::SINGLE, CollectionType::WSET),
+                         testing::Values(TestParam(CollectionType::SINGLE, BasicType::INT64),
+                                         TestParam(CollectionType::SINGLE, BasicType::STRING),
+                                         TestParam(CollectionType::WSET, BasicType::INT64),
+                                         TestParam(CollectionType::WSET, BasicType::STRING)),
                          testing::PrintToStringParamName());
 
 TEST_P(DirectMultiTermBlueprintTest, weight_iterators_used_for_none_filter_field)