From 81c57ad4a2758cc9e38864bee48d39313f1abdab Mon Sep 17 00:00:00 2001
From: Tor Egge <Tor.Egge@online.no>
Date: Tue, 5 Mar 2024 16:29:58 +0100
Subject: Adjust rewriting of number terms for string fields in streaming
 search.

---
 searchlib/src/tests/query/streaming_query_test.cpp | 25 ++++++++++++++
 .../vespa/searchlib/query/streaming/querynode.cpp  | 39 +++++++++++++++++-----
 2 files changed, 55 insertions(+), 9 deletions(-)

diff --git a/searchlib/src/tests/query/streaming_query_test.cpp b/searchlib/src/tests/query/streaming_query_test.cpp
index 5559e194c5e..2129cb6805a 100644
--- a/searchlib/src/tests/query/streaming_query_test.cpp
+++ b/searchlib/src/tests/query/streaming_query_test.cpp
@@ -380,6 +380,31 @@ TEST(StreamingQueryTest, onedot0e_is_rewritten_if_allowed_too)
     }
 }
 
+TEST(StreamingQueryTest, negative_integer_is_rewritten_if_allowed_for_string_field)
+{
+    const char term[7] = {TERM_UNIQ, 3, 1, 'c', 2, '-', '5'};
+    vespalib::stringref stackDump(term, sizeof(term));
+    EXPECT_EQ(7u, stackDump.size());
+    AllowRewrite empty("c");
+    const Query q(empty, stackDump);
+    EXPECT_TRUE(q.valid());
+    auto& root = q.getRoot();
+    auto& equiv = dynamic_cast<const EquivQueryNode &>(root);
+    EXPECT_EQ(2u, equiv.get_terms().size());
+    {
+        auto& qt = *equiv.get_terms()[0];
+        EXPECT_EQ("c", qt.index());
+        EXPECT_EQ(vespalib::stringref("-5"), qt.getTerm());
+        EXPECT_EQ(3u, qt.uniqueId());
+    }
+    {
+        auto& qt = *equiv.get_terms()[1];
+        EXPECT_EQ("c", qt.index());
+        EXPECT_EQ(vespalib::stringref("5"), qt.getTerm());
+        EXPECT_EQ(0u, qt.uniqueId());
+    }
+}
+
 TEST(StreamingQueryTest, test_get_query_parts)
 {
     QueryBuilder<SimpleQueryNodeTypes> builder;
diff --git a/searchlib/src/vespa/searchlib/query/streaming/querynode.cpp b/searchlib/src/vespa/searchlib/query/streaming/querynode.cpp
index 16406bffd3d..55301132a18 100644
--- a/searchlib/src/vespa/searchlib/query/streaming/querynode.cpp
+++ b/searchlib/src/vespa/searchlib/query/streaming/querynode.cpp
@@ -14,10 +14,13 @@
 #include <vespa/searchlib/query/streaming/wand_term.h>
 #include <vespa/searchlib/query/streaming/weighted_set_term.h>
 #include <vespa/searchlib/query/tree/term_vector.h>
+#include <vespa/searchlib/queryeval/split_float.h>
 #include <charconv>
 #include <vespa/log/log.h>
 LOG_SETUP(".vsm.querynode");
 
+using search::queryeval::SplitFloat;
+
 namespace search::streaming {
 
 namespace {
@@ -29,7 +32,7 @@ bool disableRewrite(const QueryNode * qn) {
 }
 
 bool possibleFloat(const QueryTerm & qt, const QueryTerm::string & term) {
-    return !qt.encoding().isBase10Integer() && qt.encoding().isFloat() && (term.find('.') != QueryTerm::string::npos);
+    return qt.encoding().isFloat() && ((term.find('.') != QueryTerm::string::npos) || (term.find('-') != QueryTerm::string::npos));
 }
 
 }
@@ -139,14 +142,32 @@ QueryNode::Build(const QueryNode * parent, const QueryNodeResultFactory & factor
             qt->setUniqueId(queryRep.getUniqueId());
             qt->setRanked( ! queryRep.hasNoRankFlag());
             if (allowRewrite && possibleFloat(*qt, ssTerm) && factory.allow_float_terms_rewrite(ssIndex)) {
-                auto phrase = std::make_unique<PhraseQueryNode>(factory.create(), ssIndex, arity);
-                auto dotPos = ssTerm.find('.');
-                phrase->add_term(std::make_unique<QueryTerm>(factory.create(), ssTerm.substr(0, dotPos), ssIndex, TermType::WORD, normalize_mode));
-                phrase->add_term(std::make_unique<QueryTerm>(factory.create(), ssTerm.substr(dotPos + 1), ssIndex, TermType::WORD, normalize_mode));
-                auto eqn = std::make_unique<EquivQueryNode>(factory.create(), 2);
-                eqn->add_term(std::move(qt));
-                eqn->add_term(std::move(phrase));
-                qn = std::move(eqn);
+                /*
+                 * Tokenize number term and make add alternative
+                 * phrase or term when searching for numbers in string
+                 * fields. See
+                 * CreateBlueprintVisitorHelper::handleNumberTermAsText()
+                 * for similar code used for indexed search.
+                 */
+                SplitFloat splitter(ssTerm);
+                std::unique_ptr<QueryTerm> alt_qt;
+                if (splitter.parts() > 1) {
+                    auto phrase = std::make_unique<PhraseQueryNode>(factory.create(), ssIndex, splitter.parts());
+                    for (size_t i = 0; i < splitter.parts(); ++i) {
+                        phrase->add_term(std::make_unique<QueryTerm>(factory.create(), splitter.getPart(i), ssIndex, TermType::WORD, normalize_mode));
+                    }
+                    alt_qt = std::move(phrase);
+                } else if (splitter.parts() == 1 && ssTerm != splitter.getPart(0)) {
+                    alt_qt = std::make_unique<QueryTerm>(factory.create(), splitter.getPart(0), ssIndex, TermType::WORD, normalize_mode);
+                }
+                if (alt_qt) {
+                    auto eqn = std::make_unique<EquivQueryNode>(factory.create(), 2);
+                    eqn->add_term(std::move(qt));
+                    eqn->add_term(std::move(alt_qt));
+                    qn = std::move(eqn);
+                } else {
+                    qn = std::move(qt);
+                }
             } else {
                 qn = std::move(qt);
             }
-- 
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