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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "query.h"
#include "nearest_neighbor_query_node.h"
#include <vespa/searchlib/parsequery/stackdumpiterator.h>
#include <charconv>
#include <vespa/log/log.h>
LOG_SETUP(".vsm.querynode");
namespace search::streaming {
namespace {
vespalib::stringref DEFAULT("default");
bool disableRewrite(const QueryNode * qn) {
return dynamic_cast<const NearQueryNode *> (qn) ||
dynamic_cast<const PhraseQueryNode *> (qn) ||
dynamic_cast<const SameElementQueryNode *>(qn);
}
}
QueryNode::UP
QueryNode::Build(const QueryNode * parent, const QueryNodeResultFactory & factory,
SimpleQueryStackDumpIterator & queryRep, bool allowRewrite)
{
unsigned int arity = queryRep.getArity();
ParseItem::ItemType type = queryRep.getType();
UP qn;
switch (type) {
case ParseItem::ITEM_AND:
case ParseItem::ITEM_OR:
case ParseItem::ITEM_WEAK_AND:
case ParseItem::ITEM_EQUIV:
case ParseItem::ITEM_WEIGHTED_SET:
case ParseItem::ITEM_DOT_PRODUCT:
case ParseItem::ITEM_WAND:
case ParseItem::ITEM_NOT:
case ParseItem::ITEM_PHRASE:
case ParseItem::ITEM_SAME_ELEMENT:
case ParseItem::ITEM_NEAR:
case ParseItem::ITEM_ONEAR:
{
qn = QueryConnector::create(type);
if (qn) {
QueryConnector * qc = dynamic_cast<QueryConnector *> (qn.get());
NearQueryNode * nqn = dynamic_cast<NearQueryNode *> (qc);
if (nqn) {
nqn->distance(queryRep.getNearDistance());
}
if ((type == ParseItem::ITEM_WEAK_AND) ||
(type == ParseItem::ITEM_WEIGHTED_SET) ||
(type == ParseItem::ITEM_DOT_PRODUCT) ||
(type == ParseItem::ITEM_SAME_ELEMENT) ||
(type == ParseItem::ITEM_WAND))
{
qn->setIndex(queryRep.getIndexName());
}
for (size_t i=0; i < arity; i++) {
queryRep.next();
if (qc->isFlattenable(queryRep.getType())) {
arity += queryRep.getArity();
} else {
qc->addChild(Build(qc, factory, queryRep, allowRewrite && !disableRewrite(qn.get())));
}
}
}
}
break;
case ParseItem::ITEM_TRUE:
qn = std::make_unique<TrueNode>();
break;
case ParseItem::ITEM_FALSE:
qn = std::make_unique<FalseNode>();
break;
case ParseItem::ITEM_GEO_LOCATION_TERM:
// just keep the string representation here; parsed in vsm::GeoPosFieldSearcher
qn = std::make_unique<QueryTerm>(factory.create(),
queryRep.getTerm(),
queryRep.getIndexName(),
QueryTerm::Type::GEO_LOCATION);
break;
case ParseItem::ITEM_NEAREST_NEIGHBOR:
qn = build_nearest_neighbor_query_node(factory, queryRep);
break;
case ParseItem::ITEM_NUMTERM:
case ParseItem::ITEM_TERM:
case ParseItem::ITEM_PREFIXTERM:
case ParseItem::ITEM_REGEXP:
case ParseItem::ITEM_SUBSTRINGTERM:
case ParseItem::ITEM_EXACTSTRINGTERM:
case ParseItem::ITEM_SUFFIXTERM:
case ParseItem::ITEM_PURE_WEIGHTED_STRING:
case ParseItem::ITEM_PURE_WEIGHTED_LONG:
case ParseItem::ITEM_FUZZY:
{
vespalib::string index = queryRep.getIndexName();
if (index.empty()) {
if ((type == ParseItem::ITEM_PURE_WEIGHTED_STRING) || (type == ParseItem::ITEM_PURE_WEIGHTED_LONG)) {
index = parent->getIndex();
} else {
index = DEFAULT;
}
}
if (dynamic_cast<const SameElementQueryNode *>(parent) != nullptr) {
index = parent->getIndex() + "." + index;
}
using TermType = QueryTerm::Type;
TermType sTerm(TermType::WORD);
switch (type) {
case ParseItem::ITEM_REGEXP:
sTerm = TermType::REGEXP;
break;
case ParseItem::ITEM_PREFIXTERM:
sTerm = TermType::PREFIXTERM;
break;
case ParseItem::ITEM_SUBSTRINGTERM:
sTerm = TermType::SUBSTRINGTERM;
break;
case ParseItem::ITEM_EXACTSTRINGTERM:
sTerm = TermType::EXACTSTRINGTERM;
break;
case ParseItem::ITEM_SUFFIXTERM:
sTerm = TermType::SUFFIXTERM;
break;
case ParseItem::ITEM_FUZZY:
sTerm = TermType::FUZZYTERM;
break;
default:
break;
}
QueryTerm::string ssTerm;
if (type == ParseItem::ITEM_PURE_WEIGHTED_LONG) {
char buf[24];
auto res = std::to_chars(buf, buf + sizeof(buf), queryRep.getIntergerTerm(), 10);
ssTerm.assign(buf, res.ptr - buf);
} else {
ssTerm = queryRep.getTerm();
}
QueryTerm::string ssIndex(index);
if (ssIndex == "sddocname") {
// This is suboptimal as the term should be checked too.
// But it will do for now as only correct sddocname queries are sent down.
qn = std::make_unique<TrueNode>();
} else {
auto qt = std::make_unique<QueryTerm>(factory.create(), ssTerm, ssIndex, sTerm);
qt->setWeight(queryRep.GetWeight());
qt->setUniqueId(queryRep.getUniqueId());
if (qt->isFuzzy()) {
qt->setFuzzyMaxEditDistance(queryRep.getFuzzyMaxEditDistance());
qt->setFuzzyPrefixLength(queryRep.getFuzzyPrefixLength());
}
if (qt->encoding().isBase10Integer() ||
! qt->encoding().isFloat() ||
! factory.getRewriteFloatTerms() ||
! allowRewrite ||
(ssTerm.find('.') == vespalib::string::npos))
{
qn = std::move(qt);
} else {
auto phrase = std::make_unique<PhraseQueryNode>();
phrase->addChild(std::make_unique<QueryTerm>(factory.create(), ssTerm.substr(0, ssTerm.find('.')), ssIndex, TermType::WORD));
phrase->addChild(std::make_unique<QueryTerm>(factory.create(), ssTerm.substr(ssTerm.find('.') + 1), ssIndex, TermType::WORD));
auto orqn = std::make_unique<EquivQueryNode>();
orqn->addChild(std::move(qt));
orqn->addChild(std::move(phrase));
qn = std::move(orqn);
}
}
}
break;
case ParseItem::ITEM_RANK:
{
if (arity >= 1) {
queryRep.next();
qn = Build(parent, factory, queryRep, false);
for (uint32_t skipCount = arity-1; (skipCount > 0) && queryRep.next(); skipCount--) {
skipCount += queryRep.getArity();
}
}
}
break;
default:
{
for (uint32_t skipCount = arity; (skipCount > 0) && queryRep.next(); skipCount--) {
skipCount += queryRep.getArity();
LOG(warning, "Does not understand anything,.... skipping %d", type);
}
}
break;
}
return qn;
}
const HitList & QueryNode::evaluateHits(HitList & hl) const
{
return hl;
}
std::unique_ptr<QueryNode>
QueryNode::build_nearest_neighbor_query_node(const QueryNodeResultFactory& factory, SimpleQueryStackDumpIterator& query_rep)
{
vespalib::stringref query_tensor_name = query_rep.getTerm();
vespalib::stringref field_name = query_rep.getIndexName();
int32_t unique_id = query_rep.getUniqueId();
auto weight = query_rep.GetWeight();
uint32_t target_hits = query_rep.getTargetHits();
double distance_threshold = query_rep.getDistanceThreshold();
return std::make_unique<NearestNeighborQueryNode>(factory.create(),
query_tensor_name,
field_name,
target_hits,
distance_threshold,
unique_id,
weight);
}
}
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