Add multi-scan asp

src/include/optimizer/asp_optimizer.h

@@ -18,12 +18,13 @@ class ASPOptimizer : public LogicalOperatorVisitor {
 
     bool isProbeSideQualified(planner::LogicalOperator* probeRoot);
 
-    std::vector<planner::LogicalOperator*> resolveScanNodesToApplySemiMask(
+    binder::expression_map<std::vector<planner::LogicalOperator*>> resolveScanNodesToApplySemiMask(
         const binder::expression_vector& nodeIDCandidates,
         const std::vector<planner::LogicalOperator*>& buildRoots);
 
     void applyASP(
-        const std::vector<planner::LogicalOperator*>& scanNodes, planner::LogicalOperator* op);
+        const binder::expression_map<std::vector<planner::LogicalOperator*>>& nodeIDToScanNodes,
+        planner::LogicalOperator* op);
 };
 
 } // namespace optimizer

src/include/planner/logical_plan/logical_operator/logical_semi_masker.h

@@ -9,24 +9,29 @@ namespace planner {
 
 class LogicalSemiMasker : public LogicalOperator {
 public:
-    LogicalSemiMasker(LogicalScanNode* scanNode, std::shared_ptr<LogicalOperator> child)
-        : LogicalOperator{LogicalOperatorType::SEMI_MASKER, std::move(child)}, scanNode{scanNode} {}
+    LogicalSemiMasker(std::shared_ptr<binder::Expression> nodeID,
+        std::vector<LogicalOperator*> scanNodes, std::shared_ptr<LogicalOperator> child)
+        : LogicalOperator{LogicalOperatorType::SEMI_MASKER, std::move(child)},
+          nodeID{std::move(nodeID)}, scanNodes{std::move(scanNodes)} {}
 
     inline void computeFactorizedSchema() override { copyChildSchema(0); }
     inline void computeFlatSchema() override { copyChildSchema(0); }
 
-    inline std::string getExpressionsForPrinting() const override {
-        return scanNode->getNode()->toString();
-    }
+    inline std::string getExpressionsForPrinting() const override { return nodeID->toString(); }
 
-    inline LogicalScanNode* getScanNode() const { return scanNode; }
+    inline std::shared_ptr<binder::Expression> getNodeID() const { return nodeID; }
+    inline bool isMultiLabel() const {
+        return ((LogicalScanNode*)scanNodes[0])->getNode()->isMultiLabeled();
+    }
+    inline std::vector<LogicalOperator*> getScanNodes() const { return scanNodes; }
 
     inline std::unique_ptr<LogicalOperator> copy() override {
-        return make_unique<LogicalSemiMasker>(scanNode, children[0]->copy());
+        return make_unique<LogicalSemiMasker>(nodeID, scanNodes, children[0]->copy());
     }
 
 private:
-    LogicalScanNode* scanNode;
+    std::shared_ptr<binder::Expression> nodeID;
+    std::vector<LogicalOperator*> scanNodes;
 };
 
 } // namespace planner

src/include/processor/operator/semi_masker.h

@@ -6,66 +6,67 @@
 namespace kuzu {
 namespace processor {
 
+// Multiple maskers can point to the same SemiMask, thus we associate each masker with an idx
+// to indicate the execution sequence of its pipeline. Also, the maskerIdx is used as a flag to
+// indicate if a value in the mask is masked or not, as each masker will increment the selected
+// value in the mask by 1. More details are described in NodeTableSemiMask.
+using mask_and_idx_pair = std::pair<NodeTableSemiMask*, uint8_t>;
+
 class BaseSemiMasker : public PhysicalOperator {
 protected:
-    BaseSemiMasker(const DataPos& keyDataPos, ScanNodeIDSharedState* scanNodeIDSharedState,
+    BaseSemiMasker(const DataPos& keyDataPos, std::vector<ScanNodeIDSharedState*> scanStates,
         std::unique_ptr<PhysicalOperator> child, uint32_t id, const std::string& paramsString)
         : PhysicalOperator{PhysicalOperatorType::SEMI_MASKER, std::move(child), id, paramsString},
-          keyDataPos{keyDataPos}, scanNodeIDSharedState{scanNodeIDSharedState} {}
+          keyDataPos{keyDataPos}, scanStates{std::move(scanStates)} {}
 
     void initLocalStateInternal(ResultSet* resultSet, ExecutionContext* context) override;
 
 protected:
     DataPos keyDataPos;
-    ScanNodeIDSharedState* scanNodeIDSharedState;
+    std::vector<ScanNodeIDSharedState*> scanStates;
     std::shared_ptr<common::ValueVector> keyValueVector;
 };
 
 class SingleTableSemiMasker : public BaseSemiMasker {
 public:
-    SingleTableSemiMasker(const DataPos& keyDataPos, ScanNodeIDSharedState* scanNodeIDSharedState,
+    SingleTableSemiMasker(const DataPos& keyDataPos, std::vector<ScanNodeIDSharedState*> scanStates,
         std::unique_ptr<PhysicalOperator> child, uint32_t id, const std::string& paramsString)
-        : BaseSemiMasker{keyDataPos, scanNodeIDSharedState, std::move(child), id, paramsString} {}
+        : BaseSemiMasker{keyDataPos, std::move(scanStates), std::move(child), id, paramsString} {}
 
     void initGlobalStateInternal(kuzu::processor::ExecutionContext* context) override;
 
     bool getNextTuplesInternal() override;
 
     inline std::unique_ptr<PhysicalOperator> clone() override {
         auto result = std::make_unique<SingleTableSemiMasker>(
-            keyDataPos, scanNodeIDSharedState, children[0]->clone(), id, paramsString);
-        result->maskerIdxAndMask = maskerIdxAndMask;
+            keyDataPos, scanStates, children[0]->clone(), id, paramsString);
+        result->maskPerScan = maskPerScan;
         return result;
     }
 
 private:
-    // Multiple maskers can point to the same SemiMask, thus we associate each masker with an idx
-    // to indicate the execution sequence of its pipeline. Also, the maskerIdx is used as a flag to
-    // indicate if a value in the mask is masked or not, as each masker will increment the selected
-    // value in the mask by 1. More details are described in NodeTableSemiMask.
-    std::pair<uint8_t, NodeTableSemiMask*> maskerIdxAndMask;
+    std::vector<mask_and_idx_pair> maskPerScan;
 };
 
 class MultiTableSemiMasker : public BaseSemiMasker {
 public:
-    MultiTableSemiMasker(const DataPos& keyDataPos, ScanNodeIDSharedState* scanNodeIDSharedState,
+    MultiTableSemiMasker(const DataPos& keyDataPos, std::vector<ScanNodeIDSharedState*> scanStates,
         std::unique_ptr<PhysicalOperator> child, uint32_t id, const std::string& paramsString)
-        : BaseSemiMasker{keyDataPos, scanNodeIDSharedState, std::move(child), id, paramsString} {}
+        : BaseSemiMasker{keyDataPos, std::move(scanStates), std::move(child), id, paramsString} {}
 
     void initGlobalStateInternal(kuzu::processor::ExecutionContext* context) override;
 
     bool getNextTuplesInternal() override;
 
     inline std::unique_ptr<PhysicalOperator> clone() override {
         auto result = std::make_unique<MultiTableSemiMasker>(
-            keyDataPos, scanNodeIDSharedState, children[0]->clone(), id, paramsString);
-        result->maskerIdxAndMasks = maskerIdxAndMasks;
+            keyDataPos, scanStates, children[0]->clone(), id, paramsString);
+        result->maskerPerLabelPerScan = maskerPerLabelPerScan;
         return result;
     }
 
 private:
-    std::unordered_map<common::table_id_t, std::pair<uint8_t, NodeTableSemiMask*>>
-        maskerIdxAndMasks;
+    std::vector<std::unordered_map<common::table_id_t, mask_and_idx_pair>> maskerPerLabelPerScan;
 };
 
 } // namespace processor

src/optimizer/asp_optimizer.cpp

@@ -72,8 +72,8 @@ bool ASPOptimizer::isProbeSideQualified(planner::LogicalOperator* probeRoot) {
     return true;
 }
 
-std::vector<planner::LogicalOperator*> ASPOptimizer::resolveScanNodesToApplySemiMask(
-    const binder::expression_vector& nodeIDCandidates,
+binder::expression_map<std::vector<planner::LogicalOperator*>>
+ASPOptimizer::resolveScanNodesToApplySemiMask(const binder::expression_vector& nodeIDCandidates,
     const std::vector<planner::LogicalOperator*>& buildRoots) {
     binder::expression_map<std::vector<LogicalOperator*>> nodeIDToScanOperatorsMap;
     for (auto& buildRoot : buildRoots) {
@@ -89,27 +89,23 @@ std::vector<planner::LogicalOperator*> ASPOptimizer::resolveScanNodesToApplySemi
         }
     }
     // Match node ID candidate with scanNode operators.
-    std::vector<LogicalOperator*> result;
+    binder::expression_map<std::vector<planner::LogicalOperator*>> result;
     for (auto& nodeID : nodeIDCandidates) {
         if (!nodeIDToScanOperatorsMap.contains(nodeID)) {
             // No scan on the build side to push semi mask to.
             continue;
         }
-        if (nodeIDToScanOperatorsMap.at(nodeID).size() > 1) {
-            // We don't push semi mask to multiple scans. This can be solved.
-            continue;
-        }
-        result.push_back(nodeIDToScanOperatorsMap.at(nodeID)[0]);
+        result.insert({nodeID, nodeIDToScanOperatorsMap.at(nodeID)});
     }
     return result;
 }
 
 void ASPOptimizer::applyASP(
-    const std::vector<planner::LogicalOperator*>& scanNodes, planner::LogicalOperator* op) {
+    const binder::expression_map<std::vector<planner::LogicalOperator*>>& nodeIDToScanNodes,
+    planner::LogicalOperator* op) {
     auto currentChild = op->getChild(0);
-    for (auto& op_ : scanNodes) {
-        auto scanNode = (LogicalScanNode*)op_;
-        auto semiMasker = std::make_shared<LogicalSemiMasker>(scanNode, currentChild);
+    for (auto& [nodeID, scanNodes] : nodeIDToScanNodes) {
+        auto semiMasker = std::make_shared<LogicalSemiMasker>(nodeID, scanNodes, currentChild);
         semiMasker->computeFlatSchema();
         currentChild = semiMasker;
     }

src/processor/mapper/map_asp.cpp

@@ -29,17 +29,19 @@ std::unique_ptr<PhysicalOperator> PlanMapper::mapLogicalSemiMaskerToPhysical(
     auto logicalSemiMasker = (LogicalSemiMasker*)logicalOperator;
     auto inSchema = logicalSemiMasker->getChild(0)->getSchema();
     auto prevOperator = mapLogicalOperatorToPhysical(logicalOperator->getChild(0));
-    auto logicalScanNode = logicalSemiMasker->getScanNode();
-    auto physicalScanNode = (ScanNodeID*)logicalOpToPhysicalOpMap.at(logicalScanNode);
-    auto keyDataPos =
-        DataPos(inSchema->getExpressionPos(*logicalScanNode->getNode()->getInternalIDProperty()));
-    if (physicalScanNode->getSharedState()->getNumTableStates() > 1) {
-        return std::make_unique<MultiTableSemiMasker>(keyDataPos,
-            physicalScanNode->getSharedState(), std::move(prevOperator), getOperatorID(),
+    std::vector<ScanNodeIDSharedState*> scanStates;
+    for (auto& op : logicalSemiMasker->getScanNodes()) {
+        auto physicalScanNode = (ScanNodeID*)logicalOpToPhysicalOpMap.at(op);
+        scanStates.push_back(physicalScanNode->getSharedState());
+    }
+    auto keyDataPos = DataPos(inSchema->getExpressionPos(*logicalSemiMasker->getNodeID()));
+    if (logicalSemiMasker->isMultiLabel()) {
+        return std::make_unique<MultiTableSemiMasker>(keyDataPos, std::move(scanStates),
+            std::move(prevOperator), getOperatorID(),
             logicalSemiMasker->getExpressionsForPrinting());
     } else {
-        return std::make_unique<SingleTableSemiMasker>(keyDataPos,
-            physicalScanNode->getSharedState(), std::move(prevOperator), getOperatorID(),
+        return std::make_unique<SingleTableSemiMasker>(keyDataPos, std::move(scanStates),
+            std::move(prevOperator), getOperatorID(),
             logicalSemiMasker->getExpressionsForPrinting());
     }
 }

src/processor/operator/semi_masker.cpp

@@ -10,44 +10,50 @@ void BaseSemiMasker::initLocalStateInternal(ResultSet* resultSet, ExecutionConte
     assert(keyValueVector->dataType.typeID == INTERNAL_ID);
 }
 
-static std::pair<uint8_t, NodeTableSemiMask*> initSemiMaskForTableState(
+static mask_and_idx_pair initSemiMaskForTableState(
     NodeTableState* tableState, transaction::Transaction* trx) {
     tableState->initSemiMask(trx);
     auto maskerIdx = tableState->getNumMaskers();
     assert(maskerIdx < UINT8_MAX);
     tableState->incrementNumMaskers();
-    return std::make_pair(maskerIdx, tableState->getSemiMask());
+    return std::make_pair(tableState->getSemiMask(), maskerIdx);
 }
 
 void SingleTableSemiMasker::initGlobalStateInternal(kuzu::processor::ExecutionContext* context) {
-    assert(scanNodeIDSharedState->getNumTableStates() == 1);
-    auto tableState = scanNodeIDSharedState->getTableState(0);
-    maskerIdxAndMask = initSemiMaskForTableState(tableState, context->transaction);
+    for (auto& scanState : scanStates) {
+        assert(scanState->getNumTableStates() == 1);
+        auto tableState = scanState->getTableState(0);
+        maskPerScan.push_back(initSemiMaskForTableState(tableState, context->transaction));
+    }
 }
 
 bool SingleTableSemiMasker::getNextTuplesInternal() {
     if (!children[0]->getNextTuple()) {
         return false;
     }
-    auto [maskerIdx, mask] = maskerIdxAndMask;
     auto numValues =
         keyValueVector->state->isFlat() ? 1 : keyValueVector->state->selVector->selectedSize;
-    for (auto i = 0u; i < numValues; i++) {
-        auto pos = keyValueVector->state->selVector->selectedPositions[i];
-        auto nodeID = keyValueVector->getValue<nodeID_t>(pos);
-        mask->incrementMaskValue(nodeID.offset, maskerIdx);
+    for (auto [mask, maskerIdx] : maskPerScan) {
+        for (auto i = 0u; i < numValues; i++) {
+            auto pos = keyValueVector->state->selVector->selectedPositions[i];
+            auto nodeID = keyValueVector->getValue<nodeID_t>(pos);
+            mask->incrementMaskValue(nodeID.offset, maskerIdx);
+        }
     }
     metrics->numOutputTuple.increase(numValues);
     return true;
 }
 
 void MultiTableSemiMasker::initGlobalStateInternal(kuzu::processor::ExecutionContext* context) {
-    assert(scanNodeIDSharedState->getNumTableStates() > 1);
-    for (auto i = 0u; i < scanNodeIDSharedState->getNumTableStates(); ++i) {
-        auto tableState = scanNodeIDSharedState->getTableState(i);
-        auto maskerIdxAndMask = initSemiMaskForTableState(tableState, context->transaction);
-        maskerIdxAndMasks.insert(
-            {tableState->getTable()->getTableID(), std::move(maskerIdxAndMask)});
+    for (auto& scanState : scanStates) {
+        assert(scanState->getNumTableStates() > 1);
+        std::unordered_map<common::table_id_t, mask_and_idx_pair> maskerPerLabel;
+        for (auto i = 0u; i < scanState->getNumTableStates(); ++i) {
+            auto tableState = scanState->getTableState(i);
+            maskerPerLabel.insert({tableState->getTable()->getTableID(),
+                initSemiMaskForTableState(tableState, context->transaction)});
+        }
+        maskerPerLabelPerScan.push_back(std::move(maskerPerLabel));
     }
 }
 
@@ -57,11 +63,13 @@ bool MultiTableSemiMasker::getNextTuplesInternal() {
     }
     auto numValues =
         keyValueVector->state->isFlat() ? 1 : keyValueVector->state->selVector->selectedSize;
-    for (auto i = 0u; i < numValues; i++) {
-        auto pos = keyValueVector->state->selVector->selectedPositions[i];
-        auto nodeID = keyValueVector->getValue<nodeID_t>(pos);
-        auto [maskerIdx, mask] = maskerIdxAndMasks.at(nodeID.tableID);
-        mask->incrementMaskValue(nodeID.offset, maskerIdx);
+    for (auto& maskerPerLabel : maskerPerLabelPerScan) {
+        for (auto i = 0u; i < numValues; i++) {
+            auto pos = keyValueVector->state->selVector->selectedPositions[i];
+            auto nodeID = keyValueVector->getValue<nodeID_t>(pos);
+            auto [mask, maskerIdx] = maskerPerLabel.at(nodeID.tableID);
+            mask->incrementMaskValue(nodeID.offset, maskerIdx);
+        }
     }
     metrics->numOutputTuple.increase(numValues);
     return true;

test/test_files/tinysnb/asp/asp.test

@@ -35,6 +35,13 @@ Dan|Carol
 Carol
 Dan
 
+-NAME AspOneMaskToMultiScan
+-QUERY MATCH (a:person)-[e1:knows]->(b:person), (a)-[e2:knows]->(b), (a)-[e3:knows]->(c:person)-[e4:knows]->(d:person) WHERE e1.date=date('1950-05-14') AND a.ID>0 AND c.fName='Bob' AND d.fName='Carol' RETURN a.fName, b.fName
+-ENUMERATE
+---- 2
+Carol|Bob
+Dan|Bob
+
 -NAME AspIntersect
 -QUERY MATCH (a:person)<-[e1:knows]-(b:person)-[e2:knows]->(c:person), (a)-[e3:knows]->(c) WHERE b.fName='Bob' AND a.fName='Alice' RETURN COUNT(*)
 -ENUMERATE