Method constructRelScan

src/planner/join_order/join_tree_constructor.cpp:161–177

}

JoinTreeConstructor::IntermediateResult JoinTreeConstructor::constructRelScan(
    std::shared_ptr<binder::Expression> expr) {
    auto& rel = expr->constCast<RelExpression>();
    auto relIdx = queryGraph.getQueryRelIdx(rel.getUniqueName());
    auto emptySubgraph = SubqueryGraph(queryGraph);
    auto newSubgraph = SubqueryGraph(queryGraph);
    newSubgraph.addQueryRel(relIdx);
    auto properties = propertyCollection.getProperties(*expr);
    auto predicates =
        Planner::getNewlyMatchedExprs(emptySubgraph, newSubgraph, queryGraphPredicates);
    auto relScanInfo = NodeRelScanInfo(expr, properties);
    relScanInfo.predicates = predicates;
    auto extraInfo = std::make_unique<ExtraScanTreeNodeInfo>();
    extraInfo->relInfos.push_back(std::move(relScanInfo));
    auto treeNode = std::make_shared<JoinTreeNode>(TreeNodeType::REL_SCAN, std::move(extraInfo));
    return {treeNode, newSubgraph};
}

std::shared_ptr<JoinTreeNode> JoinTreeConstructor::tryConstructNestedLoopJoin(
    std::vector<std::shared_ptr<NodeExpression>> joinNodes, const JoinTreeNode& leftRoot,