Class QueryGraphCollection

src/include/binder/query/query_graph.h:145–167

QueryGraphCollection represents a pattern (a set of connected components) specified in MATCH clause.

// QueryGraphCollection represents a pattern (a set of connected components) specified in MATCH
// clause.
class QueryGraphCollection {
public:
    QueryGraphCollection() = default;
    DELETE_COPY_DEFAULT_MOVE(QueryGraphCollection);

    void merge(const QueryGraphCollection& other);
    void addAndMergeQueryGraphIfConnected(QueryGraph queryGraphToAdd);
    void finalize();

    common::idx_t getNumQueryGraphs() const { return queryGraphs.size(); }
    QueryGraph* getQueryGraphUnsafe(common::idx_t idx) { return &queryGraphs[idx]; }
    const QueryGraph* getQueryGraph(common::idx_t idx) const { return &queryGraphs[idx]; }

    bool contains(const std::string& name) const;
    LBUG_API std::vector<std::shared_ptr<NodeExpression>> getQueryNodes() const;
    LBUG_API std::vector<std::shared_ptr<RelExpression>> getQueryRels() const;

private:
    std::vector<QueryGraph> mergeGraphs(common::idx_t baseGraphIdx);

private:
    std::vector<QueryGraph> queryGraphs;
};

struct BoundGraphPattern {
    QueryGraphCollection queryGraphCollection;