count_vertices.h

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#ifndef ENGINES_GRAPH_DB_APP_BUILDIN_COUNT_VERTICES_H_
#define ENGINES_GRAPH_DB_APP_BUILDIN_COUNT_VERTICES_H_
#include "flex/engines/graph_db/database/graph_db_session.h"
#include "flex/engines/hqps_db/app/interactive_app_base.h"
 
namespace gs {
// A simple app to count the number of vertices of a given label.
class CountVertices : public CypherInternalPbWriteAppBase {
 public:
  CountVertices() {}
  bool DoQuery(GraphDBSession& sess, Decoder& input, Encoder& output) override;
};
 
class CountVerticesFactory : public AppFactoryBase {
 public:
  CountVerticesFactory() = default;
  ~CountVerticesFactory() = default;
 
  AppWrapper CreateApp(const GraphDB& db) override;
};
 
}  // namespace gs
 
#endif  // ENGINES_GRAPH_DB_APP_BUILDIN_COUNT_VERTICES_H_