Agg_State.h

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//
// Created by Nico on 08/05/2019.
//
 
#ifndef JODA_AGG_STATE_H
#define JODA_AGG_STATE_H
#include "Query_State.h"
 
namespace joda::queryparsing::grammar {
 
enum aggFunction {
  NOAGG,
  AVG,
  COUNT,
  SUM,
  ATTSTAT,
  DISTINCT,
  MIN,
  MAX,
  COLLECT,
  HISTOGRAM
};
 
struct aggState {
  template <typename Input>
  inline aggState(const Input &in, queryState &qs) {
    aggfun = NOAGG;
  }
 
  template <typename Input>
  inline void success(const Input &in, queryState &qs) {
    for (auto &agg : aggs) {
      qs.q->addAggregator(std::move(agg));
    }
  }
 
  inline bool putValProv(std::unique_ptr<joda::query::IValueProvider> &&val) {
    assert(val != nullptr && "Should not pass nullptr");
    if (val == nullptr) return false;
    valprov.push_back(std::move(val));
    return true;
  }
 
  std::vector<std::unique_ptr<joda::query::IValueProvider>> valprov;
  std::string toPointer;
  aggFunction aggfun;
  std::vector<std::unique_ptr<joda::query::IAggregator>> aggs;
 
  std::unique_ptr<joda::query::IValueProvider> groupedByValue = nullptr;
  std::string groupAs{};
};
}  // namespace joda::queryparsing::grammar
 
#endif  // JODA_AGG_STATE_H