package aggregate

import (
	"github.com/pingcap-inc/clinic/pkg/ngm/statements/api"
	"github.com/pingcap-inc/clinic/pkg/ngm/statements/load"
)

func AggPlanCacheHits() Aggregator {
	return &PlanCacheHits{}
}

type PlanCacheHits struct {
	v int64
}

var _ Aggregator = (*PlanCacheHits)(nil)

func (a *PlanCacheHits) Add(record *load.StmtRecord) {
	a.v += record.PlanCacheHits
}

func (a *PlanCacheHits) Merge(agg Aggregator) {
	if agg, ok := agg.(*PlanCacheHits); ok {
		a.v += agg.v
	}
}

func (a *PlanCacheHits) Output(model *api.Model) {
	model.PlanCacheHits = a.v
}