package aggregate

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

func AggSumIaReadSegmentCount() Aggregator {
	return &SumIaReadSegmentCount{}
}

type SumIaReadSegmentCount struct {
	sum int64
}

var _ Aggregator = (*SumIaReadSegmentCount)(nil)

func (a *SumIaReadSegmentCount) Add(record *load.StmtRecord) {
	a.sum += record.SumIaReadSegmentCount
}

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

func (a *SumIaReadSegmentCount) Output(model *api.Model) {
	model.SumIaReadSegmentCount = a.sum
}