package aggregate

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

func AggSumErrors() Aggregator {
	return &SumErrors{}
}

type SumErrors struct {
	sum int
}

var _ Aggregator = (*SumErrors)(nil)

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

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

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