package aggregate

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

func AggSumWarnings() Aggregator {
	return &SumWarnings{}
}

type SumWarnings struct {
	sum int
}

var _ Aggregator = (*SumWarnings)(nil)

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

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

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