Пример #1
0
func (e *Evaluator) evalAggAvg(v *ast.AggregateFuncExpr) {
	ctx := v.GetContext()
	switch x := ctx.Value.(type) {
	case float64:
		t := x / float64(ctx.Count)
		ctx.Value = t
		v.SetFloat64(t)
	case mysql.Decimal:
		t := x.Div(mysql.NewDecimalFromUint(uint64(ctx.Count), 0))
		ctx.Value = t
		v.SetMysqlDecimal(t)
	}
}
Пример #2
0
func (e *Evaluator) evalAggAvg(v *ast.AggregateFuncExpr) {
	ctx := v.GetContext()
	switch ctx.Value.Kind() {
	case types.KindFloat64:
		t := ctx.Value.GetFloat64() / float64(ctx.Count)
		v.SetValue(t)
	case types.KindMysqlDecimal:
		x := ctx.Value.GetMysqlDecimal()
		t := x.Div(mysql.NewDecimalFromUint(uint64(ctx.Count), 0))
		v.SetMysqlDecimal(t)
	}
	ctx.Value = *v.GetDatum()
}
Пример #3
0
func (e *Evaluator) evalAggAvg(v *ast.AggregateFuncExpr) {
	ctx := v.GetContext()
	switch ctx.Value.Kind() {
	case types.KindFloat64:
		t := ctx.Value.GetFloat64() / float64(ctx.Count)
		v.SetValue(t)
	case types.KindMysqlDecimal:
		x := ctx.Value.GetMysqlDecimal()
		var y, to mysql.MyDecimal
		y.FromUint(uint64(ctx.Count))
		mysql.DecimalDiv(x, &y, &to, mysql.DivFracIncr)
		to.Round(&to, ctx.Value.Frac()+mysql.DivFracIncr)
		v.SetMysqlDecimal(&to)
	}
	ctx.Value = *v.GetDatum()
}