func (e *Evaluator) evalAggGroupConcat(v *ast.AggregateFuncExpr) {
ctx := v.GetContext()
if ctx.Buffer != nil {
v.SetString(ctx.Buffer.String())
} else {
v.SetNull()
}
}
func (e *Evaluator) evalAggAvg(v *ast.AggregateFuncExpr) {
ctx := v.GetContext()
switch x := ctx.Value.(type) {
case float64:
ctx.Value = x / float64(ctx.Count)
case mysql.Decimal:
ctx.Value = x.Div(mysql.NewDecimalFromUint(uint64(ctx.Count), 0))
}
v.SetValue(ctx.Value)
}
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()
}
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()
}
func (e *Evaluator) evalAggSetValue(v *ast.AggregateFuncExpr) {
ctx := v.GetContext()
v.SetDatum(ctx.Value)
}
func (e *Evaluator) evalAggCount(v *ast.AggregateFuncExpr) {
ctx := v.GetContext()
v.SetInt64(ctx.Count)
}
func (e *Evaluator) evalAggFirstRow(v *ast.AggregateFuncExpr) {
ctx := v.GetContext()
v.SetValue(ctx.Value)
}