void AggregatorMin::reduce(AqlValue const& cmpValue) {
if (value.isEmpty() ||
(!cmpValue.isNull(true) &&
AqlValue::Compare(trx, value, cmpValue, true) > 0)) {
// the value `null` itself will not be used in MIN() to compare lower than
// e.g. value `false`
value.destroy();
value = cmpValue.clone();
}
}
void AggregatorSum::reduce(AqlValue const& cmpValue) {
if (!invalid) {
if (cmpValue.isNull(true)) {
// ignore `null` values here
return;
}
if (cmpValue.isNumber()) {
double const number = cmpValue.toDouble(trx);
if (!std::isnan(number) && number != HUGE_VAL &&
number != -HUGE_VAL) {
sum += number;
return;
}
}
}
invalid = true;
}
void AggregatorVarianceBase::reduce(AqlValue const& cmpValue) {
if (!invalid) {
if (cmpValue.isNull(true)) {
// ignore `null` values here
return;
}
if (cmpValue.isNumber()) {
double const number = cmpValue.toDouble(trx);
if (!std::isnan(number) && number != HUGE_VAL &&
number != -HUGE_VAL) {
double const delta = number - mean;
++count;
mean += delta / count;
sum += delta * (number - mean);
return;
}
}
}
invalid = true;
}