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Support recursive operator calls for $sum aggregation accumulator #3116

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merged 18 commits into from
Jul 31, 2023
Merged

Support recursive operator calls for $sum aggregation accumulator #3116

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noisersup Jul 26, 2023
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Merge branch 'main' into aggregation-recursive-sum-2964
mergify[bot] Jul 31, 2023
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@noisersup
noisersup committed Jul 27, 2023
commit dd70fc329c44f825d74d5d2d809931a1502390d1
18 changes: 16 additions & 2 deletions internal/handlers/common/aggregations/operators/accumulators/sum.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ import (
// sum represents $sum aggregation operator.
type sum struct {
expression *aggregations.Expression
operator *operators.Operator
operator operators.Operator
number any
}

Expand Down Expand Up @@ -62,7 +62,7 @@ func newSum(accumulation *types.Document) (Accumulator, error) {
return nil, opErr
}

accumulator.operator = &op
accumulator.operator = op

case float64:
accumulator.number = expr
Expand Down Expand Up @@ -108,6 +108,20 @@ func (s *sum) Accumulate(iter types.DocumentsIterator) (any, error) {
continue
}

if s.operator != nil {
v, err := s.operator.Process(doc)
if err != nil {
// TODO
return nil, err
}

switch v.(type) {
case float64, int32, int64:
numbers = append(numbers, v)
}

}

switch number := s.number.(type) {
case float64, int32, int64:
// For number types, the result is equivalent of iterator len*number,
Expand Down