an aggregator that calculates the sum of the input values. Does NOT accept null input values. Accepts only Double input values (primitive and boxed). Aggregation result type is number.
null
number
Optional
extracts values from this path if given
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Returns
an aggregator that calculates the sum of the input values. Does NOT accept
nullinput values. Accepts only Double input values (primitive and boxed). Aggregation result type isnumber.