Reference documentation and code samples for the Google Cloud Datastore v1 API class AggregationQuery.Types.Aggregation.Types.Sum.
Sum of the values of the requested property.
Only numeric values will be aggregated. All non-numeric values
including NULL are skipped.
If the aggregated values contain NaN, returns NaN. Infinity math
follows IEEE-754 standards.
If the aggregated value set is empty, returns 0.
Returns a 64-bit integer if all aggregated numbers are integers and the
sum result does not overflow. Otherwise, the result is returned as a
double. Note that even if all the aggregated values are integers, the
result is returned as a double if it cannot fit within a 64-bit signed
integer. When this occurs, the returned value will lose precision.
When underflow occurs, floating-point aggregation is non-deterministic.
This means that running the same query repeatedly without any changes to
the underlying values could produce slightly different results each
time. In those cases, values should be stored as integers over
floating-point numbers.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis page provides documentation for the \u003ccode\u003eAggregationQuery.Types.Aggregation.Types.Sum\u003c/code\u003e class within the Google Cloud Datastore v1 API, detailing its use for summing property values.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSum\u003c/code\u003e class only aggregates numeric values, skipping non-numeric values and \u003ccode\u003eNULL\u003c/code\u003e, and returns \u003ccode\u003eNaN\u003c/code\u003e if \u003ccode\u003eNaN\u003c/code\u003e values are present, following IEEE-754 standards for infinity math.\u003c/p\u003e\n"],["\u003cp\u003eWhen aggregating, the result is a 64-bit integer if all numbers are integers and the sum doesn't overflow; otherwise, it returns a double, potentially losing precision.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSum\u003c/code\u003e class implements several interfaces, including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e, and it includes constructors for default initialization and copying from an existing \u003ccode\u003eSum\u003c/code\u003e object.\u003c/p\u003e\n"],["\u003cp\u003eIt is associated with multiple versions, including the latest 4.15.0, as well as a list of versions ranging from 3.2.0 to 4.14.0, which can be accessed from the provided links.\u003c/p\u003e\n"]]],[],null,[]]
