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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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 document provides reference documentation for the \u003ccode\u003eAggregationQuery.Types.Aggregation.Types.Sum\u003c/code\u003e class within the Google Cloud Datastore v1 API, detailing how it calculates the sum of values for a specified property.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSum\u003c/code\u003e class aggregates only numeric values, skipping non-numeric values and \u003ccode\u003eNULL\u003c/code\u003e, and will return \u003ccode\u003eNaN\u003c/code\u003e if any aggregated values are \u003ccode\u003eNaN\u003c/code\u003e, while also adhering to IEEE-754 standards for infinity math.\u003c/p\u003e\n"],["\u003cp\u003eIf the aggregated value set is empty, the \u003ccode\u003eSum\u003c/code\u003e class will return 0, and the result type is either a 64-bit integer or a double depending on whether overflow occurs, with a potential loss of precision when a double is needed to avoid overflow.\u003c/p\u003e\n"],["\u003cp\u003eThe provided content showcases a history of different versions, ranging from version 3.2.0 to the latest 4.15.0, of the \u003ccode\u003eAggregationQuery.Types.Aggregation.Types.Sum\u003c/code\u003e class for the .NET implementation of the Google Cloud Datastore V1 API.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSum\u003c/code\u003e class implements various interfaces, such as IMessage, IEquatable, IDeepCloneable, and IBufferMessage, allowing it to be used within various contexts, and has a constructor that can be called with a \u003ccode\u003eSum\u003c/code\u003e object as a parameter.\u003c/p\u003e\n"]]],[],null,[]]
