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Asked: 2026-05-20T15:16:39+00:00

Let’s say I have a Collection with two properties: amount and amountreceived that are

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Let’s say I have a Collection with two properties: amount and amountreceived that are decimals.

I want to write a query that will return items from the collection that meet the criteria of the amount being greater than the amount received.

Currently I have a javascript function that looks like this:

f = function() { return this.amount > this.amountreceived;}

I also have a collection set that looks like this:

item1 : amount = 50, amountreceived = 0;
item2 : amount = 50, amountreceived = 25;

If I run db.MyCollection.find(f) the only result returned is item1.

Any ideas on why that query will not return both results?

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1 Answer

  1. Editorial Team

    I’m assuming you are using the C# driver? Because BSON does not have a decimal data type the C# driver has to represent the .NET decimal value in some way. The default representation is as a string, which is good for not losing any precision but bad for doing queries.

    You can also ask the C# driver to store .NET decimal values as BSON doubles, which would involve some loss of precision and could overflow, but would be good for queries.

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