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Type:
Bug
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Resolution: Works as Designed
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: json
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None
Since version 1.6 of the C driver, exporting data to JSON leads to unfortunate rounding/printing behavior. For example a simple value:
> db.test.insert({"x":1.8})
WriteResult({ "nInserted" : 1 })
> db.test.find()
{ "_id" : ObjectId("58a84a0325b646783be8cf6e"), "x" : 1.8 }
Previously, exporting this data with the C driver would lead to the correct output:
> mongo("test")$export() { "_id" : { "$oid" : "58a84a0325b646783be8cf6e" }, "x" : 1.8 }
However with the new C driver I get:
> mongo("test")$export() { "_id" : { "$oid" : "58a84a0325b646783be8cf6e" }, "x" : 1.8000000000000000444 }
Unfortunately this can be a serious problem for scientific applications where numeric precision is important.
- is related to
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CDRIVER-652 Number formatting and whitespace in bson_as_json
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- Closed
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- related to
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- Closed
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- Closed
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CDRIVER-4819 Allow reducing precision when converting BSON double values to JSON
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- Backlog
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