DapperLib / DapperLib/Dapper

Handle NaN value in Numeric field

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C#
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Description

If a Numeric field contains a NaN value there is an error thrown even if the class type is double or decimal?.

Instead of throwing an exception a double.NaN should be returned, and in the case of nullable decimal perhaps null.

Here is the question on Stack Overflow with reproduction steps.

https://stackoverflow.com/questions/73854808/dapper-query-with-nan-values/73873429#73873429

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the Stack Overflow reproduction linked in the issue and trace Dapper's numeric-field mapping for double and nullable decimal values. Add regression coverage for NaN handling, then verify that non-nullable double returns double.NaN and nullable decimal follows the requested null behavior without throwing.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, sql
Domain
backend, database
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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