[C++] ArrayFromJSON doesn't work for float value dictionary type

[asfimport]

The following code returns a NotImplemented error. It works without a problem for int/ string type values.

auto arr = ArrayFromJSON(dictionary(int32(), float32()), "[1, 1000]");


// output 
-- Arrow Fatal Error --
NotImplemented: JSON conversion to dictionary<values=float, indices=int32, ordered=0> not implemented
Process finished with exit code 134 (interrupted by signal 6: SIGABRT)

Reporter: Niranda Perera / @nirandaperera
Assignee: Eduardo Ponce / @edponce

PRs and other links:

• GitHub Pull Request #10746

_{Note: This issue was originally created as ARROW-13381. Please see the migration documentation for further details.}

[asfimport]

Eduardo Ponce / @edponce:
The error occurs because there is no floating-point case for dict converter in ipc/json_simple.cc. Nevertheless, there exists an implementation for floating-point converters.

The code path is as follows: Call to ArrayFromJSON(...) -> ArrayFromJSON(DataType, string_view) -> ArrayFromJSON(DataType, string_view, Array) -> GetConverter(DataType, Converter) -> GetDictConverter(DataType, Converter)

[asfimport]

David Li / @lidavidm:
Issue resolved by pull request 10746
#10746