[ARROW-14647] [JavaScript] bignumToNumber returns incorrect results for negative numbers

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.0.0
• Fix Version/s: 8.0.0
• Component/s: JavaScript
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/30190
• Assignee: Bob Matcuk
• Reporter: Bob Matcuk
• Created: 09/Nov/21 20:15
• Updated: 11/Jan/23 08:41
• Resolved: 06/Apr/22 17:00

Description

I have the following in my data:

 

v = new Uint32Array([4294786450, 4294967295, 4294967295, 4294967295]) 

bignumToNumber converts this to -18446744069414765000 but it should be -180846.

I actually suspect that bignumToNumber fails on anything greater than 64 bits, but I don't have any positive test cases.

 

Issue Links

• links to: GitHub Pull Request #11655