[GitHub] [couchdb] yxuco opened a new issue #3797: Cannot sum BigInt

[GitBox <gi...@apache.org>]

yxuco opened a new issue #3797:
URL: https://github.com/apache/couchdb/issues/3797


   ## Description
   
   I tried to use the following reduce function to sum big numbers, but the returned value is null.  How should I sum big numbers in a reduce function?
   
   ```
   function (keys, values, rereduce) {
     let s = BigInt(0);
     values.forEach(v => {
         s += BigInt(v);
     });
     return s.toString();
   }
   ```
   
   ## Steps to Reproduce
   
   In Fauxton UI,
   * Create 2 docs that contains an attribute value of "29319221615428073";
   * Create a view using the above reduce function;
   * Run a query with reduce turned on 
   
   ## Expected Behaviour
   
   The query result should show the sum of the big numbers, e.g. `58638443230856146` if there are 2 of the docs with the same value of `29319221615428073`.  But the actual result of the query is "null".
   
   ## Your Environment
   
   {"couchdb":"Welcome","version":"3.1.1","git_sha":"ce596c65d","uuid":"b8bdfb1c362410c3459c81b25214b276","features":["access-ready","partitioned","pluggable-storage-engines","reshard","scheduler"],"vendor":{"name":"The Apache Software Foundation"}}
   
   * CouchDB version used: 3.1.1
   * Browser name and version: Brave
   * Operating system and version: macOS Big Sur
   
   ## Additional Context
   
   


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[GitHub] [couchdb] janl commented on issue #3797: Cannot sum BigInt

[GitBox <gi...@apache.org>]

janl commented on issue #3797:
URL: https://github.com/apache/couchdb/issues/3797#issuecomment-950735085


   We cleared this up in Slack, this due to SpiderMonkey 60 being part of the Mac binary and BigInt only being available in 68+. Here is an experimental build with SM86: https://clients.neighbourhood.ie/couchdb/releases/3.2.0/


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[GitHub] [couchdb] janl closed issue #3797: Cannot sum BigInt

[GitBox <gi...@apache.org>]

janl closed issue #3797:
URL: https://github.com/apache/couchdb/issues/3797


   


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[GitHub] [couchdb] yxuco commented on issue #3797: Cannot sum BigInt

[GitBox <gi...@apache.org>]

yxuco commented on issue #3797:
URL: https://github.com/apache/couchdb/issues/3797#issuecomment-950050042


   I worked around the issue by using `parseFloat(v)` instead of `BigInt(v)`, although I am curious why BigInt does not work.


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