[jira] [Created] (ZEPPELIN-87) Data order altered in bar chart

["Emmanuelle Raffenne (JIRA)" <ji...@apache.org>]

Emmanuelle Raffenne created ZEPPELIN-87:
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             Summary: Data order altered in bar chart
                 Key: ZEPPELIN-87
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-87
             Project: Zeppelin
          Issue Type: Bug
          Components: GUI
    Affects Versions: 0.5.0
            Reporter: Emmanuelle Raffenne


This has been described in https://github.com/NFLabs/zeppelin/issues/334 

The order is altered after calling pivot() on the data (zeppelin-web/app/scripts/controllers/paragraph.js). This is due to the JSON structure of the pivot-ed data ({schema: ...., rows: }) where values are used as field names of the rows object. 

According to EMACScript standard, an object is an unordered collection of key-value pairs and the mechanics and order of enumerating the properties is not specified. Actually, it looks like numeric field names are placed first but anyhow, the order is not guaranteed. 

We have implemented a fix that changes the structure of the object returned by the pivot() function, where the "rows" property now contains an array instead of an object.The pivotDataToD3ChartFormat() function has been adapted accordingly.

See changes at https://github.com/apache/incubator-zeppelin/compare/master...keedio:feature/x-axis-orderby 
We can generate a PR if you agree with the fix.



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