Scalding: Column Reordering In a Write Statement

[Brian Arnold]

Hi,

I am currently running into an issue where after i perform the following chained groupBy statement below, I cannot change the ordering of the fields in the write statement.  

....

.groupBy(('id,'week,'year)) {

    g => g.sum('soldQuantity -> 'aggrQuantity)

             .average('soldQuantity -> 'avgQuantity)          

....

.write(Csv(args('output), ",", fields = ('id, 'week, 'year, 'avgQuantity, 'aggrQuantity), quote = StringUtils.EMPTY))

In my chained groupBy statement I perform the sum first and the average second, but in my output I want to have the average first and the sum second.  I know that I can just change the order in which I am doing my groupBy statement, but it seems like if I am specifying the fields in a particular order in my write stement, it should output the fields in that order regardless of the order in which I actually performed them in previous statements. Will changing the order of the fields in the write statement not actually order them in that way in the output?

Thanks!

Brian

[Oscar Boykin]

use project to change the order:

.groupBy {

  

}

.project('avgQuantity, 'aggrQuantity)

That's the best way, I think.

Brian

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Oscar Boykin :: @posco :: http://twitter.com/posco