error converting result query result to df

[Martin Karlsch]

I get the following error : "Error in x$timestamp : $ operator is invalid for atomic vectors" given the following query.

start = ymd(20150113)
end = ymd(20150120)
r = druid.query.groupBy(
  url = druid.url("master1.dw.xyz.com", port=8080),
  dataSource   = "mysource",
  intervals    = interval(start, end),
  aggregations = list(
    sum(metric("mycounter"))
  ),
  granularity  = granularity("all"),
  dimensions = list('xyz')
)

If I run the query with rawData=T, it works and the set looks like this.

     version    timestamp                           event.mycounter event.xyz
1        v1 2015-01-13T00:00:00.000Z             576                     <NA>
2        v1 2015-01-13T00:00:00.000Z            1167                        1
3        v1 2015-01-13T00:00:00.000Z               5                       10
4        v1 2015-01-13T00:00:00.000Z             102                    10080
5        v1 2015-01-13T00:00:00.000Z              24                     1020
6        v1 2015-01-13T00:00:00.000Z              25                     1080
7        v1 2015-01-13T00:00:00.000Z               2                       11
8        v1 2015-01-13T00:00:00.000Z              29                     1140
9        v1 2015-01-13T00:00:00.000Z              79                    11520
10       v1 2015-01-13T00:00:00.000Z               6                       12
11       v1 2015-01-13T00:00:00.000Z              55                      120
12       v1 2015-01-13T00:00:00.000Z              25                     1200
13       v1 2015-01-13T00:00:00.000Z              35                     1260
14       v1 2015-01-13T00:00:00.000Z              65                    12960

I looked into query.R / groupBytodf where it fails in ts <- laply(result, function(x) { x$timestamp } whereas class(x$timestamp) is "character".

Any ideas what is wrong here?

Ciao,
Martin