[bug] mlr stats1 prints nothing when two maybe-missing fields specified

[Komosa]

input:

a=1
b=2

cat input | mlr stats1 -a sum -f a:

a_sum=1.000000

but cat input | mlr stats1 -a sum -f a,b gives empty output

[johnkerl]

This is intentional -- it ignores records unless they have all aggregation fields. But the design should be changed to handle records which have any of the specified fields.

[johnkerl]

Fixed in head & will go out with the 2.3.2 release.

$ cat input
a=1
b=2

$ cat input | mlr stats1 -a sum -f a
a_sum=1.000000

$ cat input | mlr stats1 -a sum -f b
b_sum=2.000000

$ cat input | mlr stats1 -a sum -f a,b
a_sum=1.000000,b_sum=2.000000

Similarly fixed are mlr stats2 and mlr step. There is some separate work yet to be done on mlr join.

Thanks for reporting this -- it had been in the back of my brain for some time, but I hadn't gotten round to doing anything about it. :)

[johnkerl]

Above I wrote "There is some separate work yet to be done on mlr join" -- #82.