[datatable-help] Bug in merge for data.table?

[Tom Short]

Agreed. There are a couple of bugs in merge that need to be fixed.
It's not as well used as the main data.table indexing.

- Tom

On Fri, Dec 31, 2010 at 9:52 AM, Matthew Dowle <mdowle at mdowle.plus.com> wrote:
>
> Looks like a bug to me. Thanks for raising it.
> Added here:
> https://r-forge.r-project.org/tracker/index.php?func=detail&aid=1241&group_id=240&atid=975
> Matthew
>
> On Wed, 2010-12-29 at 13:00 -0500, Joseph Voelkel wrote:
>> Consider the following code. It seems like the errors that occur when
>> y only has a key column is a bug. Yes?
>>
>>
>>
>> DT<-data.table(a=rep(1:2,each=3),b=1:6,key="a")
>>
>>
>>
>> y<-J(a=c(0,1),bb=c(10,11),key="a") # y, with key column and one more
>> column
>>
>> merge(y,DT) # fine
>>
>> merge(y,DT,all=TRUE) # fine
>>
>>
>>
>> y<-J(a=c(0,1),key="a") # y with only a key column
>>
>> merge(y,DT) # fine
>>
>> merge(y,DT,all=TRUE) # error
>>
>>
>>
>>
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>
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