Assigning using := on a join is throwing an "..allow.cartesian" error in 1.9.3

[rsaporta]

The code below works fine in 1.9.2 and broke in 1.9.3

:= is throwing the "rerun with allow.cartesian=TRUE" error

DT1 <- data.table(key="id", id=c(1:3, 1:3))
DT2 <- data.table(key="id", id=seq(10), name=LETTERS[1:10])


DT1[DT2, name := i.name]

[arunsrinivasan]

I think this is a duplicate of #800.

[rsaporta]

Possibly. The discussion on #800 appeared to be more of FR / understanding, but the root issue seems the same.

It appears that notjoin in [.data.table is failing to resolve to TRUE in update-type calls

[arunsrinivasan]

@rsaporta right. It's not a FR. Ed marked it as such, and I just forgot to change. In the text I'd written:

"However, on your first point, even though i has duplicate values (and therefore the error message is right), the fact that the end result will never be greater than nrow(x) warrants for that error message to be a bug."

Will change it to a bug, and close this (this post will anyways be referred to in the other post).