Don't make join output DataValueArray unless there are NAs#121

Merged

shashi merged 2 commits intomasterfrom s/no-na-join

Feb 15, 2018

+72-16

Commits on Feb 15, 2018

don't speculatively create DataValueArray in joins. Do so only if there are going to be nulls
Shashi Gowda
committed
fix bug when using custom function
Shashi Gowda
committed