unlock shallow copy of .SD when needed in joins in j#3774

Merged

mattdowle merged 8 commits intomasterfrom

Aug 28, 2019

Commits on Aug 18, 2019

Closes #1926 -- unlock shallow copy of .SD when needed in joins in j
Michael Chirico
committed
cite Frank & fix vignette
Michael Chirico
committed

Commits on Aug 26, 2019

Merge branch 'master' into sd_join_locked
Michael Chirico
authored
Merge branch 'master' into sd_join_locked
Michael Chirico
committed
Merge branch 'sd_join_locked' of https://github.com/Rdatatable/data.table into sd_join_locked
Michael Chirico
committed

Commits on Aug 28, 2019

Merge branch 'master' into sd_join_locked
Michael Chirico
committed
add test for i unchanged after merge
Michael Chirico
committed
shortened news item and went further in centralizing .data.table.locked
mattdowle
committed