Right, this won’t work in Hive 0.14. For that you’ll have to do:
insert into table t1 select c3 from t2;
if there are columns in t1 that you don’t want to select values for, you can assign a null in the select list. For example say that t1 has columns c1 and c2 and you only want a value in c1, then you could do:
insert into table t1 select c3, null from t2;