kdb lj ij uj joins and upgrading 2.6 to 3.x
December 21st, 2017 by Ryan Hamilton
A quick post to highlight something a lot of people are bumping into with upgrades. The joins in 3.x for uj/ij and lj all changed how they treat nulls from the keyed table. In particular nulls now by default overwrite existing values. In the past nulls from the joining table did not overwrite and left […]