HI,
I don't know why APEX is so underdeveloped.
I mean e.g. Interactive Grid and columns, column can be hidden using "server side condition" or "Authorization Scheme", additionally on the report side you can hide column using actions->columns option (which has to be saved using save report).
Alternating between these methods at the same time, I'm encountering an SQL error in the interactive grid: ora_sqlerrm: ORA-01403: data not found ORA-06512, and I can't do anything now because the page doesn't display, what can I do? new grid?:D.... why can't they polish it, it's already version 21!