eugene.mindrov@xxxxxxxxx writes: > is there any way to get comment meta-information for columns in a > view? I mean, suppose I have several tables and some of their columns > have comments, then I define a view on these tables, and what I want > is to somehow retrieve comments (if any) for those columns which are > selected in a view. > I tried to play with system catalog tables trying to dig out the > necessary info, but to no avail. > The best I could do is to retrieve all "dependent" columns (which > belong to underlying tables) for a view with their comments, but I > couldn't find any way to determine a relation between "dependent" > columns and those actually selected in a view. What do you consider "selected"? Given a view defined as select a, b, c+d as sum from tab where e > 42; what output are you wishing for? AFAIR the dependency mechanism will treat a,b,c,d,e alike. To do more you'd need to grovel through the pg_rewrite expression for the view's select rule, which'd be excruciatingly painful from a client program for lack of any supporting code. regards, tom lane
