Dear ggl2-users, Lets assume roi is an input datasource containing a numeric field called gid. I'm surprised to notice that: show roi filter(roi/gid == 2) select(roi/gid); show roi filter(roi/gid == 2) select(r | r/gid); do not return the same results: [{gid=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]}] [{gid=2}] What's wrong? Thanks a lot for your help.