I have just created a module to allow user to insert a field in a view which is the add of two other numeric fields in the view; so the resulting SQL is like: SELECT a,b, (a+b) c FROM table My approach is different from views_calc because it should work on grouped fields so: SELECT d, sum(a), sum(b), (sum(a)+sum(b)) FROM table GROUP BY d Now I need to add a filter and I don't know really where to start; I suppose I should start from views_handler_filter_numeric but I don't know anything else. Any hint is welcome; and if anybody is interested in this module I can send it. Thanks -- *La vida és com una taronja, què esperes a exprimir-la? *Si creus que l'educació és cara, prova la ignorància. *La vida és com una moneda, la pots gastar en el que vulguis però només una vegada. *Abans d'imprimir aquest missatge, pensa en el medi ambient.