hi everybody ! I try to extract datas from a table A to a table B but I don't want that table B be the same that table A concerning the structure. SO I have a query which calculate value of severals fieldsthat I want to see in the table B. The 2 schemas of table A and B are the following : table A : 2 fields : id et deb_sejour table B : 7 fields : deb_sejour, year, quarter, month, week_of_year, week_of_month,day My query is : "SELECT deb_sejour, extract(YEAR from deb_sejour) as year, extract(QUARTER from deb_sejour) as quarter, extract(MONTH from deb_sejour) as month, extract(WEEK from deb_sejour) as week_of_year, (2 + extract(WEEK from deb_sejour) - extract(MONTH from deb_sejour) * 4) as week_of_month, extract(DAY from deb_sejour) as day FROM datas_sejour" I have the following error for each fields (except for deb_sejour which is commun to the both tables): Exception in thread "main" java.lang.Error: Unresolved compilation problems: row1.year cannot be resolved or is not a field row1.quarter cannot be resolved or is not a field I have a tpostgresqlinput objet and a tpostgresqloutput objet and my query appears in the query parameter of the tpostgresqlimput object. If someone has an idea, that will be great :) Thanks a lot, Regards, Ted