Thanks for your reply Tom, and sorry for the duplicated e-mails. It's Postgres version 8.0.8 Thank you Gastón Quiroga Allytech S.A. Tom Lane wrote: =?ISO-8859-1?Q?Gast=F3n_Quiroga?= <gastonq@xxxxxxxxxxxx> writes:I checked the pg_user database and I found this:postgres=# select * from pg_user; usename | usesysid | usecreatedb | usesuper | usecatupd | passwd | valuntil | useconfig ---------------+----------+-------------+----------+-----------+----------+----------+----------- postgres | 1 | t | t | t | ******** | | postgres | 1 | t | t | t | ******** | | administrador | 100 | t | t | t | ******** | |What PG version is that? (Apparently pre-8.1, but what exactly?) It would be useful to look at the underlying table: select ctid,xmin,xmax,* from pg_shadow; regards, tom lane |