I need to increase the length of a string field using version 8.1 I was thinking to use ALTER TABLE since now altering a column type should be supported by pg. The column is currently varying(60) and I want to have it varying(120) After executing ALTER TABLE mytable ALTER COLUMN mycolumn TYPE varchar(120) I can see the column definition correctly changes and I can insert rows with longer data in mycolumn. But when I try to update data which were in the table before the ALTER TABLE I get "ERROR: value too long for type character varying(60)" It's like the old rows didn't update correctly keeping the old maximum length. I can see there's an optional USING clause for the ALTER TYPE, but is not really clear to me what should i add in this case, since basically I'd need no convertion... Thanks Paolo