psql: show only failed queries

Hello

I was asked, how can be showed only failed queries in psql.

I am thinking, so it is not possible now. But implementation is very simple

What do you think about it?

bash-4.1$ psql postgres -v ECHO=error -f data.sql
INSERT 0 1
Time: 27.735 ms
INSERT 0 1
Time: 8.303 ms
psql:data.sql:3: ERROR: value too long for type character varying(2)
insert into foo values('bbb');
Time: 0.178 ms
INSERT 0 1
Time: 8.285 ms
psql:data.sql:5: ERROR: value too long for type character varying(2)
insert into foo values('ssssss');
Time: 0.422 ms

Regards

Pavel