how can I get non-truncated version of running sql?

How do i find the FULL query running on a postgres instance? When I run:

SELECT datname, pid, state, query, age(clock_timestamp(), query_start) AS age
FROM pg_stat_activity
WHERE state <> 'idle'
AND query NOT LIKE '% FROM pg_stat_activity %'
ORDER BY age;

query seems to be truncated

Thanks!