andyatkinson

psql> create table t(a uuid, b text, c char(36));
CREATE TABLE

psql> insert into t values (gen_random_uuid(), 'some amount of text', 'some amount of text');
INSERT 0 1
                              
psql> select pg_column_size(a), pg_column_size(b), pg_column_size(c) from t;
 pg_column_size | pg_column_size | pg_column_size
----------------+----------------+----------------
             16 |             20 |             37