currval() without specifying the sequence name

Hi,

Is there a way to retrieve the current value (i.e. the last used value) of the
last used sequence without specifying the sequence name? Something like the
following:

create table ( id serial, value varchar(10));
insert into someOthertest (value) values ('100');
insert into test (value) values ('10');
insert into test (value) values ('20');

select currval() should returns 2 (the last value of the test table sequence)

Thanks




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