Have you ever tried creating a sequence with an apostrophes in its name in PostgreSQL?
Easily, and don't forget about schema qualification either:
test=# create sequence "isn't this ""grand""?";
CREATE SEQUENCE
test=# \ds
List of relations
Schema | Name | Type | Owner
--------+---------------------+----------+---------
public | isn't this "grand"? | sequence | chriskl
(1 row)
test=# select nextval('"isn''t this ""grand""?"');
nextval
---------
1
(1 row)
test=# select currval('"isn''t this ""grand""?"');
currval
---------
1
(1 row)
test=# select currval('"public"."isn''t this ""grand""?"');
currval
---------
1
(1 row)
Chris