balazs(at)obiserver(dot)hu writes:
> test=# create table test.testtable (id bigserial not null primary key, t
> text not null);
> CREATE TABLE
> test=# alter table test.testtable rename to _testtable;
> ERROR: type "_testtable" already exists
> There is no, believe me!
Yes, there is ... it's the name given to the array type over the
table's composite type.
regards, tom lane