"Thalis A. Kalfigopoulos" <thalis(at)cs(dot)pitt(dot)edu> writes:
> Then I insert:
> insert into lala values(1003,'{{"1_1","1_2"},{"2_1"}}');
IIRC, the array code is fairly buggy for non-rectangular arrays.
The array parser doesn't really do these correctly, and even if it
did, the *right* behavior IMHO would be to fill the missing elements
with NULLs, which can't be done yet because the array representation
doesn't handle NULL elements.
Someone needs to work on it --- want to volunteer?
regards, tom lane