Re: BUG #5748: Invalid oidvector data during binary recv

"Yeb Havinga" <yebhavinga(at)gmail(dot)com> writes:
> postgres=# create table a as select ''::oidvector;
> SELECT 1
> postgres=# copy a to '/tmp/test' with binary;
> COPY 1
> postgres=# copy a from '/tmp/test' with binary;
> ERROR: invalid oidvector data

The problem seems to be that array_recv passes back a zero-dimensional
array, *not* a 1-D array, when it observes that the input has no
elements. A zero-D array is not part of the subset of possible arrays
that we allow for oidvector.

I'm less than convinced that this is worth fixing. oidvector is not
intended for general-purpose use anyway. What's the use-case where this
would come up?

regards, tom lane