this operation is not supported for hash-partitioned tables and acquires

an <literal>ACCESS EXCLUSIVE</literal> lock, which could impact high-load

systems due to the lock's restrictive nature. For example, we can split

<programlisting>

ALTER TABLE measurement SPLIT PARTITION measurement_y2006q1 INTO

(PARTITION measurement_y2006m01 FOR VALUES FROM ('2006-01-01') TO ('2006-02-01'),

is($stderr, "", "no diff error");

done_testing();