Re: Incremental View Maintenance, take 2

ok. Now I really found a small bug.

this works as intended:
BEGIN;
CREATE INCREMENTAL MATERIALIZED VIEW test_ivm AS SELECT i, MIN(j) as
min_j  FROM mv_base_a group by 1;
INSERT INTO mv_base_a select 1,-2 where false;
rollback;

however the following one:
BEGIN;
CREATE INCREMENTAL MATERIALIZED VIEW test_ivm1 AS SELECT MIN(j) as
min_j  FROM mv_base_a;
INSERT INTO mv_base_a  select 1, -2 where false;
rollback;

will evaluate
tuplestore_tuple_count(new_tuplestores) to 1, it will walk through
IVM_immediate_maintenance function to apply_delta.
but should it be zero?