Mario Weilguni <mweilguni@sime.com> writes:
> The failing case is:
> ...
> SubPlan
> -> Hash Join (cost=8.47..19.46 rows=1 width=0) (actual time=0.004..0.004 rows=0 loops=21619)
> Hash Cond: ("outer".id = "inner".str_id)
> -> Bitmap Heap Scan on structure str (cost=2.02..12.92 rows=6 width=4) (actual time=0.100..30.095 rows=1
loops=1)
> Recheck Cond: (path ~ '142.2330445.2330598.2330676.*'::lquery)
> -> Bitmap Index Scan on str_uk4 (cost=0.00..2.02 rows=6 width=0) (actual time=0.090..0.090 rows=1
loops=1)
> Index Cond: (path ~ '142.2330445.2330598.2330676.*'::lquery)
> -> Hash (cost=6.43..6.43 rows=5 width=4) (actual time=0.032..0.032 rows=0 loops=1)
> -> Bitmap Heap Scan on foo2 bz (cost=2.02..6.43 rows=5 width=4) (actual time=0.025..0.025 rows=0
loops=1)
> Recheck Cond: (bid = $0)
> -> Bitmap Index Scan on foo2_bid_key1 (cost=0.00..2.02 rows=5 width=0) (actual
time=0.021..0.021rows=0 loops=1)
> Index Cond: (bid = $0)
Hmm, I wonder why the hash join's input nodes are showing "loops=1" ...
the hash depends on the subplan parameter $0 so it needs to be
re-evaluated each time through. It looks like that's not happening.
Do you have the corresponding results from 8.0 --- if so, what do
the loop counts look like?
regards, tom lane
