Hello Oleg,
my results are different. The analysis looks like this (please note the
different numbers of rows):
Aggregate (cost=104.05..104.06 rows=1 width=0) (actual
time=152.133..152.135 rows=1 loops=1)
-> Bitmap Heap Scan on search_tab (cost=5.39..103.98 rows=25 width=0)
(actual time=76.546..151.834 rows=116 loops=1)
Recheck Cond: ((to_tsvector('german'::regconfig, keywords) @@
'''ee'':*'::tsquery) AND (to_tsvector('german'::regconfig, keywords) @@
'''dd'':*'::tsquery))
-> Bitmap Index Scan on idx_keywords_ger (cost=0.00..5.38 rows=25
width=0) (actual time=76.292..76.292 rows=506 loops=1)
Index Cond: ((to_tsvector('german'::regconfig, keywords) @@
'''ee'':*'::tsquery) AND (to_tsvector('german'::regconfig, keywords) @@
'''dd'':*'::tsquery))
Total runtime: 152.389 ms
I have no idea, what could be the reason for different behaviour on your and
my machine (windows xp, postgreSQL 8.4.3)?
I reproduced the same wrong behaviour on a machine of my co-worker (windows
xp, postgreSQL 8.4.4).
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