Обсуждение: Oversight in CREATE FUNCTION + EXPLAIN?

Hey,

So I ran across this today:

CREATE OR REPLACE FUNCTION RETURN_LOTS(INT) RETURNS SETOF INT AS
   $$
      SELECT generate_series(1,$1);
   $$
COST 0.5 ROWS 50 SET work_mem TO '5MB' LANGUAGE 'SQL';

postgres=# explain analyze select return_lots(10000000);
QUERY PLAN
-----------------------------------------------------------------------------------------------
 Result  (cost=0.00..0.26 rows=1 width=0) (actual time=0.059..21411.187
rows=10000000 loops=1)
 Total runtime: 25951.904 ms

Shouldn't the estimated rows be 50?

Joshua D. Drake


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"Joshua D. Drake" <jd@commandprompt.com> writes:
> Shouldn't the estimated rows be 50?

It is if you do "select * from return_lots(10000000)".
        regards, tom lane